Have any ideas?

[J3$$3]

I just bough a 98 firebird convertible about 2 months ago and have had nothing but trouble with it. anyways, It was running rough, missing, so I got new plus and wires, ran worse, replaced the coil pack, ran even worse. anyone have any guesses? plugged cat or oxygen sensors maybe? It wont run long enough to make it out of the driveway.

[Rob Bell]

Re: Have any ideas?

Make sure you don't have the plug wires mixed up. I did that on my wife's van and felt like a moron when I took it to the dealer and they told me the problem. It's easier to mix them up than you think.

[J3$$3]

Re: Have any ideas?

I took it to the shop to have them put plugs and wires on it, and the mechanc who worked on it told me it was probably the cil pack, so I changed all that myself and triple checked that all the wires were in the right spots. It just feels like it builds up pressure to the point where it wont even drive. I'm just gonna cut the cat off and see what happens.

[vr4gasm]

Re: Have any ideas?

we had a horrible miss changed plugs wires coil pack icm nothing helped it... i gutted the cat and changed the fuel filter at the same time cleared right up not sure which of the 2 that is was that fixed it but you might wanna try the fuel filter since its a 7$ part if not gut the cat.

[Mogobs30th]

Re: Have any ideas?

Scan it first, see what codes are popping. That'll give you a decent idea of what is happening. Throwing parts at a car isn't going to help.

[SixShooter'00Camaro]

Re: Have any ideas?

pluged up cat??

[J3$$3]

Re: Have any ideas?

It has 2 engine misfire codes and 2 emissions codes. I bought a new fuel filter tonight and I'll put it on in the morning and see what happens.

[ssms5411]

Re: Have any ideas?

Vacuum leak maybe or the CAT, feel the exhaust if you get it started to feel if there is exhaust coming out.

[J3$$3]

Re: Have any ideas?

It could be a vacuum leak, but it idles like a stiff-motor-mounted 572 with the worlds biggest loppy cam.

[ssms5411]

Re: Have any ideas?

Make sure the passenger side vacuum hose is on the TB should look like a boot, it would throw a Evap emisson code if it was off also, trace that line to the evap box to see if any leaks, pass. side of TB and goes down behind the Alt.

[J3$$3]

Re: Have any ideas?

I know that vac line is hooked up because I had to replace it because it was broke in half, and then duct taped back together.

[ssms5411]

Re: Have any ideas?

I would double check it or put a good line on it for a couple of bucks instead having duck tape on their because it could be leaking.

[J3$$3]

Re: Have any ideas?

It is a new line, whoever owned the car before did a HORRIBLE job of keeping up with it. :(

[ssms5411]

Re: Have any ideas?

Might want to check the map sensor line and the line going to the FPR behind the engine to rule out all the Vac. lines.

[J3$$3]

Re: Have any ideas?

I took it back to the shop, all the codes are gone except for the random cylinder misfire, I explained to the guy what all I did, and he said that it has to be the control module that the coils sit on top of and plug into. So there goes another $130.