Miscalibrated boost sensor?
07-22-03, 05:39 PM
#1
Rotary Freak
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Location: Ottawa, Ontario
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Miscalibrated boost sensor?
Symptoms:
1) Stock boost gauge needle is below the 0 when the car is in "ON" but not started... almost halfway down the vacuum scale.
2) When boosting in 4th or 5th gear, it goes up to 10 psi.
3) Even at 10PSI, i've never hit fuel cut. Stock pretty much everything, except gauges and wheels. SAFC is in monitoring mode and no changes have been made.
4) The autometer one is showing higher boost than the stock one. Even after going through the metric to imperial conversion.
Now I suspect that the boost sensor is just reporting a lower boost pressure than there actually is. Because of this, I believe my car SHOULD be hitting fuel cut when it goes above 8.6 psi, but it does NOT. and has NEVER.
Is it possible that the boost sensor is screwed up or is there something else wrong?
NO THERE IS NO VACUUM LEAK!!! Take my word.
1) Stock boost gauge needle is below the 0 when the car is in "ON" but not started... almost halfway down the vacuum scale.
2) When boosting in 4th or 5th gear, it goes up to 10 psi.
3) Even at 10PSI, i've never hit fuel cut. Stock pretty much everything, except gauges and wheels. SAFC is in monitoring mode and no changes have been made.
4) The autometer one is showing higher boost than the stock one. Even after going through the metric to imperial conversion.
Now I suspect that the boost sensor is just reporting a lower boost pressure than there actually is. Because of this, I believe my car SHOULD be hitting fuel cut when it goes above 8.6 psi, but it does NOT. and has NEVER.
Is it possible that the boost sensor is screwed up or is there something else wrong?
NO THERE IS NO VACUUM LEAK!!! Take my word.
07-23-03, 02:00 AM
#3
BAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMMM!
S5 gauges are rated in PSI?
and try this: turn your car to ON, take the vacuum hose off the sensor, see what the gauge reads. Sometimes mine reads low too, othertimes it doesn't.
I dunno if that sensor even DOES any thing, as that vacuum line likes to come off rather often , and aside from the gauge not working, the car runs/drives JUST FINE. the idle is a little crappier (due to the vacuum leak, I assume), but the car runs exactly the same.
weird, eh?
S5 gauges are rated in PSI?
and try this: turn your car to ON, take the vacuum hose off the sensor, see what the gauge reads. Sometimes mine reads low too, othertimes it doesn't.
I dunno if that sensor even DOES any thing, as that vacuum line likes to come off rather often , and aside from the gauge not working, the car runs/drives JUST FINE. the idle is a little crappier (due to the vacuum leak, I assume), but the car runs exactly the same.
weird, eh?
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