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canyonblaster
Joined: 20 Aug 2012 Posts: 391 Location: Denver, CO, USA
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Posted: Sat May 13, 2017 5:47 am Post subject: Car holding vacuum and making boost but AFR gauge is wonky |
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Guys,
My car has Dan's Intercooler kit. Love it. Car was running great, making 10 psi consistently and the boost gauge works fine. The AFR gauge WAS working fine, showing approx 14.7 at idle and around 10-11 at WOT/ on boost.
The AFR gauge is now just wonky, all over the place. Acts like it has a short but the power is constant (light doesn't flicker, etc).
Car runs fine. Boost gauge has no issues and the car doesn't drive any different. Porsche mechanic says car holds vacuum and makes boost just like it was previously.
Is it possible that the wide band Ox Sensor that feeds info to the AFR gauge went bad? Or the gauge went bad? _________________ PCA Licensed Club Racer & Driving Instructor Current P cars: 1981 931
Past P cars, 1985 944, 1987 951, 1990 911 C4, 2002 Boxster S, 2005 996 GT3, 2013 911 C2S
Daily Driver P cars: 2008 Cayenne GTS, 2013 Cayenne GTS |
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Carrera RSR
Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK
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Posted: Sat May 13, 2017 6:18 am Post subject: |
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Innovate AFR sensor/gauge? Mine needed constant recalibration. Got fed up with it. Sold it. Bought a Zeitronix. Never looked back. _________________ 1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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canyonblaster
Joined: 20 Aug 2012 Posts: 391 Location: Denver, CO, USA
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Posted: Sat May 13, 2017 6:22 am Post subject: |
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AEM analog...
Carrera RSR wrote: | Innovate AFR sensor/gauge? Mine needed constant recalibration. Got fed up with it. Sold it. Bought a Zeitronix. Never looked back. |
_________________ PCA Licensed Club Racer & Driving Instructor Current P cars: 1981 931
Past P cars, 1985 944, 1987 951, 1990 911 C4, 2002 Boxster S, 2005 996 GT3, 2013 911 C2S
Daily Driver P cars: 2008 Cayenne GTS, 2013 Cayenne GTS |
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Carrera RSR
Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK
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Posted: Sat May 13, 2017 6:31 am Post subject: |
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Some need calibrating. Sensor can go bad. _________________ 1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252 |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11724 Location: PacNW
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Posted: Sat May 13, 2017 1:49 pm Post subject: |
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Pretty simple device. Unless there is a wiring fault you may be seeing an actual fueling problem. _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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ideola
Joined: 01 Oct 2004 Posts: 15548 Location: Spring Lake MI
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Posted: Sat May 13, 2017 10:12 pm Post subject: |
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It's an AEM unit, and I do not have the recalibration issues with mine that are commonly reported with the Innovate stuff.
It is almost certainly a failed sensor due to the <ahem> event that you experienced. _________________ erstwhile owner of just about every 924 variant ever made |
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canyonblaster
Joined: 20 Aug 2012 Posts: 391 Location: Denver, CO, USA
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Posted: Wed Jun 14, 2017 2:54 am Post subject: |
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Thx guys. We replaced the sensor. AFR gauge is same, wonky, all over the place. I am taking the car to better shop, one that has smoke and can fix it. _________________ PCA Licensed Club Racer & Driving Instructor Current P cars: 1981 931
Past P cars, 1985 944, 1987 951, 1990 911 C4, 2002 Boxster S, 2005 996 GT3, 2013 911 C2S
Daily Driver P cars: 2008 Cayenne GTS, 2013 Cayenne GTS |
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924-76
Joined: 05 Jun 2006 Posts: 1475 Location: Ontario, Canada
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Posted: Sat Jun 17, 2017 8:51 pm Post subject: |
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Rasta Monsta wrote: | ... you may be seeing an actual fueling problem. |
Have you check you fuel pressure? Could be a faulty WUR. _________________ 1976 924 N/A ROW SOLD
1980 931S
1981 931 Part car RIP |
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