Engine misfiring
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Engine misfiring
1994 SSE, 164,000 miles, new plug wires a couple hundred miles ago (not GM, Autolite Professional). Anyway, engine started misfiring today. I can see a "glow" arround the front 3 spark plugs, where they screw into the head, whitish/blue arching glow that increases with RPM. At 4500 RPM engine starts pulsating up and down between 4000 and 4500 RPM like suddenly spark only half the time. No loose connections or moisture in or arround ICM or coils. Can anyone tell me what would cause this "glow" at the plugs? Note: using GM dual tip platinum plugs changed at same time as wires.
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Re: Engine misfiring
Originally Posted by iwin12
1994 SSE, 164,000 miles, new plug wires a couple hundred miles ago (not GM, Autolite Professional). Anyway, engine started misfiring today. I can see a "glow" arround the front 3 spark plugs, where they screw into the head, whitish/blue arching glow that increases with RPM. At 4500 RPM engine starts pulsating up and down between 4000 and 4500 RPM like suddenly spark only half the time. No loose connections or moisture in or arround ICM or coils. Can anyone tell me what would cause this "glow" at the plugs? Note: using GM dual tip platinum plugs changed at same time as wires.
#5
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Re: Engine misfiring
Originally Posted by Kennginn
Originally Posted by iwin12
1994 SSE, 164,000 miles, new plug wires a couple hundred miles ago (not GM, Autolite Professional). Anyway, engine started misfiring today. I can see a "glow" arround the front 3 spark plugs, where they screw into the head, whitish/blue arching glow that increases with RPM. At 4500 RPM engine starts pulsating up and down between 4000 and 4500 RPM like suddenly spark only half the time. No loose connections or moisture in or arround ICM or coils. Can anyone tell me what would cause this "glow" at the plugs? Note: using GM dual tip platinum plugs changed at same time as wires.
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Re: Engine misfiring
Originally Posted by BillBost37
Originally Posted by Kennginn
Originally Posted by iwin12
1994 SSE, 164,000 miles, new plug wires a couple hundred miles ago (not GM, Autolite Professional). Anyway, engine started misfiring today. I can see a "glow" arround the front 3 spark plugs, where they screw into the head, whitish/blue arching glow that increases with RPM. At 4500 RPM engine starts pulsating up and down between 4000 and 4500 RPM like suddenly spark only half the time. No loose connections or moisture in or arround ICM or coils. Can anyone tell me what would cause this "glow" at the plugs? Note: using GM dual tip platinum plugs changed at same time as wires.
#7
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Re: Engine misfiring
Originally Posted by Kennginn
Originally Posted by BillBost37
Originally Posted by Kennginn
Originally Posted by iwin12
1994 SSE, 164,000 miles, new plug wires a couple hundred miles ago (not GM, Autolite Professional). Anyway, engine started misfiring today. I can see a "glow" arround the front 3 spark plugs, where they screw into the head, whitish/blue arching glow that increases with RPM. At 4500 RPM engine starts pulsating up and down between 4000 and 4500 RPM like suddenly spark only half the time. No loose connections or moisture in or arround ICM or coils. Can anyone tell me what would cause this "glow" at the plugs? Note: using GM dual tip platinum plugs changed at same time as wires.
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Engine Misfiring
Thanks guys.
Plugs are fine as far as deposits, gap (clean/look good) It seems "funny" that all three odd cylinders are arching to the block and all happened at the same time. Will have the coils checked or check myself if I can find instructions and specifications.
My wife was driving the car (I know, that was my first mistake) she said she drove through some deep water. The engine is dry from heat and time. Coils and ICM are dry.
Don't know if just coincidence or if water shorted something.
Plugs are fine as far as deposits, gap (clean/look good) It seems "funny" that all three odd cylinders are arching to the block and all happened at the same time. Will have the coils checked or check myself if I can find instructions and specifications.
My wife was driving the car (I know, that was my first mistake) she said she drove through some deep water. The engine is dry from heat and time. Coils and ICM are dry.
Don't know if just coincidence or if water shorted something.
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