04-22-2019, 02:16 AM
stage 2 FPR test is fuel pressure testing,
this ECU can not correct bad fuel pressure for sure is 50,60 ,or 70PSI. The ECU gets lost. (means loses control) and for sure accelerating or WOT)
by lost that means fuel trims gets lost (on a 1996 + car we can scan this and see this live even while driving)
fuel trim has limited scope (range) and if it can not get the O2 to read right , it is lost and burns fuel like a PIG.
that and limphome mode cause RICH, (as sumps spark is perfect)
on your car , fix the CEL lamp dead first
then we do tests to find cause, 1 by 1.
this ECU can not correct bad fuel pressure for sure is 50,60 ,or 70PSI. The ECU gets lost. (means loses control) and for sure accelerating or WOT)
by lost that means fuel trims gets lost (on a 1996 + car we can scan this and see this live even while driving)
fuel trim has limited scope (range) and if it can not get the O2 to read right , it is lost and burns fuel like a PIG.
that and limphome mode cause RICH, (as sumps spark is perfect)
on your car , fix the CEL lamp dead first
then we do tests to find cause, 1 by 1.
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