On the way home tonight, there was a brief stint where the truck ran a little rough on the highway and the MIL was flashing. After about a 1/2 mile, I could feel the truck smooth out and the light stopped flashing and just stayed on. I guess my first trip tomorrow will be autozone for a code scanner. Any guesses?
I'm still on the stock plugs so it's probably about time to change them, though I would think that if one of them fouled out, the truck wouldn't run rough, then smooth out. So far it runs fine and the light is still on, but I need to get over the the Vato Zone this afternoon to get the codes pulled.
I've finally got time today and I'mm going to Advance to pull the codes shortly. I've been driving pretty easy since the light is still on, but I had to step on it on the highway to merge today and the truck started breaking up in the higher rpms and the light started flashing again. Once I eased off and cruise about a 1/4 mile, it smoothed back out and the light stayed solid.
Alright, so after searching for the term p0302, I found rockpick's thread where he had injector troubles and also got that code. I'll add that in my situation, I've had instances where the truck would be very hard to start and i've had to crank for longer than normal to get it to turn over. I suspected it was injector related but wasn't sure.
so the culprits could be:
1. plug - possible, but not likely
2. COP - probably
3. injector - possible
How would one test to find out which one's the problem?
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