Spark plug check #7 strange
08-29-2018, 12:12 PM
#1
Drifting
Thread Starter
Spark plug check #7 strange
Hi after getting back on track after the loose torgue converter I changed my week old plugs and found ou that number 7 had nothin goin on.
All others look like the plug on the left.
I now checked for spark, plug boot on, pulsation at the old style injector(going to check it out), is there anything else that will affect #7 except the distributor cap?
Thx for any ideas.
Last edited by xrav22; 08-29-2018 at 12:52 PM.
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xrav22 (08-29-2018)
08-29-2018, 01:17 PM
#3
Team Owner
Member Since: Oct 2004
Location: altered state
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St. Jude Donor '05
Are you losing any coolant?
08-29-2018, 01:22 PM
#5
Drifting
Thread Starter
No coolant loss, assuming plug is good it was brand new. Just put NGK GPower in and it seems much better but I have only made my fixit video, I will finish checking things
after the test drive. I also added Lucas fuel injector cleaner for now.
THX
after the test drive. I also added Lucas fuel injector cleaner for now.
THX
Last edited by xrav22; 08-29-2018 at 01:23 PM.
08-29-2018, 01:34 PM
#6
Race Director
The plug on the right looks like it's firing and burning cleanly. The insulator is not white but colored so it is working. If it was not firing, it would be wet with fuel. The plug on the left to me doesn't look like it's burning the way it should after only 1 week. It looks almost fouled.
Last edited by 383vett; 08-29-2018 at 05:52 PM.
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xrav22 (08-29-2018)
08-29-2018, 07:44 PM
#7
Le Mans Master
..... If the car sat for a long time , you might try tapping on the injectors … I use a wooden paint stirring stick and tap with the handle of a good sized screw driver … wouldn't hurt to hit them all …..
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xrav22 (08-29-2018)
08-30-2018, 08:28 AM
#8
Melting Slicks
Member Since: Sep 2008
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The plug on the right looks like it's firing and burning cleanly. The insulator is not white but colored so it is working. If it was not firing, it would be wet with fuel. The plug on the left to me doesn't look like it's burning the way it should after only 1 week. It looks almost fouled.
Track cars need NGK's or Autolite plugs.
If using corn gas suggest Strar Tron fuel additive.
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xrav22 (08-30-2018)
08-30-2018, 09:12 AM
#9
Le Mans Master
….. I disagree … there's NO color at all on the plug to the right and according to the first post ALL of the other plugs look like the left one … the right plug is firing/getting spark , I can see a line on the center electrode approx. 1/16th inch up from the end … but there is no color or mark on the ground strap … there should be a heat range mark at least somewhere between the tip and the plug body … that plug shows no evidence of combustion in the #7 cylinder … easy enough to check with a laser infrared thermometer about $50 bucks at Harbor Freight … or do the water drip or spray on the exhaust manifold … cold enough , like that one looks to just be able to touch the exhaust manifold or header …..
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xrav22 (08-30-2018)
08-31-2018, 01:13 PM
#11
Drifting
Thread Starter
Fixed , started to follow the tips today and noticed my injector plug had come up and was not firing the injector. It looked like it was on, and felt like it too.
I see the heat burning off the #7 now and idle does not surge anymore
Thx of course for the tips.
I see the heat burning off the #7 now and idle does not surge anymore
Thx of course for the tips.
08-31-2018, 10:19 PM
#12
Intermediate
its allways the simple stuff
09-01-2018, 07:08 AM
#13
Drifting
09-01-2018, 10:14 AM
#15
Drifting