spark plug issues
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Junior User
Joined: Jan 2005
Posts: 82
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spark plug issues
i couldn't get the truck to start, and the problem ended up being the spark plugs. the truck had been sitting up like a year and a half. the plugs all looked fouled out and covered in carbon. i already put on a new ignition module, new coil, new distributor cap and rotor, new wires, and a new battery. after the new plugs, it fired right up. that was yesterday. today, it struggled to start, so i pulled the #1 plug and it looks just like the old ones i took out! it's black! i assume it's getting too much fuel, but what is causing that? timing? it also backfires sometimes if you give it too much gas or if you stomp on it. what do you think? thanks yall!
Postmaster
Joined: Mar 2003
Posts: 4,038
Likes: 2
From: Spokane WA
Sounds like its running WAYYYYYY rich.
time for a carb rebuild. Generally when something has sat for that long, your gonna have carb issues, stuck float, something gummed up from the varnishy gas that has sat in its fuel bowl for a year plus
is it backfiring out the exhaust....or the intake?
time for a carb rebuild. Generally when something has sat for that long, your gonna have carb issues, stuck float, something gummed up from the varnishy gas that has sat in its fuel bowl for a year plus
is it backfiring out the exhaust....or the intake?
Thread Starter
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Junior User
Joined: Jan 2005
Posts: 82
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usually it backfires out of the exhaust. it does it mostly when it hasn't warmed up. i drove it for about 45 minutes yesterday, and after about 15 minutes, i could floor it and it wouldn't do it anymore. it has blown fire up through the carb a few times, too. what exactly does that mean?
Posting Guru
Joined: May 2004
Posts: 2,223
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From: Billings Montana
Blowing fire through the carb and backfiring sounds like timing to me. Check your timing to verify that it's on the money. Another thing to check into would be vacuum leaks. With the truck sitting that long, you could have some rotted vacuum lines.
