The car is a 94 Camaro Z28. It has a 4200 stall converter. The car will drive normal for a good while until everything warms up a bit. Then it seems I either have trouble getting the car to go from idle, or when I floor it after picking up some speed, the car does not respond with a high rate of speed like it usually would. Both times the car feels like its slipping. The converter is on a 4l60E. Car is making at least 320 to the motor and 360 lb ft of torque.

Thanks.

Carlos

 

I'm no expert, but I had a similar experience...the car wouldn't go in reverse gear - I mean it would...but normally idle would make it fly backwards...

Anyways, try checking the fluid. maybe your leaking. if there's not enough fluid in the gearbox, then the converter won't have enough for peak performance...
That was my problem...Again, it can't hurt, and I'm no expert.

 

Are you sure that the car isnt setting limp mode are you getting an codes or check engine light when the car is warm . Limp mode will feel like the car is slipping badly when taking off in drive and you wont feel any gear changes. A high stall can sometime cause this condition by setting a code for shift solenoid B even though theres nothing actually wrong with it, Many times it wont cold because the PCM is more tolerant when operating in cold mode of the RPM differential caused by the converter.

 

Yes I am getting a code but I have to buy the reader to check it. I will buy it today. How do you repair such a code and is this code harmful to my transmission. Thanks.

Carlos

 

Also will limp mode cause the car to feel like its slipping badly even after taking off and getting up to speed? I was going like 50 mph already, and it did the same thing again. Thanks

Carlos

 

Yes it will . When you get the code post what the number is and Ill advise you on how to proceed.

 

I get code P0102 and P0757. I know the latter is the solenoid B trouble code.

Thanks.

Carlos

 

Have you had the car tuned for that stall . PO757 is a comon code causing limp mode after a converter install. Basically the PCM dosent understand the arpm DIFFRENTIAL cause by the stall so after it commands third gear it does not think the shift happened and assume the solenoid is stuck or bad and then sets limp mode, You will beed to have the test deteted for the code its not eneough to clear the code, The actual test must be disabled in the tuning program. I am not sure how hard this is on the earlier cars, With the late 98 up cars its just done with any tuner but I think on the 94 you will have to send the PCM to someone to do it for you.

 

Alright. Sounds good. What is the test called in the handheld tuners and what tuner would work for my car? My car is a 94 Z28, but it has a 2003 LQ4 engine with a 2002 OBDII PCM. Thanks.

Carlos

 

hptuners, EFI live, predator there ar little boxes ou can uncheck I have seen the sreens but I am not a tuner but from the looks of what I have seen it should be faily obvious once your in there

 

When it comes to the handheld tuner, would you happen to know if I should purchase by computer year or engine year?

Thanks.

Carlos

 

COMPUTER being used I would ask the vendor what you need

 

Ok. My friend accidently erased the trouble code but the car still acts like its there. This is normal right? It shouldn't indicate that my transmission is gone right?

Thanks.

Carlos

 

Dosent sound like the trans is gone just get the tune fixed for the stall and you should be fine

 

Thank you so very much. I really appreciate your help.

Carlos