Ok, I'm having a no start at 1/4 temp or 155 degrees. This is the only symptom I can see. I just got a smog-check and now the starting problem. I do have new wires,plugs,distributer,timing chain,air cleaner,fuel filter,starter---all about 1,000 miles ago. Dam CA. smog laws. Any ideas??????? This is a 1991 burb 350 tbi 4l80 3/4 ton. and I just did a leak down test and a comp. test.