[92sspnotchback]

I have a 351w with a c4 tranny in my 90 gt, it is carbed. The engine idles great "idle set at 950", until you put it in gear, then the idle drops WAY down and it will go dead unless you keep the idle up by keeping your foot on the accel. pedal. I have not been into the engine, but I was told that it has a lunati cam in it, and it has a alum. intake. When I bought the truck the forward frictions in the c4 were burnt up in the tranny, so I completely rebuilt it. I also added a TCI 2500 stall converter. I have checked all over the top of the engine for vacuum leaks and have not found any. I have to set the idle at about 1500 just to keep it running in gear, please help me out, this is about to drive me crazy. BTW this was the first tranny that I have built, it went very smoothly and I learned a lot, but I have to ask, I checked clearance with a feeler gauge during final assembly, if it was put together to "tight" would it cause this problem??

[86er]

how big is the cam, may want to change your power valve

[92sspnotchback]

I tried a 670 street avenger and a 650 double pumper, did the same thing. I have not been into the engine, was told it was stock other than a lunati cam and a alum. intake.

[White Thunder]

did it do this before and after the stall converter

[92sspnotchback]

Originally Posted by White Thunder did it do this before and after the stall converter

The tranny was burnt up when I bought the truck that the engine and tranny came out of, so I built the tranny and put the new converter in. So, I do not know if it did it before.