Strange stumble problem 2000 Blazer
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Strange stumble problem 2000 Blazer
I got this blazer with a blown transmission. Swapped in a good one and road tested it. It idles smooth and runs great up to 3000 rpm. Above that it falls on its face and seems to be running out of fuel. Well the gas gauge didn't work either, so I put in a new fuel pump/sender and a filter.No change. I pulled the MAF sensor connector to force it into closed loop as I had a similar symptom caused by a bad MAF on a Suburban once. No change.Here's the really strange part... If I stay in the gas and struggle it up to like 4000, it clears out and pulls strong as it should.No SES light, and the OBDII port does not seem to be working.Any ideas?
No change. I pulled the MAF sensor connector to force it into closed loop as I had a similar symptom caused by a bad MAF on a Suburban once. No change.
Here's the really strange part... If I stay in the gas and struggle it up to like 4000, it clears out and pulls strong as it should.
No SES light, and the OBDII port does not seem to be working.
I got this blazer with a blown transmission. Swapped in a good one and road tested it. It idles smooth and runs great up to 3000 rpm. Above that it falls on its face and seems to be running out of fuel. Well the gas gauge didn't work either, so I put in a new fuel pump/sender and a filter.No change. I pulled the MAF sensor connector to force it into closed loop as I had a similar symptom caused by a bad MAF on a Suburban once. No change.Here's the really strange part... If I stay in the gas and struggle it up to like 4000, it clears out and pulls strong as it should.No SES light, and the OBDII port does not seem to be working.Any ideas?
I got this blazer with a blown transmission. Swapped in a good one and road tested it. It idles smooth and runs great up to 3000 rpm. Above that it falls on its face and seems to be running out of fuel. Well the gas gauge didn't work either, so I put in a new fuel pump/sender and a filter.No change. I pulled the MAF sensor connector to force it into closed loop as I had a similar symptom caused by a bad MAF on a Suburban once. No change.Here's the really strange part... If I stay in the gas and struggle it up to like 4000, it clears out and pulls strong as it should.No SES light, and the OBDII port does not seem to be working.Any ideas?