CarrotcarZ

iTrader: (10)

Lets say for example im driving on the highway going about 50. When i got WOT the car jerks violently and doesnt accelerate, like its stuck or something. I've checked EVERYTHING, changed the plugs and the wires, checked the tuning...and still cant find the problem? There's no engine light and sometimes while just driving, the car will stumble horribly. Like I said this only happens when I go WOT while already moving. It doesnt happen if I just mash it from a stop. Any ideas?

orangeapeel

iTrader: (18)

Sounds like you might need to have a tech 2 hooked up and go on a test drive.

smokin00ss

Iam assuming you probably have a ORY. If not there is a slight chance your cats could be clogged. Probably not but hey worth a shot. I had a 91 350 camaro for my first car. The cats were clogged like a bastard, and when I would go WOT the car would hessitate and fall on its face. Just my .02

00TAProject

When was the last time you changed your fuel filter? Maybe your fuel pump is getting ready to **** the bed? 2 things that could cause that......Not enough fuel....

CarrotcarZ

iTrader: (10)

fuel pump is a brand new racetronix and i changed the fuel filter last night and the problem is still there

cav101

iTrader: (10)

sounds like a fuel issue to me.....but if u just changed the pump/filter....check it with a scanner

eamador11

Possible tranny problem? maybe something is not engaging properly at that speed. like its not downshifting as it should under high load.

blue98Z

iTrader: (29)

U could also have a coil going bad. I just replaced eight coils on a vehicle doing the exact same thing. Only thing is if it's a coil going bad the other's aren't far behind it. Just my .02.

CarrotcarZ

iTrader: (10)

Could it possibly be something like the crank pos. sensor?

2xLS1

iTrader: (25)

Yes. Fixed a car once doing the same thing. Seems the owner had tried to repair the wires going to the CPS after they got burned on SLP headers and did a poor job. The car would start and run fine until about 4K rpm, then would break up bad. Bought the replacement CPS harness/plug and spliced it in and the problem was fixed. I'm not saying it is your wiring, but if the wiring going to the CPS could cause it, so could the sensor. Took a while to figure out as the owner did not tell us what he had done. We stumbled on to it after exhausting all other possibilities.