When I put the pedal to the metal the car hesitates and then will take off. It feels like the TPS is not fast enough and the the computer finally gets the info and then injects fuel. How can I fix this problem?

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'89 Formula 383 TPI

 

I have the same problem, I need help too!!! Could it be a loose timinig chain that causes the delay?

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86 Tramaro 90% Trans Am/ 10% IROC/Z (nose, hood,& fenders)
Trans Am Mods as of 1/10/01
3inch
T.E.S/Flowmaster setup,gutted cat,gutted maf,relocated mat,373 gears,upgraded factory chip,255 liter h/press. walpro f/pump & throttle body coolant bypass
njdaewoo@excite.com

 

i have the same prob ive tried everything to fix it helpppp

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1992 camaro RS
195cc AFR heads with compition port work milled to 58cc "10.9 to 1 compression"
373 10 bolt rearend
ssm sfc's
87 350 TPI
bored 30 over
compucam 2032 with 1.65 full roller rockers
497-510 LIFT 214-220 duration
msd6AL
1 5/8 headman headers
2 `1/2 flowmaster exuast
k&n filters gutter air box gutted maf"no fins no screens"
3 pc under drive pulleys
no emissions no egr etc
custom ED Wright chip
eddelbroc intake base and runners ported plenum
accel 8.8mm wires
B&M mega shifter
gutted maf/airbox
hotchkis lower control arms
3" exhuast cutout
homemade cold air intake
2000 tci stall
700R4 with B&M shift kit edelbrock water pump
new best ET 13.5 @104.66
no times with new afr heads hoping for 12's on motor
Nos to be installed soon

 

When did you guys first notice the hesitation? I didn't have the hesitation until I switched to the MiniRam w/58mm throttle body. Wonder if I should raise the TPS but lower the fuel pressure a little so that it can respond quicker but still be getting the same amount of fuel.

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'89 Formula 383 TPI

 

Had the same prob but it was tolerable by raising the voltage up over .6v but less than .63v (or it will trigger CES)

I now got a custom prom and dropped the voltage back where it should be. Better off getting a prom because you will not have enough enrichment, but idle and top end will be too rich.

If it's a stock setup then something else is wrong.


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'88 Camaro RS 2.8L
'88 Formula 350 (Too many mods to list...)

 

I do have a custom prom for the set-up though. Do you think that the prom needs more work?

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'89 Formula 383 TPI

 

Raise your TPS voltage, mine is at .62, anthing higher, and I set off a code. Also, try advancing your inital timing.

 

Also, while my car is in neutral if I snap the throttle open I can hear the valves , then there is a hesitation & the engine picks up strong! What the hell is going on!

 

did you guys ever think that it maybe clogged injectors/fuel filter?

 

no ive got new injectors

 

I have the same problem but only when i'm driving in town. The stop and go traffic. You start give it gas and loses power and then wham it takes off. I can't figure it out. Checked the timing and it's good the inj are cleaned every 6 months and engine tuned. I'm just starting to notice this. I have 115,000 miles on mine and it still runs like new. Everything is stock except ignition. I'd like to get rid of it myself. Any other suggestions?

 

You say you checked the timing, but what is it at? Try setting it at 10 or so if it isn't already and see if it helps. Mine and a friend's did the same thing till we bumped the timing some, both run great now. Just a thought.

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'87GTA w/ SLP Cold Air, MSD Coil, Airfoil, Gutted MAF, AFPR, TES Headers, HI-FLOW CAT, Flowmaster Catback, Energy Suspension Master Bushing Kit