There are quite a few things that could cause this.
#1. Check the Power Transistor Unit. (located on the intake manifold generally) This provides signal to coil from ECU and also provides RPM for tach.
#2. Check the Coil Pack.
#3. Your ECU might be taking a dump. Get it tested.
#4. Bad ground or a short.
Last Updated:
2015-11-16 06:53
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