runs rough after the cam and heads

93hatch · July 9th, 2008, 03:48 AM

switched to my gt40ps and trickflow stage 1 cam car revs really good when in neutral but under load it seems kinda rough, and lacking the power it should have, any suggestions? i think i need a adjustable fpr

e3sean · July 9th, 2008, 04:54 AM

i have one for sale 50.00 plus shipping lol

1slo5.0 · July 9th, 2008, 07:43 AM

Originally Posted by 93hatch

switched to my gt40ps and trickflow stage 1 cam car revs really good when in neutral but under load it seems kinda rough, and lacking the power it should have, any suggestions? i think i need a adjustable fpr

Adjusting fuel pressure will do nothing for this problem. Check to make sure the firing order is right. Also check the timing and make sure the spout is out when you check it. I'd set the timing to 14 or 15 degrees and see how it runs. Is the cam timing correct? Are there any vacuum leaks?

93hatch · July 9th, 2008, 01:48 PM

im almost positive the cam timings correct, my friend set my timing to 12 degrees too, revs up fine and sounds good in neutral just kinda rough otherwise

Sleeper_Stang_89 · July 9th, 2008, 03:35 PM

Its not misfiring is it? fouled plug... arched plug wire?

93hatch · July 9th, 2008, 05:03 PM

Originally Posted by Sleeper_Stang_89

Its not misfiring is it? fouled plug... arched plug wire?

sounds like its missfiring, im gona replace the plugs next i think, put an 89 ecu in it today to see if it was the cobra one resisting the cam, no change

White Thunder · July 9th, 2008, 05:15 PM

process of elimination is the only way bro

Sleeper_Stang_89 · July 9th, 2008, 05:37 PM

I had sort of the same type of problem mine ended up being... on one of the plug wires i didnt bend it like I was supposed to and it just touched a hot header... also my dizzy cap was bad... I took it to my tuner after I replaced the plug wire and he put it on the dyno and done his thing... I ended up having to leave it overnight and he stayed after hours fixing my problem... he ended up replacing my dizzy cap with his spare shop one and mine has run soo damn good since then... I initially thought vacuum leak though...

93hatch · July 9th, 2008, 06:02 PM

^thanks man, im starting to think its something ignition related, ill go look at my cap an dmake sure my wires arent touching anything

1slo5.0 · July 9th, 2008, 08:04 PM

Originally Posted by 93hatch

sounds like its missfiring, im gona replace the plugs next i think, put an 89 ecu in it today to see if it was the cobra one resisting the cam, no change

What injectors are in it?

e3sean · July 9th, 2008, 08:31 PM

24lb

1slo5.0 · July 9th, 2008, 08:42 PM

And is the mass air meter from a Cobra or designed for a Cobra?

e3sean · July 9th, 2008, 09:02 PM

it is from a cobra

93hatch · July 9th, 2008, 10:14 PM

cobra maf now and 24lb injectors with the 89 computer, just put a new cap and rotor it seems to have helped a bit, my friends gona do the plugs tomorrow and bump the timing from 12 to 14 degrees

93hatch · July 9th, 2008, 10:46 PM

if that doesnt work i think im gona buy a pro-m maf for the 24lb injectors

93HatchsBFF · July 12th, 2008, 11:20 AM

Yeah i did the spark plugs yesterday gapped the .44
and did the time to 14 degrees anymore i think it will start detonating.
i took it out after it still sputter a lil bit but still lacking the power but when im at a stop it smells bad like it's just dumping fuel into the block and it's going threw gas like crazy so i think it's running rich cuz of the cobra MAF in it Bcuz it doesn't have a meter in it?

Bigfatts · July 12th, 2008, 12:04 PM

And is the mass air meter from a Cobra or designed for a Cobra?

Would that make a difference?

Have you looked at the distributor itself? I had a similar problem and ended up replacing my coil/wires/cap and rotor/plugs just to find out it was the distributor. The magnetic pickup was just rattling around inside it. Looked and felt fine when we took the cap off and checked it but when we got it out parts started rattling and falling out. Replaced it and the car runs awesome.

1slo5.0 · July 12th, 2008, 12:51 PM

Originally Posted by Bigfatts

Would that make a difference?

Yes. The Cobras calibrate the injector size the correct way......in the computer. The mass air isn't "calibrated" for 24lb injectors, the computer is. If you have a Cobra computer and are using a mass air meter that is calibrated for 24lb injectors for an A9L or equivalent computer you will possibly run into driveability issues. The same applies if you use an A9L or equivalent computer with a Cobra mass air meter and 24lb injectors.

Bigfatts · July 12th, 2008, 01:29 PM

Thanx Darrell, guess I need a Cobra computer for that MAF I picked up then.

e3sean · July 12th, 2008, 01:29 PM

when i rode in it it just seemed to be really laggy like it wasnt getting proper fuel.

July 9th, 2008, 03:48 AM	#1
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	runs rough after the cam and heads switched to my gt40ps and trickflow stage 1 cam car revs really good when in neutral but under load it seems kinda rough, and lacking the power it should have, any suggestions? i think i need a adjustable fpr __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

July 9th, 2008, 04:54 AM	#2
e3sean I Post Entirely Way Too Much 1988 lx 9.68@142 Join Date: Nov 2007 Location: goldsboro NC Posts: 5,609 iTrader: 0 reviews	i have one for sale 50.00 plus shipping lol __________________

July 9th, 2008, 01:48 PM	#4
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	im almost positive the cam timings correct, my friend set my timing to 12 degrees too, revs up fine and sounds good in neutral just kinda rough otherwise __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

July 9th, 2008, 06:02 PM	#9
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	^thanks man, im starting to think its something ignition related, ill go look at my cap an dmake sure my wires arent touching anything __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

July 9th, 2008, 08:31 PM	#11
e3sean I Post Entirely Way Too Much 1988 lx 9.68@142 Join Date: Nov 2007 Location: goldsboro NC Posts: 5,609 iTrader: 0 reviews	24lb __________________

July 9th, 2008, 08:42 PM	#12
1slo5.0 MM Ninjas! 1990 Mustang LX 9.36@143 mph Join Date: Jan 2006 Location: North Fond du Lac, Wisconsin Posts: 11,375 iTrader: 1 reviews	And is the mass air meter from a Cobra or designed for a Cobra? __________________ My daily driver has 16 cylinders and 4400hp @ 1000 rpm.... ***1988 Mustang GT - Stock....almost

July 9th, 2008, 09:02 PM	#13
e3sean I Post Entirely Way Too Much 1988 lx 9.68@142 Join Date: Nov 2007 Location: goldsboro NC Posts: 5,609 iTrader: 0 reviews	it is from a cobra __________________

July 9th, 2008, 10:14 PM	#14
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	cobra maf now and 24lb injectors with the 89 computer, just put a new cap and rotor it seems to have helped a bit, my friends gona do the plugs tomorrow and bump the timing from 12 to 14 degrees __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

July 9th, 2008, 10:46 PM	#15
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	if that doesnt work i think im gona buy a pro-m maf for the 24lb injectors __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

July 12th, 2008, 11:20 AM	#16
93HatchsBFF Hardcore Enthusiast 1989 LX 12.60 at 109mph Join Date: May 2008 Location: Obamastan, AZ Posts: 1,254 iTrader: 0 reviews	Yeah i did the spark plugs yesterday gapped the .44 and did the time to 14 degrees anymore i think it will start detonating. i took it out after it still sputter a lil bit but still lacking the power but when im at a stop it smells bad like it's just dumping fuel into the block and it's going threw gas like crazy so i think it's running rich cuz of the cobra MAF in it Bcuz it doesn't have a meter in it? __________________ 1989 LX mustang, 5speed, 108,xxx miles, Mac Longtubes, BBK midpipe, Paxton Novi 1000 6psi, Crappy FMU with 19lb injectors, 373 gears soon to come 30lb injectors, Blow through MAF, intercooler and tune

July 12th, 2008, 01:29 PM	#19
Bigfatts Regular Badass Mother 3000 Twice as fast as your ass! Join Date: Apr 2008 Location: Lutz, Florida Posts: 234 iTrader: 1 reviews	Thanx Darrell, guess I need a Cobra computer for that MAF I picked up then.

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