1998 F-150, 4x4, 4.6l engine, 300,000km (190,000 miles)
Thanks gentlemen for taking the time to answer my question.
As noted above, I have a misfire on 4 and 8. When it first happened I replaced all the plugs (60,000km since last plug/wire replacement). Misfire still occurred. I took it to a mechanic (he told me it was 4 and 8 that were misfiring), and suddenly it started running fine and he was unable to diagnose the problem. 1000km later it misfires again, so I replaced the wires, and now it is still misfiring. (A note about those 1000km, they all happened in one day, the day following the testing)
So 3 questions-
1. Where should I look next?
2. Is there an inexpensive method of testing I can use that will allow me to eliminate electronics and look at the fuel injector?
3. How much damage am I doing by running it on misfire (I need it to work)
Thanks in advance for any suggestions or advice you can give.
Sunday, January 14th, 2007 AT 7:13 PM