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Search found 31 matches

by midwestbird
Sat Nov 02, 2019 1:36 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Push rod separated from rocker arm
Replies: 16
Views: 1178

Re: Push rod separated from rocker arm

I wanted to provide an update to this issue, in case anyone discovers this thread in the future. The resolution wasn't clear or immediate because this pushrod issue occurred while attempting to resolve other issues. The short of it: I ended up just reinstalling the pushrod, lubing the valve stem, an...
by midwestbird
Fri Jul 05, 2019 11:28 am
Forum: 240-300 "Big Block" Six Performance
Topic: Push rod separated from rocker arm
Replies: 16
Views: 1178

Re: Push rod separated from rocker arm

If the intake valve was closed for a period of time it should not have damaged the piston ring. It may have sucked a little oil up into the cylinder which should be evident on restart by blue smoke, after everything has been put back in its proper place. That makes me feel better. Thanks. I doubt I...
by midwestbird
Fri Jul 05, 2019 10:48 am
Forum: 240-300 "Big Block" Six Performance
Topic: Push rod separated from rocker arm
Replies: 16
Views: 1178

Re: Push rod separated from rocker arm

Thanks for the input/suggestions. I plan to do some combination of what has been suggested here. My co-worker has a leak-down tester I plan to borrow - which I am hoping will confirm that my valves are sealing, and whether this issue has caused any problem with my piston ring. With the intake valve ...
by midwestbird
Thu Jul 04, 2019 2:48 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Push rod separated from rocker arm
Replies: 16
Views: 1178

Re: Push rod separated from rocker arm

Yes that’s an intake does that intake valve stem tip look like it’s setting up as high as the other intakes ? Does the valve move and return if you push or pry on it with a small bar? Rocker arm looks bent in that picture. Good luck. :nod: I measured the heights of the flat surfaces on top of the s...
by midwestbird
Thu Jul 04, 2019 11:54 am
Forum: 240-300 "Big Block" Six Performance
Topic: Push rod separated from rocker arm
Replies: 16
Views: 1178

Re: Push rod separated from rocker arm

A view from the passenger side.
IMG_20190704_104515893.jpg
by midwestbird
Wed Jul 03, 2019 4:44 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Push rod separated from rocker arm
Replies: 16
Views: 1178

Re: Push rod separated from rocker arm

Thanks for all the input. I looked at the service manual, and sure enough, it shows that valve as the intake valve. I suppose I will first investigate what might be lodged in the intake valve...
by midwestbird
Tue Jul 02, 2019 10:27 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Push rod separated from rocker arm
Replies: 16
Views: 1178

Re: Push rod separated from rocker arm

Thanks for the suggestions. I may just replace the pushrod and see what happens. And I should at least inspect the other components for obvious damage as well. Edit: I just noticed its an EFI motor. I don't know how hard it is to get to the side cover. I just recently took off the pushrod cover to r...
by midwestbird
Tue Jul 02, 2019 6:50 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Push rod separated from rocker arm
Replies: 16
Views: 1178

Push rod separated from rocker arm

My engine recently began starting/idling terribly (1990 4.9L). I performed a compression test: cylinders 1, 3-6 measured 160 - 170 p.s.i. Cylinder #2 was about 10 p.s.i. My engine vibrates excessively at idle and a piece of paper in front of the exhaust tail pipe pulses in and out. According to what...
by midwestbird
Fri Jan 18, 2019 10:34 am
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

So, I'm very pleased the remanuf EEC-IV alleviated the bucking. My remaining problems are the bumping noise (similar to symptom 2 in the above article), and the engine has a difficult time starting. It seems to stumble and misfire for several seconds when I try to start it cold. It starts easier if...
by midwestbird
Wed Nov 07, 2018 9:10 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fluttering Fuel Pressure gauge when FPR vacuum disconnected
Replies: 3
Views: 754

Re: Fluttering Fuel Pressure gauge when FPR vacuum disconnected

Thanks for the response. Without the vacuum, it should be higher and closer to the 50-60psi spec. You can also test it without the engine running, with the fuel pump on. You'll have to jump the relay or find another way to constant power the pump other than key on. Earlier, I did test fuel pressure ...
by midwestbird
Sun Oct 21, 2018 3:25 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Fluttering Fuel Pressure gauge when FPR vacuum disconnected
Replies: 3
Views: 754

Fluttering Fuel Pressure gauge when FPR vacuum disconnected

My '90 F-150 ran rough when I bought it (January 2017) and I have been picking at it ever since. I'm no mechanic, but am comfortable attempting basic repair work. Before I continue to troubleshoot my newest problem, I thought I'd first petition others for advice as I haven't found much info online r...
by midwestbird
Thu Aug 23, 2018 7:46 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

This website mentioned evap purge valve as a potential problem. And here is another site that associates hard starting condition with a bad purge valve... I just ordered a replacement (Motorcraft), we'll see if a new one makes any difference ... My EVAP purge valve wouldn't hold a vacuum, so I repl...
by midwestbird
Sat Aug 18, 2018 12:51 pm
Forum: Electrical, Audio, and Electronics
Topic: 2.5V at Knock Sensor connector (should be 5V)
Replies: 6
Views: 1865

Re: 2.5V at Knock Sensor connector (should be 5V)

xctasy wrote:The 1990-ford-f-150-truck-electrical-vacuum-troubleshooting-wiring-manual is best.

Thanks, I ordered a copy of that manual.

Apparently, some have had success with the TF-K141 knock sensor as a replacement. I ordered one, installed it, but my KOER code 25 remains, as well as my other symptoms.
by midwestbird
Sat Aug 18, 2018 12:42 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

I'm very interested if you find a solution to the stumble on cold start. Still working on it, unfortunately. Of course, they don't make the replacement Knock Sensor any longer. Apparently some have had success with the TF-K141 knock sensor as a replacement. I purchased one, installed it, and it had...
by midwestbird
Sun Aug 12, 2018 1:40 pm
Forum: Electrical, Audio, and Electronics
Topic: 2.5V at Knock Sensor connector (should be 5V)
Replies: 6
Views: 1865

Re: 2.5V at Knock Sensor connector (should be 5V)

I have a Haynes, as well as the two main Ford service manuals. These, however, don't have info on the EEC-IV or its sensors. Are either of these the manuals I need: This one, or this one?
by midwestbird
Sat Aug 11, 2018 9:34 am
Forum: Electrical, Audio, and Electronics
Topic: 2.5V at Knock Sensor connector (should be 5V)
Replies: 6
Views: 1865

Re: 2.5V at Knock Sensor connector (should be 5V)

Wow, thanks for all the info. Very good news for me that Haynes is wrong in this case. I was hoping someone on this forum would be able to shed some light on my situation, and you certainly have. I will happily move forward with replacing my KS now that I know my ref voltage is OK. Hopefully this po...
by midwestbird
Sat Aug 11, 2018 12:09 am
Forum: Electrical, Audio, and Electronics
Topic: 2.5V at Knock Sensor connector (should be 5V)
Replies: 6
Views: 1865

2.5V at Knock Sensor connector (should be 5V)

My 1990 4.9L throws a OBD1 KOER code 25 (knock sensor). It also exhibits other symptoms of a bad knock sensor ( Symptom 2 , and misfiring of the engine on starting as described here ). I foolishly went through the trouble of acquiring an aftermarket KS (a scarce resource these days) before I checked...
by midwestbird
Sat Aug 04, 2018 7:29 am
Forum: 240-300 "Big Block" Six Performance
Topic: Are all spout plugs the same
Replies: 3
Views: 881

Re: Are all spout plugs the same

94f150rules wrote: The spout plug is missing.

Mine was missing too. The Ford part # is E53Z14489C. They're available online, but I just bought a new one at the Ford Dealer service counter for $10. I'll be on the look out for a spare next time I am at the junk yard.
by midwestbird
Fri Aug 03, 2018 8:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

Several suggestions were made, and I wanted to provide an update as I did read and consider the input provided. The engine could be running lean, or there could be a problem with the ignition system. Be aware that the PCM's in these older trucks have electrolytic capacitors that, with age, are start...
by midwestbird
Sat Jul 07, 2018 7:29 am
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

I drained the old gas, and replaced with fresh. Wedged a paper clip in the SPOUT plug, taped it in place, and probed from the back of the connector to ascertain continuity. I was surprised when I started it up that, even with SPOUT connected, the truck runs just as rough as it did before. The EEC-IV...
by midwestbird
Fri Jun 08, 2018 10:31 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

I second the timing light. Even when you get the jumper in you'll need it to confirm it made a good connection (don't bet on a connector that's been sitting around corroding without a plug in it making a good connection the first time). $5 says you've got one or more sensors that are old enough to ...
by midwestbird
Fri Jun 08, 2018 6:35 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

I seem to remember more than one of those connectors underhood. The correct one will have yellow/light green wires going to it. I just noticed I also have a lone connector coming off my ignition coil. I do not think this was connected to anything before I removed the coil to test it. I can clearly ...
by midwestbird
Thu Jun 07, 2018 11:04 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

Also, disconnect the spout connector and see if the problem goes away. I had to look up "spout connector" after reading your response. I remember seeing that plug not connected to anything and had some concern that something wasn't hooked up properly (expecting every plug in my engine bay...
by midwestbird
Thu Jun 07, 2018 6:11 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

As for the bucking concern, any fault codes? The engine could be running lean, or there could be a problem with the ignition system. Be aware that the PCM's in these older trucks have electrolytic capacitors that, with age, are starting to leak. You might be able to pop the cover on the computer an...
by midwestbird
Wed Jun 06, 2018 6:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

I appreciate all the responses, thanks. I just carefully removed the gunk I could get to. After I get past my bucking issue, I plan to run seafoam or another valve cleaner through the intake. It's easy to do, but I don't want to get too sidetracked right now from my main mission.
by midwestbird
Mon Jun 04, 2018 10:20 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

I have read that installing an oil catch can after the PCV but prior to the manifold lessens the likelihood of this type of build up. I think you're right. I hadn't heard of a catch can until reading your response. I've been reading up on them, and that appears to be just what they're for. Maybe I'...
by midwestbird
Mon Jun 04, 2018 5:17 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Re: Carbon Sludge in Intake Port @ Fuel Injector

I guarantee you the intake valves look the same way. Solvents will not do anything. Thanks for the input. So, you don't think if I run a few bottles of Chevron Techron through my tank, it will do anything to break up the carbon that is surely stuck to the back of my intake valve? I could peek in wi...
by midwestbird
Sun Jun 03, 2018 9:01 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Carbon Sludge in Intake Port @ Fuel Injector
Replies: 30
Views: 4133

Carbon Sludge in Intake Port @ Fuel Injector

I am currently attempting to address potential causes of my F-150 violently bucking. I had read a possible cause of my bucking issue is dirty fuel injectors. So, I decided to remove my injectors and attempt a YouTube-inspired DIY fuel injector cleaning (using carb cleaner and 12V battery). I attache...
by midwestbird
Mon Apr 24, 2017 8:24 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Mysterious clear tube between intake ducts
Replies: 7
Views: 1670

Re: Mysterious clear tube between intake ducts

I believe I would remove the tube and properly plug the holes to prevent any unfiltered air from being drawn in. Yes, I think I'd like to do that. Either fill both holes with a rubber hole plug of some kind, or just grab a replacement duct at a junk yard. I appreciate all the comments. https://cdn3...
by midwestbird
Sat Apr 22, 2017 9:54 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Mysterious clear tube between intake ducts
Replies: 7
Views: 1670

Re: Mysterious clear tube between intake ducts

I assumed this tube was meant to correct a problem but I think you could be right that there was possibly something installed there (like a water injection system, as you stated) at one time and when the system was removed--rather than replace the ducts or plug the open holes--they just stuck a tube...
by midwestbird
Sat Apr 22, 2017 2:39 pm
Forum: 240-300 "Big Block" Six Performance
Topic: Mysterious clear tube between intake ducts
Replies: 7
Views: 1670

Mysterious clear tube between intake ducts

Full disclosure: I posted this question on another Ford forum. I didn't receive any responses, so I'll pose it here: I recently purchased a 1990 F-150 (4.9L); while looking over the engine bay, I noticed a clear tube which runs between the parallel air intake tubes. Clearly not an original component...