99 gtp running horrible need help

[gtcoup]

So my 99 gtp 179k runs weird. Its kinda hard to explain so please try to work with me. I've tried searching scouring the internet and I just don't know so here we go. Say I'm cruising down the road going 35mph, slow down to like 10 bang a corner and get back on it, it loses power. Like I get on it and the rpms drop then shoot up like 3k and it goes. It sounds like **** to. Then today I was going 80 oon the highway and lightly on the gas to keep speed the rpms were jumping from around 2600 to 3000 surging seeming like a missfire but no codes. I've checked plus, wires, coils,changed fuel filter,I did a compreson test, I'm pretty sure all my vacum lines are good. I'm at a brick walll with this. Its gotten worse over the past 2 weeks. Any help / sugestions arre much needed and appreciatted. Matt.

 

[RooK]

Pretty sure this is all transmission related. The surging is the TCC if I remember right. The rpms shooting up is either clutch or TC slippage. I'm sure someone will chime in with the exact diagnosis, but it's not your motor.

 

[gtcoup]

anyone else deal with something similiar?

 

[FordMan77]

Yep. My RPMs surge sometimes too. Usually more prone to do it when in 3rd or 4th under a load (like going up a hill) and I give it some gas. Mine doesn't loose power around the corners though.

 

[lrscgod]

Could be a MAF acting up or a TPS. It's not outside the realm of possibility. My son's 95 olds was doing something similar, we changed the MAF and it stopped.

 

[Jackblack99]

Maybe the converter is locking and unlocking. Do you have access to a tech2 or good scanner that can live data stream? If so hook it up and go for a drive while monitoring the transmission parameters. See whats going on there if any of the readings are eratic.

 

[BillBoost37]

Most commonly this is ignition related. You said you checked the plugs and wires. How did you check them?

 

[99gtp3]

My Car started to do this i think wen i put My own cold air intake on think i messed with maf sensor?