p0300 & p0101 codes and runs like crap
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p0300 & p0101 codes and runs like crap
I'm working on a friends 02 silverado we recently put a new motor in. First it was running fine but experienced extreme spark knock under WOT(the old motor did this too), tried switching to super but it made no difference, no SES except for 0300 for a random misfire.
Now it is running like crap and barely makes 30mph, it misses continously and has the above codes. Fuel pressure is fine and I do not think it is the MAF because there is no change when the MAF is unplugged.
Please Help
Re'
Now it is running like crap and barely makes 30mph, it misses continously and has the above codes. Fuel pressure is fine and I do not think it is the MAF because there is no change when the MAF is unplugged.
Please Help
Re'
Last edited by RE AND CHERYL; 10-23-2010 at 08:20 PM.
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My scanner has a live scan feature but does not display cylinder misfire. What I did notice though was that bank one showed a long term fuel correction of -1.6% and bank two was 20.3%, would that point to a clogged cat too?
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Well I dropped the y pipe and started the engine, It ran perfect. I installed another catted y pipe I had sitting around from another silverado I worked on. It runs perfect and the spark knock is even gone. I have seen cats go bad but never with these symptoms. Well...gotta get a new catted y pipe now (the one I installed has bad cats because a blown head gasket dumped a LOT of water through them).
Thanx for the help guys.
The extreme spark knock trashed the bottom end.
Re'
Thanx for the help guys.
Re'