First, the codes:
P0101 - P0101 MAF or VAF Circuit Range/Performance Problem
P0300 - Random/Multiple Cylinder Misfire Detected
P0576 - Shift Solenoid B Performance or Stuck Off
Rough idle, very little power.
I was driving at highway speeds yesterday with no issues. After a stop
light, I noticed a slower than normal acceleration. About 10 miles later I
came to a small hill, nothing large, just an overpass. The truck began to
decelerate and MIL began flashing. I took the next exit and barely made it
up the ramp, engine running very rough and very little power. I stopped the
truck and shut off the motor. I checked the fluid levels and all was fine.
I restarted the truck and decided to drive 1/4 mile to a relatives home.
I returned today and retrieved the codes listed above. I then cleared the
codes and restarted the truck. It was still running rough. I only got the
first 2 codes and no flashing MIL. I then drove down the drive and got no
additional codes. I then drove it down the short road to a small incline
which was too much for it to overcome and caused the light to begin flashing
again. By small, I mean the intersection was raised about 3 feet higher
than the road I was on. This 3 foot rise is over a length of 10-12 feet. I
then got the last code again.
I don't even know where to begin with this. Fuel filter, fuel pump,
computer, sensor? A year ago I would have just taken it to a shop and asked
them to fix it. Unfortunately, it's now my grocery money that I have to
work with. Ant ideas or similar experiences? Thank you so much.
Well a bad MAF/VAF signal can cause the symptoms your seeing.
Does your scan tool allow you to read live data?
If so I would look at the MAF/VAF signal and see what you have in
relation to the TPS signals.
I did look at them, even in the dark looking for arcs. They all appear to
be good, I replaced them all at just under 100,000 miles, it's at 109,000
now so they should be good, but you never know. I did get random misfires
which led me to believe it's something before we get to that point.
On Wed, 10 Jun 2009 12:31:00 -0500, Tim fired up the etcha-a-sketch and
Writing from experience, yes.
Well, actually, the clogged cat wasn't the original root cause, but it
sure messed stuff up.
I had a '95 Jimmy 4x4 with the 4.3L V6. The injector in one or more
cylinder got clogged and I started experiencing misfirings at around 70K
miles. (The injector for this truck sucked!)
After I got the injectors replaced, I was still having issues. I figured
the O2 sensors were fried and - upon checking - that was true. Replaced
Next it still was running rough. It was the cat.
Because of the other issues, the cat got clogged and needed to be
replaced. Did so at about 120k miles and all was well after that, except
for the 4x4 system going out. :P
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