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Thread: Erratic start up and idle

  
  1. #1
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    Erratic start up and idle

    Its only recently started to happen, but sometimes when i start my car up (mark 4 1.6 twinport) it revs itself for about 2 or 3 minutes, and then settles down. If i rev it hard it clears, and if i switch it off then on again it clears. No lights have come up on the dash, and im not 2 sure what to do!

    Should i perhaps look into changing the plugs and cleaning the throttle body?

    Oh and the dam thing sounds like a diesel now and then, not like my corse that was smooth sounding like a petrol should be!

    Help me!

    Cheers!

    Jon
    Bass, the final frontier

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    ganda_sxi's Avatar
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    Mine also does this jon (1.6 16V), and also clears when I blip the throttle, although haven't tried turning the engine off and on again.
    Thought it was an auto-choke type cold start thing to warm the engine up quicker.
    Although if yours has only recently started doing it then doesn't look like it is.
    Anyone else got experience of this?

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    dannysport18's Avatar
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    all cars will do this its
    its to warm the car up when cold
    you should leave the car to warm up for 2 to 4 mins in this cold well any time you drive the car
    let it warm up for a few mins

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    Teejay's Avatar
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    if I start mine up in the cold, and just drive off in the morning, it idles realy badly when stationary all morning.

    if I start it up, leave it for 2-3 mins, then drive off, it purrs like a cat. sometimes it's idling with so little noise and no vibration, I think I've stalled - but haven't yet......
    0-60 in 6.5 secs and 48mpg- winner!

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    the problem now just doesnt happen on a cold start up! last night i had been driving for about an hour home, stopped for petrol, (so engine will be well warm after the run) and it started reving itself again! grrr! It revs to about 1500 and down to 500. Any ideas?
    Bass, the final frontier

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    how old is the car ??
    the tb could be on the way out

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    Eeek! i hope not! Its a 53 reg!! Perhaps it just needs a clean :S
    Bass, the final frontier

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    Problem solved! An oil change (as it was due for one) and a strip down and clean of the throttle body and the car works fine now! A quick job to do, and is like new now!
    Bass, the final frontier

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