supra head gasket questions+ rebuild

Bill UK · 05-10-2008, 10:44 AM

How sure are you that timing is correct, did you strobe it? A strobe light connects to # 6 spark lead and this is the one you suspect being the problem. A spark at the plug can be deceiving; it may not be strong enough to ignite the fuel. If your HT leads, spark plugs and timing are ok, and as you say there are no signs of fuel on # 6 plug then I would check the plug and wiring going to the injector. You could swap the injector plugs over for 5 & 6, pull the igniter lead and turn the engine over to see if any fuel is coming through to either spark plug. I think it’s a question of elimination, if there are no signs of fuel in # 6 but fuel in #5 after swapping over the plugs then it must be the injector.

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05-10-2008, 10:44 AM	#32
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	How sure are you that timing is correct, did you strobe it? A strobe light connects to # 6 spark lead and this is the one you suspect being the problem. A spark at the plug can be deceiving; it may not be strong enough to ignite the fuel. If your HT leads, spark plugs and timing are ok, and as you say there are no signs of fuel on # 6 plug then I would check the plug and wiring going to the injector. You could swap the injector plugs over for 5 & 6, pull the igniter lead and turn the engine over to see if any fuel is coming through to either spark plug. I think it’s a question of elimination, if there are no signs of fuel in # 6 but fuel in #5 after swapping over the plugs then it must be the injector.