If it's back firing there's really only two probable reasons, the timing is off or you have a problem with the valve train. If it's been sitting a while I'd check for a stuck valve. As far as timing goes I'm not familiar enough with your engine to tell you what to do.
You can try a little PB blaster (available many auto parts store). The danger here is that a stuck valve usually has rust you'll have to be careful not to damage the valve guide or seat.
Your best bet is to remove the head, clean up the valve and reseat it.
Go to a local auto parts store or a farm and garden store they may be able to suggest some better products that I don't know of.You can try a little PB blaster (available many auto parts store). The danger here is that a stuck valve usually has rust you'll have to be careful not to damage the valve guide or seat. Your best bet is to remove the head, clean up the valve and reseat it. Go to a local auto parts store or a farm and garden store they may be able to suggest some better products that I don't know of.
Answers & Comments
If it's back firing there's really only two probable reasons, the timing is off or you have a problem with the valve train. If it's been sitting a while I'd check for a stuck valve. As far as timing goes I'm not familiar enough with your engine to tell you what to do.
You can try a little PB blaster (available many auto parts store). The danger here is that a stuck valve usually has rust you'll have to be careful not to damage the valve guide or seat.
Your best bet is to remove the head, clean up the valve and reseat it.
Go to a local auto parts store or a farm and garden store they may be able to suggest some better products that I don't know of.
I've often used furnace oil to unstick a valve