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idle problem
I have been fighting the ICV for years now but the latest development is beyond me.
I changed the ICV 3 times ,the one before now was new and faulty from day 1 , now i have a used one. So the car runs very well if i drive normal and idles fine at 950 from cold to hot. Problem is when i step on it even for just one run the idle shoots up anywhere from 1200 to 1500 and stays there till i shut the car off and leave it for a while. Anyone have any ideas as to what might be causing this ?
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Catalin '86 DD |
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08-03-2012, 01:24 PM
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idle problem
Even though you have changed it, it still sounds like a sticking ISV to me. The next time the idle problem occurs, try tapping on the body of the ISV with a handle end of a screwdriver or something similar while it is running. If your idle returns to normal, you've found your problem. That's what happens with mine, but I haven't worked up tha ambition yet to tackle the job and change it.
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1988 944 Turbo Guards Red - Black Leather Autothority Stage 2 Chip Set Weltmeister Strut Tower Brace 1984 944 - Sold to rcecale |
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08-03-2012, 02:13 PM
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Proprietoristicly Refined
Join Date: Jul 2001
Location: ~Carefree Highway~
Posts: 5,833
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AFM
Clean the "door" to make sure it swings freely and does not bind. Or do the major "track" clean and adjustment or buy another used. http://forums.pelicanparts.com/porsche-924-944-968-technical-forum/493906-air-flow-meter-fix-refurb.html GL John
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1988 924S, 85,750K ..+ 1987 924S, 154K DD (+15K est. bad odo) |
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08-03-2012, 04:04 PM
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yarfk
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Check the throttle position switch operation.
http://www.clarks-garage.com/pdf-manual/fuel-06.pdf
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------Keith------kfray------yarfk------- 87 944 NA stock 116k 06 Honda Ridgeline 83k 10 Vibe 2.4 AWD (Wife's) Retired My week consist of Saturdays and Sundays 
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08-03-2012, 04:33 PM
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Good ideas , i will check the AFM and TPS tomorrow.
Does anyone have the measurements of the TPS on hand ? i wonder if the bmw 280 120 302 will work ,it's much cheaper ,that one is 70mm between the mounting ears center.
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Catalin '86 DD |
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08-03-2012, 05:04 PM
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yarfk
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Take the TPS apart and clean it , sometimes oil enters the switch and gums up the switch, it is not a complex switch.
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------Keith------kfray------yarfk------- 87 944 NA stock 116k 06 Honda Ridgeline 83k 10 Vibe 2.4 AWD (Wife's) Retired My week consist of Saturdays and Sundays
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08-03-2012, 05:23 PM
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I thought only the WOT side could be cleaned .
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Catalin '86 DD |
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08-03-2012, 05:47 PM
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Keith's Porsche
