Volvo RWD 200 Forum

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245 idles rough after a heat soak, other times OK 200 1993

posted by  jkordzi on  Mon Feb 24 02:58 CST 2003
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last visit: Wed Sep 12 02:43 CST 2001
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My 93 245 has a habit of idling rough after it has run for a while and then sits for 15 minutes or so. Occasionally it will stall. Either reving it up for about 10 seconds or driving it for a minute or two cures the problem. Any other time it idles fine. All the sensors, plus the AMM and the ECU have recently been replaced, plus it has had a complete tune up. I'm thinking that fuel is leaking past one or more of the injectors when the engine isn't running, causing a rich condition when the engine is restarted. I checked the residual fuel pressure and it stayed over 40 psi after 15 minutes. Any thoughts are appreciated.








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    245 idles rough after a heat soak, other times OK 200 1993

    posted by  Smitty on  Mon Feb 24 11:19 CST 2003
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    last visit: Sat Aug 9 22:44 CST 2014
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    Possibly a vacuum leak which gets worse when the car is warm?

    Check the injector seals - spray carb cleaner (or propane) around each one in turn; when the idle speed changes, you've found the culprit.

    Maybe check other vac lines, as well. Is the idle air motor OK?








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      245 idles rough after a heat soak, other times OK 200 1993

      posted by  jkordzi on  Tue Feb 25 05:35 CST 2003
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      last visit: Wed Sep 12 02:43 CST 2001
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      Thanks, but that's not the problem. New seals when I cleaned the injectors. Also, no vacuum leaks. I wouldn't think vacuum leaks anyway because the car will idle fine once it runs a bit after the restart following the heat soak.







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