Thread: clogged catalyist coverter?

Ok, so the GP still has problems starting sometimes. I've changed the CPS and I think this time it may be the catalyic converter. It's had a rattle/grind coming from it for the last 6 months....It's getting harder to start by the day, only sometimes though. Also if i'm on the gas, accelarting very slowly, it seems to have a "pick up" problem and I have to really throw some throttle to it to get my speed to pick up. I'm going to have the plugs changed and if still same issues, just dropping it off at the stealership for a new converter. BTW there is no check engine light either. Just wants to "die" on me sometimes and barely runs sometimes on start-up. what do you guys think?

Cat would make the car run worse the more throttle you give it. Sounds like it could be plugs and wires to me.

Originally Posted by 01GTP

Cat would make the car run worse the more throttle you give it. Sounds like it could be plugs and wires to me.

thats why imma change them first. plus aren't AL 104's only good for about 10k miles? I'm converting straight back to stock this time, 606's all the way...

That could be your problem there, those plugs are too cold for you. They are probably fouling out.

Originally Posted by 01GTP

That could be your problem there, those plugs are too cold for you. They are probably fouling out.

that was mainly what I am coming up with but still doesn't explain the noise coming from under my car. ( the grinding noise )...but maybe the fouled plugs have caused fuel to get into my catalyist conveter, therefore plugging it as well!

OR a heat shield is loose, jack it up and look.

Originally Posted by 01GTP

OR a heat shield is loose, jack it up and look.

hmm... didn't think of that one...

I've got so many projects going, gotta get the Tick perf. Master Cyl. installed in the T/A, my hub assembly needs replacing in the GP, battling H.I.D. harness in the GP and now not to mention both the cars needs their spark plugs changed...Oh yeah still gotta fix that headlight motor in the T/A as well...