Thread: 04 Comp G prob

Any mods?

How long did it take to reach 138mph??

Like 2 years???????????????????????????

There is no reason to ever pass 110-120mph, the stock transmission is not built for that, shifting into 4th gear at such speeds is just asking the trans to implode.


If the car is still bucking and acting like it doesnt want to go, I'd say you still have a misfire going on. What spark plugs did you use??

Do you have a SES for not having a cat converter now?? Because that can cause issue's aswell.

If you git rid of your cat the O2 sensors might be going bad.

Noobs thinking gp's are rackars

GP's where in NASCAR.

Everyone thinks their racekars

No more mods than you have and you thought the cat removed would show a difference?

his car is doing the exact same thing as mine. Its not shifting into 4th. Im starting to think its torque converter but not really sure.

Originally Posted by Ginseng

his car is doing the exact same thing as mine. Its not shifting into 4th. Im starting to think its torque converter but not really sure.

But your complaint isnt about trying to reach speeds that double the posted limit.

He can't go WOT past 80-90 mph because of the surging/bucking from what I gather.

Sounds ignition related to me, because if it was the transmission he'd be seeing more problems even at lower speeds during normal driving.

Originally Posted by Fivefingerdeathpunch

But your complaint isnt about trying to reach speeds that double the posted limit.

He can't go WOT past 80-90 mph because of the surging/bucking from what I gather.

Sounds ignition related to me, because if it was the transmission he'd be seeing more problems even at lower speeds during normal driving.

His issue is the EXACT thing my car is doing and started happening shortly after removing torque managment from the car (his zzp tune did this also)
If i wot all the way to 116 the car starts surging and cant shift until i let off gas to allow it to. Happens at 80 too when im cruzing and i try to go wot from 4th to 3rd and tries to shift up to 4th and cant but doesnt happen in any other gear.

read my entire post... it does it at those lower speeds cus your trying to shift into 4th

I was thinking that when it happens the engine is under huge load and the converter is locked correct? So maby there is an underlying issue. I have done everything to this car besides the coils, icm, upstream o2, and fuel pump. And any of these i guess could cause the issue cus with the tc locked up and the engine under such huge load i could be getting gimped from one of these causing a misfire and a a lack of shift there of. Ima go for a ride and scan to see if im getting any slight misfires and see what everything else is doing.

Well found out that it happens only at 95-100% load and cyl 5 is has a misfire at this time. So time to trace down the misfire. Im thinking fuel related.

no if its a slight misfire it wont. You need something to scan the car to watch the misfires in every cylinder. I would try basic maintenance stuff like fuel filter, plugs, wires, pcv, seafoam threw side T vacuum, seafoam in the gas, clean tb, maf ect

Im thinking that the cyl 5 is only misfiring cus i heard people having problems with the front cyl not getting cleaned when seafoaming through the brake booster hose, so ima grab a can and run it in the T i was talking about under the s/c snout and see if i notice a difference, then ill change my plugs again concidering they are 1$ each and swap around coils injectors and see if it follows.