Miss fire problem. Please help!
#21
Has anyone thought about maybe a burnt valve? Of course, it wouldn't have gotten worse with the wire change if it was a burnt valve. Has to be crossed wires to be worse after the install of the new wires. Firing order is 1-8-4-3-6-5-7-2.
#22
for sure it could be a valve but that is why the cylinder balance test will help find the bad cylinder.
or new test ...
now that you have run a while on the new plugs,
take them all out ( pop them into a card-board to keep them in order ) to see how they are burning, should all be the same ... black on the sides and light to drark brown in the middle.
if you have a plug that is wet in gas and white still , it could be a bad or mixed wire.
with all the plugs out you can do a compression test to check for bad valves.
or new test ...
now that you have run a while on the new plugs,
take them all out ( pop them into a card-board to keep them in order ) to see how they are burning, should all be the same ... black on the sides and light to drark brown in the middle.
if you have a plug that is wet in gas and white still , it could be a bad or mixed wire.
with all the plugs out you can do a compression test to check for bad valves.
Last edited by 18436572; 05-13-2010 at 10:19 AM.
#25
Hey its been a while and i just think i should say that the miss has gotten a little worse. It does it all the time now when i downshift, deccelerate, or rev it hard. If i step on it it will miss for a second, if i rev it quick it misses alot. Ever since it has started doing it, it has progressivly gotten worse and i am afraid it will continue to only get worse. I know for sure its not the plugs, wires, cap, button, or wrong firing order, those have all been changed like i said and the firing order has been checked. Please does anybody know what else it could, let me know even if its bad, i have to know because i dont wanna wait and slowly watch my car get ****ty.
#28
Well when its cold it acts like its gonna die for a second after i start it up but if i rev it once or twice it doesnt die but it keeps idling rough...if i put it in gear when its cold it will either die if its real cold or chug real badly if i let it warm up for a few minutes (worse in revererse). But for the most part it always is rough at idle hot or cold.
#29
so you basically haven't done any tests then?
your just still listing symtoms.
just reread the three pages of advice, do the tests, or get them done and if you still have a problem ... it would be easier to give more advice.
basically every possible problem with an engine is listed .... lol
your just still listing symtoms.
just reread the three pages of advice, do the tests, or get them done and if you still have a problem ... it would be easier to give more advice.
basically every possible problem with an engine is listed .... lol
#30
Might wanna look at the carb next then to rule that out, or in.
Has it ever been rebuilt, or does it need to be?
Is the choke opening all the way?
What kind of fuel filter do you have?
Have you checked to see if your carb still has the built-in filter in the carb? It's usually a real fine sintered bronze and is located under the big fitting where the fuel inlet line is connected.
Whatever you do, DON'T horse that fitting back onto the carb, they can strip out very easily. Often times, that filter can be forgotten about and could be clogged and restricting fuel flow.
It's worth a look anyway.
Has it ever been rebuilt, or does it need to be?
Is the choke opening all the way?
What kind of fuel filter do you have?
Have you checked to see if your carb still has the built-in filter in the carb? It's usually a real fine sintered bronze and is located under the big fitting where the fuel inlet line is connected.
Whatever you do, DON'T horse that fitting back onto the carb, they can strip out very easily. Often times, that filter can be forgotten about and could be clogged and restricting fuel flow.
It's worth a look anyway.