My car is running horrible under heavy throttle.

[eDoog]

So I was driving home last sunday and noticed a very loud whine. About 5 minutes later I heard something hit the underside of my car very hard so I pull over to look under the hood to realize the pulley for the cerpentine belt underneath the alternator fell off! I drove home and took it to Pep Boys the next day and they replaced the belt and the pulley. I should mention that for the last 2 months I had my SLP CAI in and I took it out the day this happened but my car ran fine.

So here's the problem. I got my car back from Pep boys and noticed that it was running horrible. When I take off from first gear, it feel slike it misses a little at low RPM (righ below 2K) and if I give it more than 1/4 throttle, I feel the engine bogging, it sputters and the car barely accelerates. This will happen in any gear if I go WOT. So today I bought some Red Line injector cleaner and poored half a bottle in a long with a tank of 91 chevron and it honestly runs a hell of a lot better, but it's still occurring.

My question is, is it possible that my computer is still adjusting to the stock intake? THat's the only reason why I think my engine would bog down like this. Also, it seems to be getting a LITTLE better the more I drive so I feel the comp. might be adjusting more and more.

Any input will be greatly appreciated.

[Snuffalofogus]

plugs, wires, coils, ICM

[FlamespikeMST1]

or a plugged cat
for testing of that cat, hit it with your fist or hammer, and listen for rattling
or dissconnect the flowmaster catback and inspeck with a flashlight and stick a large screwdriver in there and rattle away, just dont break anything [img]smile.gif[/img]

[eDoog]

If it was exhaust related, wouldn't I be feeling it all of the time? I think it feels more like a missing cylinder. I think I just don't notice at high rpm because the engine is spinning so much faster.

[LwnGy83]

Sounds like coils to me. That is common when a coil goes bad. I'd also check plugs and wires while you're at it. Start there. I doubt it's your new intake.

[99v6cam]

coils, wires, plugs, those are usually what cause that. when you go WOT you prolly hear it misfire (loud popping).

[FlamespikeMST1]

and no, my problem happened only during WOT
i only threw this in for good measure since you can never be too sure anyways
besides whats 80 bucks for cat and install

[eDoog]

How much does it cost to check/replace coils?

[mike h]

Originally posted by eDoog:
How much does it cost to check/replace coils?

i want to know too

[BirdOnFire]

My car feels the same way at WOT, but not all the time? i just changed the plugs and wires, i put taylor spiro pro wires and NGK tr55-IX plugs in, but that didn't seem to help, so im going replace my coils with the MSD coils next.

[FunkZ]

Hrm, so let me get this straight. You take a perfectly good running car to Pep Boys to replace a pulley and belt and get it back running like dog ****...

I know where I'd be headed right about now.

[Camaro2k]

$20 bucks a pop for coils (x 3). install aint that hard oce you get the right tools to get in there and unscrew the 2-3 screws. dealership charges about a 100 buckaroos per coil .. damn bastards

[eDoog]

$20 a coil? That's awesome. And FunkZ, trust me I drove it right back after I picked it up and left it there for 2 days and they couldn't find anything. They're idiots, if it the problem isn't throwing a code, they can't tell you what's wrong because they're all just kids right out of highschool. How much would labor be to install the new coils because I probably don't have the proper tools to change them.


Also, where can you get coils besides the dealership? Would Autozone have those?

[BirdOnFire]

Full throttle performance sells accel and msd coils. http://www.ftpp.net./index.html

[eDoog]

Are they the regular voltage as the stockers? I'm selling my car and I don't want to get coils that will have a bigger spark. Thanks for the suggestion either way.