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Search found 894 matches

by MechRick
Thu Apr 18, 2019 8:25 pm
Forum: Turbo, Supercharger, and Nitrous
Topic: Question on my air fuel ratio on my supercharger wagon
Replies: 22
Views: 2035

Re: Question on my air fuel ratio on my supercharger wagon

Carbs used with blow-through setups will need to be incrementally richer. I recommend getting a good book on the subject (if you haven't already). I like Street Supercharging (S A design books, Pat Ganahl). It has a whole chapter on carb tuning for use with blowers. https://www.amazon.com/Complete-G...
by MechRick
Thu Apr 18, 2019 8:06 pm
Forum: 240-300 "Big Block" Six Performance
Topic: What's wrong with this picture...
Replies: 9
Views: 932

What's wrong with this picture...

I was diagnosing an emissions failure on a 4.9L F150 today. It was blowing 1300 ppm HC and 13% CO. Thought I would share an image of the engine compartment. The owner has had a few different mechanics (using that term loosely) working on it. See if you can spot what was wrong with it. https://fordsi...
by MechRick
Sun Mar 24, 2019 5:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Swap done, engine cranks, no full power stroke
Replies: 45
Views: 2795

Re: Swap done, engine cranks, no full power stroke

Unplugging the FP relay will rule out a stuck injector or shorted injector control circuit.

You may have to pull and dry the plugs.

Determining whether it's spark or fuel will narrow the list of possible faults.
by MechRick
Sat Mar 23, 2019 4:22 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Swap done, engine cranks, no full power stroke
Replies: 45
Views: 2795

Re: Swap done, engine cranks, no full power stroke

With the compression you have, the engine should run given proper fuel and spark timing.
It sounds to me like you are getting too much fuel.

Would it be possible to unplug the fuel pump relay, dry the engine out and see if it runs with an external fuel source?
by MechRick
Fri Mar 22, 2019 4:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Power glide adapter
Replies: 15
Views: 1135

Re: Power glide adapter

The crank patterns are the same, but it might have a balance weight on it.
If so, knocking the weight off and neutral balancing it should do the trick.
by MechRick
Thu Mar 21, 2019 9:52 pm
Forum: 240-300 "Big Block" Six Performance
Topic: need help troubleshooting mc 2150
Replies: 12
Views: 934

Re: need help troubleshooting mc 2150

If one booster dribbles fuel before the other, double check the air bleeds for restrictions.

If the idle speed is set too high, fuel can dribble from the boosters, but both equally.
by MechRick
Tue Mar 19, 2019 2:56 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Swap done, engine cranks, no full power stroke
Replies: 45
Views: 2795

Re: Swap done, engine cranks, no full power stroke

Speed density or mass air flow? Make sure you have intake manifold vacuum to the MAP if the answer to that question is speed density.
by MechRick
Wed Mar 13, 2019 11:00 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Need Help Troubleshooting ICM
Replies: 13
Views: 1360

Re: Need Help Troubleshooting ICM

I wish you had a known good ECM so you could rule that out. I recommend going back to basics. When I get stumped on a strange electrical problem like this, I will walk away from it for a while to clear my head. It's amazing how the mind will get stuck in a diagnostic rut. Then I'll research the syst...
by MechRick
Wed Mar 13, 2019 1:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: C5AE rods
Replies: 54
Views: 3670

Re: C5AE rods

One of those big two valve Kawasakis with an open megaphone header has to be the best sounding four in existence. Nothing like it...
by MechRick
Mon Mar 11, 2019 9:32 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 240 misfire
Replies: 3
Views: 504

Re: 240 misfire

Sounds like an exhaust valve not opening. Might want to pull the valve cover, disable the ignition and crank the engine over while looking at the valve train...
by MechRick
Mon Mar 11, 2019 3:13 pm
Forum: 240-300 "Big Block" Six Performance
Topic: EFI Exhaust Manifold Conversion
Replies: 14
Views: 1368

Re: EFI Exhaust Manifold Conversion

The EGR is to reduce NOX. It can also help fuel economy by reducing pumping losses. More throttle (to maintain speed when EGR is flowing) equals less manifold vacuum equals a reduction in pumping losses.
by MechRick
Mon Feb 25, 2019 6:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1984 300 won't run
Replies: 57
Views: 3793

Re: 1984 300 won't run

Is it spitting air and fuel out of the carb while cranking, or just dumping liquid fuel like a stuck float valve?

Usually when an engine spits air and fuel out along with wrong distributor timing it indicates wrong cam timing.
by MechRick
Sat Feb 23, 2019 3:23 pm
Forum: Fuel Injection - Mega Squirt
Topic: Fuel Injected 200 NA
Replies: 6
Views: 3502

Re: Fuel Injected 200 NA

I like it!
Curious why you are running an external map sensor?

The common plenum on the tripower is cool. I was brainstorming one day about a one barrel throttle body in the middle with two carbs plumbed off the return line. Your solution is more practical.
by MechRick
Thu Feb 21, 2019 11:59 am
Forum: 240-300 "Big Block" Six Performance
Topic: Need Help Troubleshooting ICM
Replies: 13
Views: 1360

Re: Need Help Troubleshooting ICM

The spout circuit runs from pin 36 of the PCM to the 2nd pin in the ICM (pink wire). Disconnect the PCM and the ICM, key on, check for shorts to power and ground. Key off, check continuity between the PCM and ICM. You should read less than 2-3 ohms. It's a good idea to wiggle the harness during this...
by MechRick
Wed Feb 13, 2019 8:57 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Need Help Troubleshooting ICM
Replies: 13
Views: 1360

Re: Need Help Troubleshooting ICM

It depends on a bunch of factors, but 32 degrees sounds about right to me.

Are you still getting codes on a running test?
by MechRick
Tue Feb 12, 2019 10:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Need Help Troubleshooting ICM
Replies: 13
Views: 1360

Re: Need Help Troubleshooting ICM

'Spout' is the circuit from the PCM to the ignition module. When unplugging the spout connector with the engine running the code 213 will trip inadvertently. You shouldn't see it on a running test with the spout connector in place though. When Ford finally remote-mounted the TFI to the heat sink and...
by MechRick
Sun Feb 10, 2019 9:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Need help with ignition timing crane 503901 cam
Replies: 13
Views: 1386

Re: Need help with ignition timing crane 503901 cam

If you disconnect the spout connector while the engine is running, RPM should drop. Plugging it back in will have the opposite affect. Nothing moves in a TFI-IV distributor. You'll notice a short rod with a 90 degree bend where the vacuum advance would normally go (Ford calls it an octane rod, on en...
by MechRick
Thu Feb 07, 2019 11:15 am
Forum: 240-300 "Big Block" Six Performance
Topic: Need help with ignition timing crane 503901 cam
Replies: 13
Views: 1386

Re: Need help with ignition timing crane 503901 cam

I would try 12 BTDC and see how it runs. Listen carefully for ping. Are you running the stock speed density PCM? One of the advantages of Duraspark with a carb is the distributor can be recurved with springs and total advance can be limited by using a different advance plate, or restricting the tang...
by MechRick
Tue Jan 29, 2019 4:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Re-curved distributors on "modified engines" What do you mean???
Replies: 13
Views: 1821

Re: Re-curved distributors on "modified engines" What do you mean???

Isn't this like students lecturing the teacher? :D Opinions I have, limited experience I can share. I've always heard performance engines should be 'all in' at 3000 RPM. Tried this on a blow-through turbo on pump gas. Detonated like crazy. Conclusion? Pump gas engines with stock combustion chambers ...
by MechRick
Tue Jan 29, 2019 4:16 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Variable ignition timing
Replies: 14
Views: 1187

Re: Variable ignition timing

I've done something similar with a megasquirt while pulling a long, 6% grade. What I found is it's almost impossible to feel a seat of the pants difference when changing the timing tables. Advancing too much causes an audible ping, but no noticeable power change. I know the power output is changing,...
by MechRick
Fri Jan 18, 2019 3:33 pm
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 2502

Re: misaligned block cam journal

Guys, I have to mention something you may find interesting or already know. So, about 4 days ago when the temp was about 12* warmer here, I measured in the afternoon the main bearings on my engine and they showed I had just under .0007. Four days later, when the temp is 12* colder, in the morning I...
by MechRick
Thu Jan 17, 2019 12:05 pm
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 2502

Re: misaligned block cam journal

When I got the crank in the second block I found that the mains were out of spec. They were beyond the .0015 limit in the book My first 300 six went 285,000 miles before a carb bellcrank screw decided it wanted to be on top of #1 piston. This was an engine that rattled so bad on startup it would ma...
by MechRick
Wed Jan 16, 2019 1:49 pm
Forum: 240-300 "Big Block" Six Performance
Topic: misaligned block cam journal
Replies: 33
Views: 2502

Re: misaligned block cam journal

I've run into this on Ford V8's. It's not uncommon to have to 'relieve' a cam bearing slightly. As long as it's limited to one edge of the bearing (and not the entire bearing) it should be fine. I had a 460 apart once that a remanufacturer had ground the cam bearing journals smaller (to save the cam...
by MechRick
Fri Jan 11, 2019 3:09 pm
Forum: 240-300 "Big Block" Six Performance
Topic: I bought a used zf5-42 for my 1984 f-150
Replies: 21
Views: 1900

Re: I bought a used zf5-42 for my 1984 f-150

It may be possible to convert the hydraulics to use AN3 line. There are adapters to mate the 'o' ring/pin factory setup, something like Russell 640281 or similar. When I converted my Bronco and F150 to the ZF5, I had to use the tunnel cover off a later truck and a C6 trans mount to get it to fit und...
by MechRick
Fri Jan 04, 2019 3:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 82 F150 Parasitic Draw Electrical Question
Replies: 17
Views: 1769

Re: 82 F150 Parasitic Draw Electrical Question

Are you checking with a voltmeter? If so, just set it to DC volts, grab your two test leads and check the primary (coil) side for ~12v key on, and 0v key off. Primary side is the bottom right and middle wires in your image. Your red lead will tell you the polarity to determine which is ground (if it...
by MechRick
Thu Jan 03, 2019 1:58 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 82 F150 Parasitic Draw Electrical Question
Replies: 17
Views: 1769

Re: 82 F150 Parasitic Draw Electrical Question

From your image, it seems like the primary (coil) side of the relay has the correct signals. Try unplugging the relay and checking the red (orange?) wire for power, to rule out (or confirm) a short to VPWR.

Does the relay click when cycling the ign on/off?
by MechRick
Wed Jan 02, 2019 7:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 82 F150 Parasitic Draw Electrical Question
Replies: 17
Views: 1769

Re: 82 F150 Parasitic Draw Electrical Question

Sounds like a short in the VPWR circuit. VPWR comes from the ignition switch in 'run' and 'start'. It powers up (and turns on) the EEC relay, carb solenoid, TAB and TAD solenoids, throttle kicker (if equipped), tach (if equipped). The EEC relay will most likely have on the small pins (coil side), a ...
by MechRick
Mon Dec 31, 2018 6:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 82 F150 Parasitic Draw Electrical Question
Replies: 17
Views: 1769

Re: 82 F150 Parasitic Draw Electrical Question

I get a reading of 12.9 DC Volts at the battery with the alt charging at idle So I went out yesterday morning and tried the test again and it read 3-5 miliamps and it was jumping all around. After a few minutes it stabilized at around 1.0 milliamps and stayed there Immediately after I shut the truc...
by MechRick
Tue Dec 11, 2018 11:39 am
Forum: 240-300 "Big Block" Six Performance
Topic: Holley 5200 jetting
Replies: 14
Views: 1977

Re: Holley 5200 jetting

I'm running this setup on my Bronco with a Megasquirt: http://www.wide-band.com/product-p/apsx_d2n_gauge.htm https://shop.advanceautoparts.com/p/bosch-wide-band-oxygen-sensor-17014/18730616-p?c3ch=PLA&c3nid=18730616-P&adtype=pla_with_promotion&gclid=Cj0KCQiA3b3gBRDAARIsAL6D-N-uczHPcPaA3D...
by MechRick
Sun Dec 09, 2018 10:47 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Holley 5200 jetting
Replies: 14
Views: 1977

Re: Holley 5200 jetting

My recommendation would be to start with the jets, air bleeds and well tubes used on the Weber kit for 258 Jeeps. Barring that, some of the characteristics of the Weber (5200) are: Idle jet affects the transition circuits and idle. Idle is further adjustable by the screw. Trying to adjust idle with ...
by MechRick
Thu Nov 29, 2018 3:19 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carb head combustion chamber question.
Replies: 79
Views: 5510

Re: Carb head combustion chamber question.

pmuller9 wrote:The Crower 284HDP (19205) .509”/.517” 220/222 284/290 110deg


Based on my experience with Comp's 268H (219 @ .050", 110 LC) that *might* lope a bit with a carb intake. Depends on idle RPM.

The lope went away with an EFI intake and aftermarket (Megasquirt) fuel management.
by MechRick
Mon Nov 19, 2018 3:08 pm
Forum: 240-300 "Big Block" Six Performance
Topic: timing issue on 240 or??/ Helllpppp!
Replies: 12
Views: 1007

Re: timing issue on 240 or??/ Helllpppp!

If it spits fuel up out of the carb while cranking, it's most likely cam timing. To prove it, turn the balancer until the timing mark lines up at the 0 degree mark, pull the cap, the rotor should point at number 1 or number 6 (or slightly before). Since the distributor is driven by the cam, if cam t...
by MechRick
Thu Nov 15, 2018 5:21 pm
Forum: 240-300 "Big Block" Six Performance
Topic: opinions on a b.b. 300 in school bus
Replies: 36
Views: 3036

Re: opinions on a b.b. 300 in school bus

The spacing between 4th and 5th on the ZF5 is a bit wide. When I'm towing my TT at a combined weight of ~12,000 lbs, I keep wishing for an extra gear between 4th and 5th or higher numerical rear gears. Higher gears would work fine, but limit top/cruise speed (probably not an issue with a bus). A ZF6...
by MechRick
Thu Oct 25, 2018 7:43 pm
Forum: 240-300 "Big Block" Six Performance
Topic: T18 or T170?
Replies: 16
Views: 1987

Re: T18 or T170?

Years ago as a Ford dealer tech I had a Fox body come in for it's second warranty clutch at 8,700 miles. Yes, 8,700 miles. The disc was destroyed, all the clutch material down in the bellhousing. I asked the salesman that sold the car to the young girl to go for a ride with her and report back. His ...
by MechRick
Fri Oct 19, 2018 6:26 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So, another piston question
Replies: 18
Views: 1929

Re: So, another piston question

So that's the question right? Run the 390 pistons and not zero deck. Run the 1186 pistons and zero deck. I'm leaning towards 390 pistons with a close to zero deck. I run 93 octane anyway more for the additives than the octane. Assuming the same compression ratios is there an advantage either way? A...
by MechRick
Fri Oct 19, 2018 4:55 pm
Forum: 240-300 "Big Block" Six Performance
Topic: So, another piston question
Replies: 18
Views: 1929

Re: So, another piston question

390 pistons will work, as long as the block is safe .050" over. 352 pistons will work, but will be proud of the deck a bit, milling the top of the pistons will fix that. There are no (to my knowledge) performance 352 pistons in the aftermarket. All of the above choices will result in an engine ...
by MechRick
Fri Sep 28, 2018 3:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 300 carb heads
Replies: 11
Views: 1501

Re: 300 carb heads

FYI, the stud mount carb heads used cast rockers, that clear the 'Power By Ford' valve cover. Other rockers may interfere with that particular cover. Clearancing the PCV baffles will allow it to fit.

I just thought you should know, and know you do.
by MechRick
Tue Sep 25, 2018 3:28 pm
Forum: 240-300 "Big Block" Six Performance
Topic: 1988 4.9 I6 upgrades
Replies: 40
Views: 4312

Re: 1988 4.9 I6 upgrades

A properly tuned megasquirt with a mild cam won't impact MPG at all. I ran a Comp 268 with a megasquirt and performance exhaust, MPG was same as stock (16 MPG). The stock injectors are wimpy 14 lb-hr. Running aftermarket ECU's open up the possibility for higher flow injectors. If you want the engine...
by MechRick
Fri Sep 14, 2018 5:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: FiTech (or other FI systems) used with boost.
Replies: 34
Views: 3239

Re: FiTech (or other FI systems) used with boost.

I would try to chose a system that would allow for some user flexibility. The ability to plug in larger injectors or tune with a laptop for safe running under high boost levels at a minimum. The problem with high boost levels is choosing just enough injector to supply the needed fuel at WOT and high...
by MechRick
Tue Sep 11, 2018 2:56 pm
Forum: The Truck Stop
Topic: 1993 f150 emissions problem - Arizona
Replies: 5
Views: 1399

Re: 1993 f150 emissions problem - Arizona

The purge valve and associated hoses should be a visual inspection. Pressure testing should be from the canister toward the tank(s).
by MechRick
Mon Sep 10, 2018 10:29 pm
Forum: The Truck Stop
Topic: 1993 f150 emissions problem - Arizona
Replies: 5
Views: 1399

Re: 1993 f150 emissions problem - Arizona

Check the rubber lines going to the carbon canister underhood. Fuel vapor will make them soft and eventually, leak. The '80-'96 trucks all use a simple evap system (even the '96 obdII trucks-always wondered how Ford got away with that). The vents at the top of the fuel tanks have lines that should b...
by MechRick
Mon Sep 10, 2018 10:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: VINTAGE CHAMP CAR REPLICA BUILD
Replies: 51
Views: 7991

Re: VINTAGE CHAMP CAR REPLICA BUILD

Sounds good! Can't wait to hear it with a more aggressive cam.

Glad the lazy #4 cylinder was an easy fix...Whenever I hear one cylinder bleeding off while cranking, my peril-sensitive sunglasses go opaque...
by MechRick
Mon Sep 10, 2018 9:44 pm
Forum: The Truck Stop
Topic: F150 vs F250 frames ('80-'96)
Replies: 1
Views: 1114

F150 vs F250 frames ('80-'96)

This is a subject I've tried to dig up information on (with little success). I finally got a chance to crawl under both of my trucks and take some quick and dirty measurements. All checks were done under the driver's door where the frame grows in height. F150 height: https://fordsix.com/img/upload/2...
by MechRick
Sat Sep 08, 2018 10:48 pm
Forum: Orphan Inlines
Topic: 1984 Ford 2.3L powered Bronco II
Replies: 150
Views: 46088

Re: 1984 Ford 2.3L powered Bronco II

Awww, shucks, Joe. I'm just having fun with junk.... :D
by MechRick
Tue Sep 04, 2018 6:37 pm
Forum: Orphan Inlines
Topic: 1984 Ford 2.3L powered Bronco II
Replies: 150
Views: 46088

Re: 1984 Ford 2.3L powered Bronco II

Explorers have 31 spline axles, but need perches welded on top of the axle tubes. About 1.5" wider. Later ones have disc brakes in the rear, desirable in the event the C clip 'hat' breaks off for axle retention. Keeping my eyes open, may score one from a 4.10-equipped Explorer if I'm diligent...
by MechRick
Tue Sep 04, 2018 3:23 pm
Forum: Orphan Inlines
Topic: 1984 Ford 2.3L powered Bronco II
Replies: 150
Views: 46088

Re: 1984 Ford 2.3L powered Bronco II

I intended to roll the edge, but it looks good enough I may not. Body lift with the 2" square tubing is 2", tires are 31x10.50-15. Also removed the carpet (had to to access the body mount bolts), and although I intend to replace the carpet at some point (I'm not fond of red interiors), dec...
by MechRick
Sun Sep 02, 2018 10:44 pm
Forum: Orphan Inlines
Topic: 1984 Ford 2.3L powered Bronco II
Replies: 150
Views: 46088

Re: 1984 Ford 2.3L powered Bronco II

Untrimmed...

Image

...and trimmed.

Image

See the difference? It's subtile, especially in the rear.
by MechRick
Sun Sep 02, 2018 11:29 am
Forum: 240-300 "Big Block" Six Performance
Topic: Carb jetting question 2100 1.08 venturi.
Replies: 25
Views: 2760

Re: Carb jetting question 2100 1.08 venturi.

Your idle screw setting seems to indicate the idle circuit (and transfer circuit) are rich. Make sure the float setting is correct and the air bleeds are clear. It is possible to drill air bleeds oversize to lean the idle circuit, but you really should have a wideband on the truck (a good idea anywa...
by MechRick
Sun Sep 02, 2018 11:07 am
Forum: Orphan Inlines
Topic: 1984 Ford 2.3L powered Bronco II
Replies: 150
Views: 46088

Re: 1984 Ford 2.3L powered Bronco II

The body lift had an expected benefit. The header for a car application I had hanging on the shop wall now clears the evaporator plenum. Installed it and welded up some 2.5" pipe. https://fordsix.com/img/upload/2018/09/02/20180902103201-7b47d8e7.jpg https://fordsix.com/img/upload/2018/09/02/201...
by MechRick
Sun Sep 02, 2018 11:02 am
Forum: Orphan Inlines
Topic: 1984 Ford 2.3L powered Bronco II
Replies: 150
Views: 46088

Re: 1984 Ford 2.3L powered Bronco II

Body mounts are new. Getting the old body mount sleeves apart took the better part of a weekend.

Steering shaft had to be lengthened 1.5".

Image

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