Question about 1994 Chevrolet Lumina

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94 chevy lumina with 3.1 v-6 has a missfire under load and while looking at the data stream through my scan tool the rpm signal is erratic while the actual engine speed doesnt change. the data will show up to 4300 rpm while it is idling. tried replacing ign module, didnt fix it, had new prom made, didnt fix it. i dont think its the crank sensor since it shows an rpm signal its just erratic. any help would be greatly appreciated

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HAVE YOU CHECKED YOUR IGNITION COIL?

Posted on Mar 25, 2011

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