Maintenance, Engine & Driveline Tech This forum is brought to you by The Speed Syndicate (TSS) in Burnaby.
Discussion of maintaining your engine, transmission, differentails, rear ends, and mods associated with "driveline" parts..
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08-13-2014, 10:08 AM
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#1 | | Head Moderator
Join Date: Dec 1982 Location: Great White Nor
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| Unintended Acceleration
So the first major problem has hit the Saab in the form of unintended acceleration. Well, it only holds the accelerator in position for an extra second or so after lifting my foot off the pedal, but it's enough of an issue that I'm kinda concerned. The caveat is that it only happens when there's an extra load on the engine, specifically the HVAC.
My initial thought was the IAC, but I'm not entirely convinced having the a/c running puts enough of a load on the IAC to cause it to malfunction. I could be completely wrong, though. A search through a few Saab sites also suggest the MAF.
Figured I'd run this by you guys here before I start swapping parts out willy nilly.
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08-13-2014, 10:58 AM
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#2 | | The Brown Reason
Join Date: Jan 2007 Location: Whalley
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Cheapest solution = Clean throttle body, IAC, MAF sensor and go from there. A simple $5 bottle of cleaner could fix your problem if the sensors are all gummed up from years of dirt
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Originally Posted by bcrdukes fuck this shit, i'm out | | |
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08-13-2014, 05:43 PM
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#3 | | 2x Variable Nockenwellen Steuerung
Join Date: Oct 2002 Location: N49.2 W122.1
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OBD2 car right? a scanner should be able to capture live data.
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08-13-2014, 10:29 PM
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#4 | | Head Moderator
Join Date: Dec 1982 Location: Great White Nor
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Don't currently have access to a live data capture scanner. My bluetooth OBD2 scanner stopped working, so my Torque app is useless. lol My wired one is just a cheapo reader.
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08-14-2014, 08:55 PM
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#5 | | Head Moderator
Join Date: Dec 1982 Location: Great White Nor
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So, I've no idea what the Saab people were saying... there's no freakin' MAF on this car!  I sprayed down the IAC. Haven't had a chance to take it for a spin yet as there's currently a heavy rain/lightning storm and my road is literally dirt right now due to them repaving it. It does seem to be idling better, even after turning as many loads as I could. We shall see once the road dries out and I'm able to take it out. Figure I'll tear the throttle body out next if it's still acting up.
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08-18-2014, 11:28 AM
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#6 | | Everyone wants a piece of R S...
Join Date: Mar 2007 Location: Surrey/Richmond
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is it a drive by wire or throttle cable?
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2002 Nissan Sentra SpecV - 2.5L 6 Speed FTW
1974 Chevy Vega Wagon --> RaceCar!
1968 Pontiac Firebird Sprint --> 4.1L I6!
Street Car --> 15.45 | Vega --> 11.65
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08-18-2014, 11:59 AM
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#7 | | Head Moderator
Join Date: Dec 1982 Location: Great White Nor
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Its cable driven. Cleaning the IAC seems to have helped so far, though the idle when coming to a stop with the hvac going still runs a little rough. Gonna pull the TB and clean it later today, plus i figure I'd might as well do a proper tune up. Havent actually done that yet since buying the car | |
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08-18-2014, 01:10 PM
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#8 | | Everyone wants a piece of R S...
Join Date: Mar 2007 Location: Surrey/Richmond
Posts: 365
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check the positioning of the return cable (it should have 2) make sure they are tight, my 01 sentra needed it to be tightened once in a while to have correct pedal feel
__________________
2002 Nissan Sentra SpecV - 2.5L 6 Speed FTW
1974 Chevy Vega Wagon --> RaceCar!
1968 Pontiac Firebird Sprint --> 4.1L I6!
Street Car --> 15.45 | Vega --> 11.65
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08-18-2014, 02:41 PM
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#9 | | To me, there is the Internet and there is RS
Join Date: Apr 2007 Location: Okanagan
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Is it accelerating even after the pedal returns? Reason I ask is I had my stupid pedal sticking under the edge of my floor mat once.
__________________ 1991 Toyota Celica GTFour RC // 2007 Toyota Rav4 V6 // 2000 Jeep Grand Cherokee
1992 Toyota Celica GT-S ["sold"] \\ 2007 Jeep Grand Cherokee CRD [sold] \\ 2000 Jeep Cherokee [sold] \\ 1997 Honda Prelude [sold] \\ 1992 Jeep YJ [sold/crashed] \\ 1987 Mazda RX-7 [sold] \\ 1987 Toyota Celica GT-S [crushed] Quote:
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09-02-2014, 11:26 PM
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#10 | | NEWBIE ACCOUNT!
Join Date: Oct 2012 Location: Vancouver
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Throttle position sensor out of calibration?
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