I have yellow spark.

Asked by Nov 17, 2015 at 05:00 PM about the 1994 Ford F-150 XLT 4WD Extended Cab SB

Question type: Maintenance & Repair

I have yellow spark I have change plugs,plug wires,distributer cap,rotor,coil
and the had ignition control module checked what's next?

2 Answers

65,645

Weak spark is a sign of ignition control module being bad,or coil,may need to check ground wire to coil to make sure it is good.

1 of 1 people found this helpful.
47,675

Distributor pick up coil down inside the distributor could be bad. ICM could also check good, but be bad. Needs more diagnosing. The link I posted may help.....http://easyautodiagnostics.com/ford/4.9L-5.0L-5.8L/ignition- module-tests-1

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