Backfired

[getchasum]

Car had been running great! Last night on the way home, I stopped the car, spooled it up. Car ran strong until 2nd gear change. At this time it backfired once but it was bad. Car died and roll to a stop. Restarted the car, it seem to drive home ok. I never got in it again. What do you guys think might have caused this, maf, v. spings, timing, etc? Thanks.

 

[KEVINS]

Maybe it was detonating and the timing got yanked back so far by the computer it caused it to backfire..

ks

 

[Turbojorge]

Just a Thought

Do you have a heated 02 sensor?

I chased a problem just like you discribed for 5 months before I finally reallized that my 02 sensor was bad.

Heated 02 sensors tend to go bad without notice. I would get no MAL codes from any scanner and It just drove me crazy. I changed coil pack, MAF, I even changed the Cam!

I know you might be a little scared to, but get on it again to see if it will do it again. It could have just been a "one time" thing but you need to get on it to see if it will do it again.

 

[getchasum]

No , o2 is not heated, but it it is a new delco o2. Could a backfire such as this blow out a head gasket? However I do not think I was getting knock at the time, car was pulling very stong. When car died I lost all scanmaster readings, so to be honest I'm unsure it I had knock or not. Thanks.

 

[OldGrayII]

ONly a FOOL would get on it WITHOUT a scan tool of some sort!!!

 

[OldGrayII]

Sorry, disregard My last post, I see you HAVE a scanmaster!! My appologies!

 

[Turbojorge]

Originally posted by getchasum
Could a backfire such as this blow out a head gasket?


Backfires out the intake CAN blow head gaskets. However I averaged a backfire or two a day (I'm not proud of that) for 5 months and didn't blow a gasket. (thank God)



When car died I lost all scanmaster readings, so to be honest I'm unsure it I had knock or not.

Hmmm... If you lose power, then It could be a sign of a bad negative somewhere. Check all your grounds. Do you have an engine tie down strap of some sort?

I don't think a 23K mile MAF would go bad.

 

[1970gsx]

I had a problem anytime the engine would torque over from the shift the p/s header would touch the + battery cable to the starter. The car would pop and try to cut out. Check for a burn mark on that cable and move it out of the way. Took me a week of swapping parts to figure that one out.

 

[getchasum]

Battery cable seems to be ok as far down as I can reach. It still has all factory wire loom around it. I'm going to take it out tomorrow and roll in it kinda slow and see what happens.