400E won't upshift
04-21-2009, 08:05 PM
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400e
400E won't upshift
Under wide open throttle condition, my 400E won't upshift. I will hit the rev limit all the time. I recently swapped out the ecm chip for an ebay unit that removes the cold start upshift delay and that didn't help. Actually it's worse now because the chip also removes the rev limit. So now the car redlines unless I let off the accelerator. Any ideas?
