Well, the problem is that i seem to be having a problem. Ive got just about no throttle response. all i have is a little past idle then after that its nothing. anyone else ever have this prob and if so WTF caused it!!!

 

check your fuel pressure it could be that you need a fuel pump maybe.

 

Mine acted like that when the injectors went south. The other things that come to mind are a plugged cat or a TPS problem. Hope this helps.

 

Well, i had my fuelpump replaced by pepboys not too long ago (not by choice) and i lost my fuelgauge and the pump whines costantly. Ive got vette injectors waiting for me to install them but i just dont have the $$ to take care of em. Just to clarify when i mean no throttle response i mean literally when i hit the gas it feels like the F.I. is working backwards, absolutely no acceleration @ all. Also having hard starts.

 

Sure sounds like a clogged CAT.....


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86 406

 

i agree...i had the same problem when my cat got clogged...it made almost a whistling noise when i floored it and the car went nowhere.....that'd be my guess....gut that cat or get a high flow one.....hope i could help

 

I has a similar prob, the car ran great as long as you didn't press the gas down to far otherwise it would completly fall on its face (like it was shutting off) until I lifted. Turned out to be a bad ECM

 

Why don't you just install the injectors yourself? Its really very easy. You just remove the plenum, runners, and fuel rails.

Did this problem just happen out of the blue, or did you do something beforehand?

 

I dunno, i got a feeling that its the ECM (just my luck). Now ive got another GTA with a bad motor. same year. now would there be a problem with me usin the ECM from that one just to find out if its the problem??

 

No problem to switch the ecm withthe same year.
But I would get the fuel pressure checked out first cause I had a pump replaced and 2 days later it went bad again! Thank goodnes I took it back right away and got it fixed under warrenty. Just a word of advice.

The other thing I would do is replace the fuel filter. There may have been some dirt or stuff in the tank that was stirred up and clogged the filter alittle. I also had this type of a problem too. It would idle fine but try to accelerate and it wouldn't. It was the fuel filter, it was some how clogged but it was able to pass enough gas to idle and run the car slighty.

Just a few ideas for you to try to check.
Good Luck!

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89 IROC 350 Auto
MSD 6AL
Custom DUAL Exhaust
Edelbrock Performer 6085 Aluminum Heads
ZZ9 Cam
TPIS Level 5 Chip
And Free mods.
(stock intake, runners and suspension)

13.879 @ 98.90 mph (with 2.77 gears!)


Moderator of http://www.iroczone.com



[This message has been edited by Ski89Z28 (edited August 24, 2001).]

[This message has been edited by Ski89Z28 (edited August 24, 2001).]

 

Possible the MAF, mine went south and never posted a code. Just a suggestion though.



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1987 Camaro IROC-Z
350 TPI (L98), HyperTech Airfoil, K&N Filters and modified airboxes, AC Delco RapidFires, Taylor SpiroPro 8mm wires, Energy Suspension polyurethane bushings for front and rear LCAs and sway bars, KYB struts and shocks, BFG g-Force Z-rated tires, MAC STB, MAC SFCs, JET low temp stat, CarSound Hi-flow Cat, DynoMax 3" Mandrel-bent pipes, Flowmaster muffler, 3" chrome tailpipes, Corvette Servo, TransGo Shift Kit, Corvette 2000 Stall, TruCool LPD tranny cooler, T-tops, and White exterior with red leather interior.

2001 Sunfire GT
Bone stock 2.4L, 5-speed, K&N cone filter, interior detailing, 200W Monsoon Sound System (8 speakers), Silver Metallic exterior with grey interior.
3rd Place Stock Class at annual 2001 JCO Bash

Web: http://www.angelfire.com/on3/whitelightening

 

have you cked fuel pressure?New pump doesnt always mean a good pump!If thats ok id be looking at the MAF and stopped upexhaust like a couple of the other guys said

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86 z28 zz4 ssm lift bars ,3.73 simesed runners and a traction deficient 13.707@101.02,on a 2.16 60 ft on 295/50/15 junk street rubber ,best MPH run 13.82@102.7,69 AMX,390 4 speed sticky tires and other stuff..12.94@102.3

 

K, Switched ECM's and fuel Filter.Also switched MAF's from my other GTA which ran fine. after i get the car past 2000 rpm's she acctually has some power. I havent set the TPS or IAC just wondering if this would help if i did. also im picking up a FP tester tomorrow. just wondering what it should read.

 

I just bought a 91 GTA. I had a similar problem. To make a long story short. I traced it down to a bad pick up coil and incorrect timing. To check this leave the ECM hooked up and put a timing light on the car. If the pick up is bad the timing will bounce around at idle. If you give it a little gas and hold it the timing will straighten out.
I put on a new pick up coil along with new wires cap rotor and coil and my buddies were in aw at the power I had found.

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91GTA 5.7liter needs paint, I rebuilt the trans, engine is moded but old

 

well i set my TPS and adjusted my IAC, got a Fuel Pressure gauge and the pump primes at 25 PSI when it should be around 34-50 somethin. im gonna swap the FP from my other car and see if that works. if not then i guess i'll be going back to the auto parts store and watch the parts counter guy's eyes light up from all the way at the end of the store. lol, thank *** my dad just gave me a CC with a $1400 limit on it.