Erratic/rough ideling
I have a 1994 968. My problem is the car idels rough while standing still or when taking off. Runs good at higher throttle but as soon as I stop it starts to act up.The following is new or newer. Fuel pump & filter. O2 sensor & cat. Wires cap plugs and rotor. Injectors rebuilt & flow tested seals replaced. Knock and temputure sensor's new. Intake seal replaced and torqued to spec's. Fuel pressure tested & is to spec's. A smoke EVAP/machine was used to detect air leak's none found. I ran a diagnostic and I got code #23 oxygen regulation. Love the car. It's a blast to drive. It's wants to be back on the road. I do have other toy's but the 968 is one of my favorites. If any of my fellow 968 owner's have had a simalar problem(s) and you have corrected it let me know how it was solved. P.S I have lots of parts for 944/968/951/928 and some for other Porsche model's. Thank you for your responces.
Views: 425
Replies to This Discussion
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Permalink Reply by Monte Olsen on
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Could cam timing cause this?
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Permalink Reply by ken on
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Check the idle control valve. Could need cleaning. Have seen a DIY somewhere on cleaning it, but can't remember where.
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I'm wondering if there could be a vacuum leak if it's not the idle control valve, though I will be checking that one myself. <G>
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Said he had a smoke & EVAP(????) machine test with no air leaks found.
Still think it is ICV, but could possibly be the TPS.
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Yipes. You're right. And now I've been bitten by the odometer gear bug. Just happened today. Arghhhh.
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Have repaired odometer gears in both 968's. Hopefully the 951 will be ok for a while.
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I sure hope so, Ken. BTW, I found what I think is a link to the Idle Control Valve thread you may have been talking about. There is also a write-up at www.clarks-garage.com.
Here is one of the links:
http://forums.pelicanparts.com/porsche-924-944-968-technical-forum/...*
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I just found another link to a discussion about the idle control valve that may better apply to this situation.
http://forums.pelicanparts.com/porsche-944-turbo-turbo-s/330312-idl...
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I am going to take a look at it. I did do the dash light upgrade myself, but this looks like something I could mess up pretty easily. :-) I hate to pull the speedo and then be without the 968 for as long as sending it in might take. But that might be smarter given my all-thumbs hands at times.
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The odo. is not as hard as you might think. Need to pay attention to how gear goes in , and be careful how the speedo is handled.
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Permalink Reply by Merdawg968 on
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Hey guys, are you talking about how the odo doesn't move? I had my whole unit replaced and didn't even fix the problem. Can you send me a link on how to fix. I just got back to this forum from the old 968.net forum. Need help. I also want to know how to upgrade the light on the speedo instruments. The low lighting sucks and I recall a fix but can't recall where the discussion was. I will look around in this forum, but if you can pin point me that would be great!
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