i have an 88 TA 305 tbi. i have recently within the past month just replaced the plugs, wires, cap, rotor, fuel filter, coil and air filter. every now and then the car starts to back fire. the car doesnt do it all the time. when the car starts to back fire the temp is usally between 190-200 on gauge. when i purchased the car a few months ago i had to readjust the timing to get it back to 6 degrees. i am a full time mechanic so i do have resources to all kinds of testing and tools. but the car never acts up when i am near my garage. Recently the SES has been kicking code 32 EGR PROBLEM but i have checked the egr valve and cleaned it seems to work fine. any kind of suggestions or comments would be appreciated. input would be nice as soon as possible the last back fire destroyed my muffler and tail pipes.

 

Burnt valve?

 

i dont think so...it isnt a constant problem but it does leave me stranded in places when it does happen. Besides dont burnt valves always cause problem not only under higher temp. when warm.

 

I wouldn't be driving the car if it's backfiring that bad, even if it isn't all the time.
Are you sure you haven't accidently gotten the firing out of order?

If you set the timing to 6° it should be purring like a kitten. I'd change the timing chain before it's to late.

Disconnect the set timing connector rev it to 1 -2k rpm and hold it steady, using the timing light see if the timing jumps around, if it is it's time (no pun intended) for a new distributor.