1.4 MPI Cold Start problem (Full Version)

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1.4 MPI Cold Start problem

  

oxygenplasma -> 1.4 MPI Cold Start problem (8/11/2004 3:08:12 AM)

Just recently bought a 2000 Polo saloon with an 8-valve 1.4 MPI engine. When I start it from cold it seems to hunt for the correct idle speed, going from about 600 to 1200 rpm and back. It does this for 20/30 seconds. The if I'm driving at very low revs (lets say trying to get out of a tight parking spot) it does this hunting business again when I put a load on the engine. If I can just take off at reasonable pace it seems fine. Once the engine has warmed up it seems to go away. The temp gauge gives a reading of 90 when it's warm. I have bought a coolant temp sensor which I still need to fit (just in case).

  
oxygenplasma -> RE: 1.4 MPI Cold Start problem (8/18/2004 3:08:50 AM)

In hindsight the issue was at low revs in general. Even when the engine was at 90 getting in or out of at tight parking spot was a bit of a nightmare. After changing the coolant temp sensor there was no change. Took off the engine cover to change the two air filters, found quite a bit of oily gunk in the throttle area. Cleaned it up using carb and throttle cleaner.....problem disappeared. When I drained the old oil it looked pretty goupey, may have been the source of the excessive gunk in the throttle causing it to stick at low revs.

  

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