Cottontail
Three-De Off-Road
- Location
- Nashville, TN
...spark plugs or wires on the 4.0. I just replaced my old ones with Bosch, and now the truck seems to be running rough?
Could this be related?
Could this be related?
Cottontail said:...spark plugs or wires on the 4.0. I just replaced my old ones with Bosch, and now the truck seems to be running rough?
Could this be related?
Judd W. VA said:In a word, yes. Do not use them in anything as far as i am concerned. Have been the subject of many auto manfacturers TSBs for misfiring issues. Modified programs have been needed in many German vehicles to combat ck engine lights due to misfiring codes being set. Especially do not use platinum plugs in anything not designed for them. The only benefit to platinum is that it does not wear as fast- they do not otherwise perform as well as standard plugs. Darned 'ole cheapo Champions work great in these 4.0s. I am considering NGK irridium (sp) plugs maybe next time maybe however just to see.