I have yellow spark.
I have yellow spark I have change plugs,plug wires,distributer cap,rotor,coil
and the had ignition control module checked what's next?
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.
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
Looking for a Used F-150 in your area?
CarGurus has 188,281 nationwide F-150 listings starting at $1,300.
Search Ford F-150 Questions
Ford F-150 Experts
Related Models For Sale
Used Cars For Sale