ok hears the deal. My truck was running ok till i did the header gasket on the drivers side. this is the side i am running my 02 sensor on. i had a big leak on #7 burnt the gasket all the way through. now wen i step into it it will pop some times to the point that the motor will die. any clue what is causing this. this is my list of specs.
1988 k2500. The truck has a holley tbi intake 670 cfm tbi comp cams extream energy cam with 206/212 i/e @ .050 dur and .434/.444 I/E lift. it also has full flowmaster cat back, hi flow cat and a set of gibson headers on the 350.

please help me

thank you

 

up date runs good on start up after siting for 1.25 hours great responce and will lay ruber no prob.

there any thing else that i can give you that will help you help me

could it be the coil heatin up and die'n i had this hapen on a 89 rs once.

 

Replace your o2 sensor. Get any codes?

 

ya i am going to do that any ways i think i may be going to a WBO2. but i found the problem the distributor clamp was loose and it slipped to about -12 (deg) tdc so i set it up about 5 (deg) advanced.

 

That'll do it . I had the same thing happen to me a couple times. After that happened I ruffed up the fingers on the clamp, no more slip.