Hesitation off idle

T

tm95gt

New Member

Jun 24, 2005

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Jun 24, 2005

#1

• Jun 24, 2005

• #1

I have recently replaced the head gasket on my 95gt, everything seemed to
be fine. After I finished it the car seemed to hesitate off idle, full throttle was
alright. Now it stalls at stop lights, and the idle surges. I noticed that when
I hold the throttle steady at about 2,000 rpm it seems like it's missing. All of
the ignition components are new, including the distributor and the plugs.
I have also retorqued the lower and upper intake, just to make sure there
were no leaks. Any ideas?!

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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Jun 24, 2005

#2

• Jun 24, 2005

• #2

Welcome!

Any codes?

Did you reset the idle/TPS, etc? If so, I would go through and check the idle settings.
I would cruise through this write up and see how it does.

http://www.muscularmustangs.com/iac.php

Good luck.

 

T

tm95gt

New Member

Jun 24, 2005

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Jun 24, 2005

#3

• Jun 24, 2005

• #3

I tried pulling codes,but the cars idle is
all over the place and it stalls in the
middle of testing. It's not working to well.
Also when it gets hot it will not start unless I put the pedal to floor. It will start
fine in the morning, but if I drive it for about a half hour it won't start,it will just keep turning over but won't start.

 

crazyhorsegt

Founding Member

Oct 27, 2001

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tn

Jun 24, 2005

#4

• Jun 24, 2005

• #4

thank's, that may be my problem, i just put a 65mm t/b on my 5.0, it bog's down bad when i mat it, then it roll's, i will try your fix, thank's again.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

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Jun 25, 2005

#5

• Jun 25, 2005

• #5

TM, do you have mods to the car? Flooring the pedal cuts the injector pulse and clears a flood condition. It sounds like you are rich (a lot of guys with 30# injectors and H/C/I's have to do this for hot starts if they dont have a tune).

Good luck.

 

dstanggt50

Founding Member

Sep 13, 2000

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Woodinville, WA

Jun 25, 2005

#6

• Jun 25, 2005

• #6

tm95gt said:

I tried pulling codes,but the cars idle is
all over the place and it stalls in the
middle of testing. It's not working to well.
Also when it gets hot it will not start unless I put the pedal to floor. It will start
fine in the morning, but if I drive it for about a half hour it won't start,it will just keep turning over but won't start.

Click to expand...

I would chk koeo codes first, if no codes pull up, then if you have an adjustable fpr, I would try lowering it first, if it doesn't work, try increasing it to get it to idle a little better so you can do the koer test.

 

T

tm95gt

New Member

Jun 24, 2005

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Jun 25, 2005

#7

• Jun 25, 2005

• #7

I have the following mods; gt40x heads,E-cam,36#inj.,powerdyne 6# blower,roller rocker 1.7, chip tuned on dyno, cobra upper,lower intake,long tubes,complete exhaust. The car ran perfect, except for
a cold start problem that developed out of nowhere. The fix was the stator in the distributor, which I figured out after
checking and changing just about everything related,including the distributor. Not to get side tracked, I reassembled the car,adjusted the valves
according to specs. My car hesitates off idle, and stalls and also at WOT it feels like I've lost about 100 hp.