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Engine tune

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Josh Jones
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Joined: Thu Dec 27, 2012 9:36 pm
Location: Amurca

Engine tune

Post #1 by Josh Jones » Mon Apr 08, 2013 7:21 pm

First off let me say, it's nice to be back! I lost my job and am now employed once again.

I have been tinkering with my 300, so let me update you.

New 1980 model carb.
Duraspark distributor
Msd 6al ignition, street blaster coil
new fuel pump

My question; I set my base timing at 10 degree but I'm getting a lot of pinging. Go back and adjust the base to 5 degrees, it's better but not all gone. Vacuum gauge is reading 9lbs max. I have tried ported and manifold vacuum.
Image
1984, Ford, F150, 4x4, Rc, SB, 4.9 L6 Engine, Np435 Transmission, Np208F Transfer Case, "Little Red"
1994, Ford, F150, 4x4, RC, SB, 521cu BBF Engine, C6 transmission, Cyclone 10" Billet Quick Change Gear Box. "Honey Bunny"

Josh Jones
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Posts: 171
Joined: Thu Dec 27, 2012 9:36 pm
Location: Amurca

Re: Engine tune

Post #2 by Josh Jones » Mon Apr 08, 2013 7:25 pm

Just ignore the loose wires for right now. I'm putting in some Autometer gauges I had laying around.
1984, Ford, F150, 4x4, Rc, SB, 4.9 L6 Engine, Np435 Transmission, Np208F Transfer Case, "Little Red"
1994, Ford, F150, 4x4, RC, SB, 521cu BBF Engine, C6 transmission, Cyclone 10" Billet Quick Change Gear Box. "Honey Bunny"

Baron Von Ottomatic
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Re: Engine tune

Post #3 by Baron Von Ottomatic » Mon Apr 08, 2013 9:55 pm

Nine inches of vacuum is very low, normal at idle should be ~20". Check the intake manifold and carb mounting gaskets for leaks, then plug and check each vacuum line/port individually.

BIG 6 farmer
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Location: On a dirt road near Washington Nebr.

Re: Engine tune

Post #4 by BIG 6 farmer » Mon Apr 08, 2013 11:08 pm

Yes on the low vacuum. a leak that big would lean out your fuel mixture. That would cause your pinging under load.
83 F 150 SB 4x4 300 six NP 4speed - - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) -

Josh Jones
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Location: Amurca

Re: Engine tune

Post #5 by Josh Jones » Mon Apr 08, 2013 11:41 pm

I will have to check for leaks again, I thought I got them all sealed.

I'm afraid the erg valve is leaking exhaust into the intake. Reason being, if I let off the gas and coasted without pushing in the clutch the exhaust would burble and push every vacuum plug off. I thought I had it fixed, but it must have burned through the gasket and sealant.

Note: I can really hear the pcv valve working, I can hear the little rattle over the engine. I know it must be pulling a ton of vacuum.
1984, Ford, F150, 4x4, Rc, SB, 4.9 L6 Engine, Np435 Transmission, Np208F Transfer Case, "Little Red"
1994, Ford, F150, 4x4, RC, SB, 521cu BBF Engine, C6 transmission, Cyclone 10" Billet Quick Change Gear Box. "Honey Bunny"

BIG 6 farmer
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Joined: Sun Dec 30, 2012 12:46 am
Location: On a dirt road near Washington Nebr.

Re: Engine tune

Post #6 by BIG 6 farmer » Tue Apr 09, 2013 12:41 am

You got some crazy stuff goin on. :bang: Have you concidered an exorcisim ? Sounds like you might have an exhaust restriction ? Bad Converter or muffler ? That would cause low vacuum, & blowing hoses off the intake manifold.
83 F 150 SB 4x4 300 six NP 4speed - - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) -

apg camo
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Re: Engine tune

Post #7 by apg camo » Tue Apr 09, 2013 11:20 am

I'm with big6, sounds like you have an exhaust restriction. I'm betting on the cat.

Josh Jones
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Location: Amurca

Re: Engine tune

Post #8 by Josh Jones » Tue Apr 09, 2013 12:39 pm

The truck doesn't have a converter but it does have some old exhaust tubing. I put a factory exhaust system off a 2010 F150 I had laying around.
I'm about to install a new HD truck manifold and new exhaust system though.
1984, Ford, F150, 4x4, Rc, SB, 4.9 L6 Engine, Np435 Transmission, Np208F Transfer Case, "Little Red"
1994, Ford, F150, 4x4, RC, SB, 521cu BBF Engine, C6 transmission, Cyclone 10" Billet Quick Change Gear Box. "Honey Bunny"

Josh Jones
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Posts: 171
Joined: Thu Dec 27, 2012 9:36 pm
Location: Amurca

Re: Engine tune

Post #9 by Josh Jones » Tue Apr 09, 2013 9:22 pm

I can't imagine the exhaust being choked. It apears to be 1-3/4" pipe to the transmission. The rest is 2010 F150 exhaust and muffler. I checked all my vacuum plugs and they seem to be fine.

With the base timing set at 5 it only pings under WOT and when it's under a load. It's a very strange deal, it's almost like the mechanical timing is off "or something".

Hopefully I'm going to replace the cylinder head, intake manifold, camshaft, timing gears and valve train come soon. I still have the 60mm turbo and blow thru carb to install. Kinda on the fence if I want to go through with the turbo. I have all ready money invested into it, so I feel obligated now.
1984, Ford, F150, 4x4, Rc, SB, 4.9 L6 Engine, Np435 Transmission, Np208F Transfer Case, "Little Red"
1994, Ford, F150, 4x4, RC, SB, 521cu BBF Engine, C6 transmission, Cyclone 10" Billet Quick Change Gear Box. "Honey Bunny"

1986F150six
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Location: Northwest Alabama

Re: Engine tune

Post #10 by 1986F150six » Wed Apr 10, 2013 11:11 am

Just an idea... it is hard to understand pinging with the initial timing set @ 5 degrees BTDC, as you now have it. Your vacuum is so low... hmm? Is it possible that your harmonic balancer has slipped? That would give you false or inaccurate timing figures.

How about setting your timing at idle by using the vacuum gauge. Adjust until you have the maximum vacuum [most likely ~19-20"]. Then go for a test drive. You might have to retard the timing a little if pinging occurs.

My 1986 [duraspark conversion w/o EGR] pulls 20.5" and I set it @ 19.5". At 20.5", the initial timing of my particular engine is ~14 degrees BTDC.

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StrangeRanger
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Re: Engine tune

Post #11 by StrangeRanger » Wed Apr 10, 2013 11:41 am

First things first
Before you do anything with the timing 9or anything else) make sure there are no vacuum leaks
1996 F-150 (tow missile)
1993 Mustang 5.0 (hot rod and auto-x monster)
1982 Tiga Formula Ford (SCCA racecar)
2013 Hyundai Elantra Coupe (daily driver)

Josh Jones
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Location: Amurca

Re: Engine tune

Post #12 by Josh Jones » Wed Apr 10, 2013 7:20 pm

1986F150six wrote:Just an idea... it is hard to understand pinging with the initial timing set @ 5 degrees BTDC, as you now have it. Your vacuum is so low... hmm? Is it possible that your harmonic balancer has slipped? That would give you false or inaccurate timing figures.

How about setting your timing at idle by using the vacuum gauge. Adjust until you have the maximum vacuum [most likely ~19-20"]. Then go for a test drive. You might have to retard the timing a little if pinging occurs.

My 1986 [duraspark conversion w/o EGR] pulls 20.5" and I set it @ 19.5". At 20.5", the initial timing of my particular engine is ~14 degrees BTDC.


I've tried everything I know to do to get the vacuum up. I'm going to mess with it some more this evening.
1984, Ford, F150, 4x4, Rc, SB, 4.9 L6 Engine, Np435 Transmission, Np208F Transfer Case, "Little Red"
1994, Ford, F150, 4x4, RC, SB, 521cu BBF Engine, C6 transmission, Cyclone 10" Billet Quick Change Gear Box. "Honey Bunny"

Josh Jones
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Posts: 171
Joined: Thu Dec 27, 2012 9:36 pm
Location: Amurca

Re: Engine tune

Post #13 by Josh Jones » Wed Apr 10, 2013 8:43 pm

Ok,,,, I feel stupid.

Went back and checked the vacuum at the manifold vacuum tree. 19" of vacuum, I guess what I thought was manifold vacuum on the base of the carb wasn't. Cleaned the timing pointer and took a better look and re-adjusted. Runs like a top now!

Checked for vacuum leaks and none was found. I also checked the spark plugs and after looking at them I knew the timing had to be retarded and bad lean.

Image
1984, Ford, F150, 4x4, Rc, SB, 4.9 L6 Engine, Np435 Transmission, Np208F Transfer Case, "Little Red"
1994, Ford, F150, 4x4, RC, SB, 521cu BBF Engine, C6 transmission, Cyclone 10" Billet Quick Change Gear Box. "Honey Bunny"

BIG 6 farmer
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Location: On a dirt road near Washington Nebr.

Re: Engine tune

Post #14 by BIG 6 farmer » Thu Apr 11, 2013 6:00 pm

It happens to us all, thats how you learn. Look at it this way, you didnt let your ego get in the way. You asked for input from others here. That goes a long way to solving a problem :nod: :thumbup: :thumbup:
83 F 150 SB 4x4 300 six NP 4speed - - 1950 IHC L162 (1&1/2 ton?) - 87 & 88 T-Bird Turbo Coupes - 2000 Triumph Tiger , 76 Honda GL 1000 , & other toys and parts (& junk) -

Josh Jones
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Posts: 171
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Location: Amurca

Re: Engine tune

Post #15 by Josh Jones » Fri Apr 12, 2013 1:09 am

Good news to report!

The truck had been getting 9-10 mpg with the tfi ignition running in limp mode. I filled it up this morning and calculated 14mpg!!! (The fuel gauge doesn't work so I just fill up every 100 miles.)

Fuel gauge is my next project, along with the water and oil gauge. The water and oil pressure gauge went through the computer and now that I removed all that stuff I think it would be easier to just add the aftermarket gauges. Besides, I had someone tell me the factory oil pressure light won't come on until it reads bellow 7lbs.
1984, Ford, F150, 4x4, Rc, SB, 4.9 L6 Engine, Np435 Transmission, Np208F Transfer Case, "Little Red"
1994, Ford, F150, 4x4, RC, SB, 521cu BBF Engine, C6 transmission, Cyclone 10" Billet Quick Change Gear Box. "Honey Bunny"

Josh Jones
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Posts: 171
Joined: Thu Dec 27, 2012 9:36 pm
Location: Amurca

Re: Engine tune

Post #16 by Josh Jones » Fri Apr 12, 2013 1:22 am

BIG 6 farmer wrote:It happens to us all, thats how you learn. Look at it this way, you didnt let your ego get in the way. You asked for input from others here. That goes a long way to solving a problem :nod: :thumbup: :thumbup:


Well, I'm here to be apart of the forum and it doesn't help no one if I don't listen to others. Now,,, I will get a wild hair in my head and be bound, determined to try something at times. Sometimes I feel like I have to try it myself!
1984, Ford, F150, 4x4, Rc, SB, 4.9 L6 Engine, Np435 Transmission, Np208F Transfer Case, "Little Red"
1994, Ford, F150, 4x4, RC, SB, 521cu BBF Engine, C6 transmission, Cyclone 10" Billet Quick Change Gear Box. "Honey Bunny"

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THE FRENCHTOWN FLYER
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Re: Engine tune

Post #17 by THE FRENCHTOWN FLYER » Fri Apr 12, 2013 4:57 pm

Josh Jones wrote:
BIG 6 farmer wrote:It happens to us all, thats how you learn. Look at it this way, you didnt let your ego get in the way. You asked for input from others here. That goes a long way to solving a problem :nod: :thumbup: :thumbup:


Well, I'm here to be apart of the forum and it doesn't help no one if I don't listen to others. Now,,, I will get a wild hair in my head and be bound, determined to try something at times. Sometimes I feel like I have to try it myself!


To quote humorist/philosopher Will Rogers:

"Some men learn by listening.
A few men learn by reading.
The rest have to piss on the electric fence for themselves."

Been there.
FORD 300 INLINE SIX - THE BEST KEPT SECRET IN DRAG RACING

Harte3
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Re: Engine tune

Post #18 by Harte3 » Fri Apr 12, 2013 6:42 pm

:thumbup:
'83 F150 300, 0.030 over, Offy DP, Holley 4160/1848-1 465 cfm, Comp Cam 260H. P/P head, EFI exhaust manifolds, Walker Y Pipe, Super Cat, Turbo muffler, Recurved DSII, Mallory HyFire 6a, ACCEL Super Stock Coil, Taylor 8mm Wires, EFI plugs.

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woodbutcher
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Re: Engine tune

Post #19 by woodbutcher » Sat Apr 13, 2013 8:23 pm

:rolflmao: :rolflmao: Hi FTF.The third line says it all.INCLUDING ME.Hehehehe.Me thinks that includes about 80% of the human race.
Good luck.Have fun.Be safe.
Leo
"People never lie so much as after a hunt,during a war,or before an election".
Otto von Bismarck

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