TCC lock up solenoid bad. 98 gp gt
- Thread starter L36pro
- Start date
L36pro
Banned
Re: 3.8, power loss, rpm flux, please help
i already replaced the lim, the plenum gasket, and throttle body gasket. its got a brand new fpr line as well. could it be the lock up torque converter? seems like it could be locking and unlocking. although it does it in both third and forth.
i already replaced the lim, the plenum gasket, and throttle body gasket. its got a brand new fpr line as well. could it be the lock up torque converter? seems like it could be locking and unlocking. although it does it in both third and forth.
clevelandfan
New member
Re: 3.8, power loss, rpm flux, please help
i would spray starter fluid all around the throttle gaskets, and all around the intake gaskets. u could be leaking. if the rpms raise a little then u prob do. quick easy backyard test.
i would spray starter fluid all around the throttle gaskets, and all around the intake gaskets. u could be leaking. if the rpms raise a little then u prob do. quick easy backyard test.
NegativeOne13
New member
Re: 3.8, power loss, rpm flux, please help
For the fluctuation, my guess is the torque converter. If you have a scan tool, drive down the road and if you can, manually lock in the torque converter while going down hill. If your RPM jumps stop, than that's probably your issue. And you can check your TCC slippage and duty cycle.
For the fluctuation, my guess is the torque converter. If you have a scan tool, drive down the road and if you can, manually lock in the torque converter while going down hill. If your RPM jumps stop, than that's probably your issue. And you can check your TCC slippage and duty cycle.
T0pwater
New member
Re: 3.8, power loss, rpm flux, please help
You need a good scanner with capability of 2-way communication. I don't know exactly which ones will work, but I know it's gonna be expensive. I've got my eye on the autoenginuity laptop-based scanner. You'd need the base scan package plus the GM pack. ~400 total if you get the base scanner on ebay.
I agree I think TCC is most likely. Also, I like propane for vacuum leaks. Less messy, less risk of fire.
You need a good scanner with capability of 2-way communication. I don't know exactly which ones will work, but I know it's gonna be expensive. I've got my eye on the autoenginuity laptop-based scanner. You'd need the base scan package plus the GM pack. ~400 total if you get the base scanner on ebay.
I agree I think TCC is most likely. Also, I like propane for vacuum leaks. Less messy, less risk of fire.
L36pro
Banned
Re: 3.8, power loss, rpm flux, please help
the motor is tight. theres no leaks. all new gaskets, new LIM gasket, new plenum, new MAF, TPS, MAP, IACV, PCV valve, etc. new fuel pump, new injectors, new plugs, wires, all new coil pack. in fact the only things i havent touched are the ICM, CPS, and O2 sensor. no codes, no check engine light. idk what to do.
the exhaust manifold gaskets are leaking. picked up a set. im gonna swap them out when i get a chance but havent gotten round to it.
the motor is tight. theres no leaks. all new gaskets, new LIM gasket, new plenum, new MAF, TPS, MAP, IACV, PCV valve, etc. new fuel pump, new injectors, new plugs, wires, all new coil pack. in fact the only things i havent touched are the ICM, CPS, and O2 sensor. no codes, no check engine light. idk what to do.
the exhaust manifold gaskets are leaking. picked up a set. im gonna swap them out when i get a chance but havent gotten round to it.
NegativeOne13
New member
Re: 3.8, power loss, rpm flux, please help
I use a Snap On Solus scan tool that allows two way communication as T0pwater said. I'm guessing component wear would be the reason. I had a remaned w/ 5k on it and I had that issue happen. Tried clearing tranny adapt settings and so on, nothing worked, but we did get it to lock in via the scan tool. Needless to say, my tranny was replaced under warranty.
I use a Snap On Solus scan tool that allows two way communication as T0pwater said. I'm guessing component wear would be the reason. I had a remaned w/ 5k on it and I had that issue happen. Tried clearing tranny adapt settings and so on, nothing worked, but we did get it to lock in via the scan tool. Needless to say, my tranny was replaced under warranty.