RobH
Full Access Member
Per the subject line, my brother has a 2007 Yukon XL Denali with the L92 6.2 liter engine. I have looked through recent posts and did not find a situation like his problem.
Randomly, it will die as he comes to a stop with a warmed up engine. There is not a problem with starting, so it doesn't sound like a bad check valve in the fuel pump. There are no codes being stored. No check engine light. The local Chevy dealer says they have put on a fuel pressure gauge and driven around and found nothing amiss with the fuel pressure. They can find nothing to fix.
He lived at 5,000 feet in Wyoming when he bought it almost two years ago and recently moved to 3,800 feet. It may be worse at elevations up to 10,000 feet in the nearby mountains. The Yukon has about 130,000 miles. The previous owner put a new GM 6L80E in it before selling it. It was up in Canada for part of its life.
Once when I was in it and it died at a stoplight, I floored the accelerator and cranked it until it started. Which suggests that it may have been flooded. I read that the injectors are turned off when the accelerator pedal is floored, but do not know if that is correct.
He has not had to call a tow truck yet, but his wife is spooked by the idea of getting stranded someplace.
Driving with a data logger is not currently possible. Any ideas?
Thank you.
Randomly, it will die as he comes to a stop with a warmed up engine. There is not a problem with starting, so it doesn't sound like a bad check valve in the fuel pump. There are no codes being stored. No check engine light. The local Chevy dealer says they have put on a fuel pressure gauge and driven around and found nothing amiss with the fuel pressure. They can find nothing to fix.
He lived at 5,000 feet in Wyoming when he bought it almost two years ago and recently moved to 3,800 feet. It may be worse at elevations up to 10,000 feet in the nearby mountains. The Yukon has about 130,000 miles. The previous owner put a new GM 6L80E in it before selling it. It was up in Canada for part of its life.
Once when I was in it and it died at a stoplight, I floored the accelerator and cranked it until it started. Which suggests that it may have been flooded. I read that the injectors are turned off when the accelerator pedal is floored, but do not know if that is correct.
He has not had to call a tow truck yet, but his wife is spooked by the idea of getting stranded someplace.
Driving with a data logger is not currently possible. Any ideas?
Thank you.
