Quote:
Originally Posted by 19963.4lsr5
Your check engine was flashing and then went out?
Usually in a missfire condition it will flash then go steady.
Your dialogue box is a code reader? If so what codes do you have when you say nothing out of the ordinary.
How old are your plug wires and the coil booties.
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Yes, the CEL was flashing while I was at highway cruising speed - no acceleration. After about a minute or so, the light went out, but the truck ran smooth and normal throughout.
Don't know age, but they wires and boots look fine.
What I meant was that my code-reader(Foxwell N630) had no codes and the live data for stuff like MAF and o2 looked within range
Anyway, I saw your post yesterday, but wasn't able to reply due to this site not responding for some reason.
In order to make a more informed reply, I put the Foxwell back on the car and this time, I looked at the "pending" codes, not the stored ones.
Pending was a Cyl 3 misfire code. Since I didn't know when that code was recorded, I cleared it and went running errands.
Twenty miles later I got home and put the Fox back on the car and this time I had a P0300 Random Misfire code.
Thinking it through, I concluded that it was possible that either coil 3 was failing, or just flakey. My thought being the one Cyl 3 misfire code, followed by 'random' misfire could be from the flakey coil missing back and forth on 3 and 5.
So I took a gamble and picked up a replacement coil on the way home from work and installed it before dinner.
Problem solved. The truck runs like new again. Smooth as glass acceleration and much better pull. Should really help my commute to work.
Thanks for the input, hope someone else can get some help from my story.
—K