So, my CEL has been off for about 10 days now....>
#16
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the code could reset itself with a vacum leak, depedning on conditions temperature ect.
if you get in the car and go before the secodary air is done running it will abort and not throw and faults and possibly shut off the lamp
also if your car is an 01 it could be as simple as a reflash of the dme there was a bulletion on that 0303
if you get in the car and go before the secodary air is done running it will abort and not throw and faults and possibly shut off the lamp
also if your car is an 01 it could be as simple as a reflash of the dme there was a bulletion on that 0303
#18
Race Car
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A vacuum leak "anywhere" in the system (short of the SAI lines being totaling disconnected) will not cause the system to malfunction and therefore correcting the leak will not fix a problem with the system. The air changeover valve is operated on a low vacuum of 5 in-hg. If your car had a vacuum leak that reduced the engine vacuum to that level, the engine would not even run.
Additionally, simply because you have a high negative or high positive LTFT does not mean you have a vacuum leak or that anything is even wrong with your engine. Identifying a vacuum leak by looking at the fuel trims is, at best, a guess and there are much better and easier ways to determine a leak. Even your STFT will balance out when the O2 sensors activate, eliminating any suggestion of a general leak. Fuel trim is only an indicator if you have a baseline of readings for that specific engine. as many engines run normally with a high positive or negative LTFT..
Additionally, simply because you have a high negative or high positive LTFT does not mean you have a vacuum leak or that anything is even wrong with your engine. Identifying a vacuum leak by looking at the fuel trims is, at best, a guess and there are much better and easier ways to determine a leak. Even your STFT will balance out when the O2 sensors activate, eliminating any suggestion of a general leak. Fuel trim is only an indicator if you have a baseline of readings for that specific engine. as many engines run normally with a high positive or negative LTFT..
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Projekt EPiK (03-30-2021)
#19
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3/98 Carrera2 204,850 miles.. original
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Projekt EPiK (03-30-2021)
#21
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I checked every single fuse under the dash, no response when triggering with the Durametric. Any tips on where to find the relay in the car? Or possibly a hidden fuse box.. there was no fuse indicated for the SAI system that I could find.
#23
Race Car
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There's a 40 Amp Maxi-Fuse in the rear relay panel, yes, behind the seats & under the carpet. The relay is there too.
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Projekt EPiK (03-31-2021)
#24
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