backFIRE!!!

[soccer dad]

My waggy has been running well lately after getting some electrical problems sorted out.

Maybe it has nothing to do with it, but last night I filled up at a gas station (offbrand) that I had never used before. Fifteeen miles later when I got home, she was bucking & hesitating. I went out this AM & she started backfiring when I let off the gas. I'm talking HUGE backfire. Twice, people behind me backed off a hundred yards. I guess they were scared, but it did sound like a shotgun each time. It stalled after the largest backfires, but I could start right back up.

I crammed 6 gallons of Texaco premium in tonight. But I didn't get to drive far to see if it solved the problem.

Could bad gas be the culprit? If not, what..?

[Stuka]

Bad gas can cause it to run bad to a extent, but back fires like that make me think the timing is shot. Stick a timing light on it and see what its at just to be safe. If timing gets to far out you can snap a rod/piston. You timing chain may be stretched out and poped a tooth. In which case your valve timing can get messed up as well. I have seen several engines popa few teeth on a timing chain and bend all the intake vales.

It could also be that it is just stretched and not skipped a tooth yet. So I would definately check it, having a timing light on it at idle, then have somebody gas it to rev it up and see if the timing goes wacho.

[thos]

One thing's for sure, you can probably kiss that power valve good bye.

[Stuka]

Thos: sounds like it is backfiring out the exhuast not the carb. if it sounded like a gunshot out the top of the carb i would be jumping out of that thing mighty fast ;)

[gc4x4]

Hey Soccer, before you spend any repair time, dump two bottles of gas dry into your tank and drive it around a bit. Have had the same thing happen to me.

[64Trvlr]

<blockquote>quote:</font><hr>Originally posted by Stuka:
If timing gets to far out you can snap a rod/piston. You timing chain may be stretched out and poped a tooth. <hr></blockquote>

If the chain streches or jumps a tooth or two you might put a valve into a piston and break it or put the rod through the block, but you won't just break a piston or snap a rod right out of the blue.
But a good call on checking the chain.
:cool: