Something is slipping (99GT)

[Dfranz1]

Hi guys, this is my first post and it comes with a problem...

This has been occuring for a few weeks now. I'm not sure what it could be but something is isn't connecting and power is not being transferred to the wheels. It happens the worst at high gears, for example doing 55 in 5th gear. If I even push a little bit, the car shakes and the rpms stay put. The car does not accelerate at all. The problem is better if I downshift to 4th and raise the rpms, then it doesn't slip as much. It happens less in lower gears but the common factor seems to be whenever I push the car even a little bit.

I thought it was the clutch starting to go so I had it replaced last week. It did not fix the problem. I am at 70k miles so I think it would have needed replacing soon anyways. I really have no idea what it could be something is slipping and its pretty annoying.

I do have Steeda UD pulleys if that could cause this...

Thanks

David

 

[trinity_gt]

Hi guys, this is my first post and it comes with a problem...

This has been occuring for a few weeks now. I'm not sure what it could be but something is isn't connecting and power is not being transferred to the wheels. It happens the worst at high gears, for example doing 55 in 5th gear. If I even push a little bit, the car shakes and the rpms stay put. The car does not accelerate at all. The problem is better if I downshift to 4th and raise the rpms, then it doesn't slip as much. It happens less in lower gears but the common factor seems to be whenever I push the car even a little bit.

I thought it was the clutch starting to go so I had it replaced last week. It did not fix the problem. I am at 70k miles so I think it would have needed replacing soon anyways. I really have no idea what it could be something is slipping and its pretty annoying.

I do have Steeda UD pulleys if that could cause this...

The car sounds way down on power if it cannot accelerate in 5th at 55. It sounds like the car is leaning out under load. This suggests perhaps a very dirty MAF sensor element or perhaps poor fuel pressure. If it's noticeable most at highway speeds you might also want to have the catalytic converters checked and the exhaust system in general checked for crushed pipes, kinks or other restrictions to flow.

Has the MIL ("check engine light") been on at all during this time?

"Slipping" would imply that the engine RPM goes up but vehicle speed does not.

 

[Dfranz1]

Hi thanks for the response.

I just got back from a little test drive and tried to jot down everything that happens. During hard acceleration, or less in higher speeds and gears, power seems to cut for split seconds causing vibrations. The worst is around 50 in 5th gear. Flooring the peddle will cause the car to vibrate and the RPMs do not move. Speed does not increase either. If I keep it down, eventually the car stops shaking and it accelerate normally. I have an offroad H-pipe and all the tubing looks to be fine.

So that leaves me with a dirty MAF or or bad fuel pressure, right? Is there anything I can do with the MAF?

thanks
David

 

[MT1083]

try cleaning your maf and replacing fuel filter. A few maintainence items may clear it up.

http://www.bullittarchive.com/html/modules/articles/article.php?id=77