spark plugs
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Joined: Apr 2011
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spark plugs
my mechanic told me (while he was doing my wheel bearings) that my 73 is starting up on 7 cylinders then when it warms up goes on all 8.
his quick fix solution was to try and replace the spark plugs with the next firing size. i currently have champion BL - 11Y
what should i try with the new ones or should i not be doing this?
his quick fix solution was to try and replace the spark plugs with the next firing size. i currently have champion BL - 11Y
what should i try with the new ones or should i not be doing this?
Thread Starter
Advanced
Joined: Apr 2011
Posts: 60
Likes: 0
my mechanic told me (while he was doing my wheel bearings) that my 73 is starting up on 7 cylinders then when it warms up goes on all 8.
his quick fix solution was to try and replace the spark plugs with the next firing size. i currently have champion BL - 11Y
what should i try with the new ones or should i not be doing this?
his quick fix solution was to try and replace the spark plugs with the next firing size. i currently have champion BL - 11Y
what should i try with the new ones or should i not be doing this?
Burning Brakes
Joined: Oct 2001
Posts: 1,241
Likes: 4
From: Okinawa Okinawa
Take a timing light, hook it up to the non-firing cylinder and see if you are getting power to that plug wire. If you are, it is either not fully seated on the spark plug or your plug needs to be replaced. If you are getting no power to that one wire, start looking back to the dizzy. Maybe the wire is not seated on the cap.
Le Mans Master
Joined: Aug 2006
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
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Race Director
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Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
If he was any good, he would have isolated which plug it was, removed it to check whether it was the plug or not, also checked the wire to that plug and the distributor cap.
Since he didn't do any of that, he's probably just "stumping" for more business...
Since he didn't do any of that, he's probably just "stumping" for more business...
Melting Slicks
Joined: Mar 2002
Posts: 2,164
Likes: 7
From: Beringen
Measure resistance of your wires. Should all be in the same range. I just had the same thing happening on the startup of a new engine. Ran really rough, explosions in the exhaust and such. Took the plugs out, no problem. Took the wires off and measured them. One was broken.
Drifting
Joined: Nov 2007
Posts: 1,699
Likes: 270
From: New York
Sort of related to you topic, I have found Champion spark plugs did not work well for me. After a day at the track, they need to be replaced. After a few brands I now use NGK spark plugs. You may want to consider giving them a try.
Had a 1976 L-82, 4-sp
Joined: Mar 2011
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From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
When I installed the AFR 195's I put in Rapidfire # 5's. They eventually took on a nice tan colour but the engine took a while to smooth out at idle. I then put in the NGK's. The engine smooth's out much quicker on warm up and seems to run better. The plugs are now white vice tan with no other changes to the engine.