Quote:
Originally Posted by Old Mechanic
Too many unanswered questions.
That much condensation:
Head gasket
Thermostat
very short haul driving
Fouled plugs, apparently multiple times but no check enngine light!
Clean injectors, determine why it is running rich without CEL
Low coolant temperature, open loop?
Need more info.
regards
mech
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I was tired when I posted this and left out a bunch of info...
There is a CEL with codes P0303 and P0304 (misfire). I believe I watched engine temp about a month ago and found it wasn't rising much above 140 degrees F. Thermostat could certainly be malfunctioning. Or, could running rich prevent the engine from coming up to temp in 1hr of driving?
Initially I was worried about the head gasket, but the coolant levels are not changing. Maybe water or condensation got in through the thumb-sized hole in the PCV hose?
This is where the part is located:
And approximately the same sized hole and location:
I'd think the car would run lean since it's pulling in air from the PCV downstream of the MAF sensor. Or does the PCV always have fresh air (not exhaust gas) to begin with?
Would the PCV valve close off flow if it detects a leak in the hose?
I'm thinking all this is unrelated to the misfire. The plugs and wires have been replaced, but not the coil pack.