Thread: Exteemly sluggish

Hey guys.. I've read a lot on here trying to see if anyone has the same trouble that I've had over the last few days.. I think I know what it is but figured I'd ask..

2002 GP GT 3.8 car has zero power right now.. no codes flashing

While at idle
she idles perfect, give it more than 2000 RPM and it'll start bogging bag and start running very lean.. sounds like it's almost starving for fuel or it can't exhale..

While driving.. zero power at all.. if I give it more than the 2000 RPM mark, it actually revs up but starts bogging bad and will not go past 4000 RPM, no bucking, and looses power and speed bad... It takes me about 1-2 miles to get up to highway speed and it's impossible to stay there when I come to a hill..

So far I replaced the MAF and MAP.. no change..
Checked air filter..clean.. actually pulled it off and no change either
Changed fuel filter.. lots of flow and pressure

I'm puzzled...

I'm thinking after reading other posts on here that it might be a plugged Catalytic Con. or a vaccuum leak..
What do you guys think

Rob

Thanks for the reply... the car has 142000kms on it
I did not look at the cat after I got home as I didn't realize or know what to look for..

This did just happen pretty quick.. I was on my way home from work and bingo, it started and hasn't stopped since..

I'm going to get the exhaust taken apart ahead of the cat when the service station opens again and then try it out... I don't have the gear here to burn the clamps off so I'll have to wait.but it's worth it to try..

I ask since I'm not very mechanically knowledgeable with these things.. what is the benefit of removing the "U-bend" ?
more flow?

Way more flow, more power. Its very restrictive. I GOT A UBEND AND CAT DELETE WITH MY DOWNPIPE AND IT DID WONDERS ON MY GTP. I dont see why gm made the gp with it.

I had a similar problem with my Dakota once. There was a wire broke off the O2 sensor. It was dumping LARGE amounts of fuel in and trapping it in the Cat. After replacing the O2 sensor and putting a Magna Flow high flow Cat on it all was well again.
if you try driving your car at night, set up some ramps so you can get a good luck under it when you return. Drive your car right up onto the ramps (power permitting) and you will see it glowing if thats the issue. you can't miss it...

Good idea... I'll take it for a ride after dark tonight ..

Took it for a very sluggish ride tonight and no "Glow".. plus a buddy of mine held his hand over the exhaust and said the flow seemed fine..

I'm stumped...

I'll give that a try when I get home after work and get it in a garage on the stands again

About 2 minutes with a Sawzall