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Old 02-23-2009   #9
Jeffvette
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Default Re: New Tune on car, problems

Quote:
Originally Posted by kenthompson View Post
from gmtuners.com code 55 said it was ECM error. They are apparently wrong.

I did notice that the fuel pressure was only 42 running and 42 KOEOFF. Might have to pull the fuel pumps and check the strainers....

Or more mods with Walbro......

They also seem to think the LT5 was made from 91-94.

Code 55 is only set using the secondary system under WOT.
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