ENGINE OVER REVS AND CAN'T BE DRIVEN

  • Tiny
  • Spikeysteve
  • 2003 Renault Laguna
  • 10,030 miles

Hi help needed ref Renault laguna 2003 2litre petrol
First rev counter wavers up and down when slowing down
Secondly on long journey revs suddenly fly up to 5000 revs but no increase in speed if I pull over and go down gears and pull away it was ok for awhile
Now service light tracking light and electrical fault light comes on. After driving or running engine for 20 mins or so lights come back on engine revs to 5000 and engine goes up n down in revs. If you press accelerator no response also wTer seems to be disappearing via scaife either steam or water droplets.I have changed throttle position sensor the potentiometer and had the ECU checked ( no proplem with the ECU working ok)
So please can you advise me?

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Thursday, June 28th, 2012 AT 2:09 PM

2 Replies

  • Tiny
  • KHLow2008
  • Expert
  • 41,997 posts

If the MIL is indicating, there should be trouble codes. How did you check the ECU? If no trouble codes are present, either the ECU is bad or you have a ground circuit issue.

What do you mean by scaife?

Water, do you mean coolant?

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Thursday, June 28th, 2012 AT 8:08 PM
  • Tiny
  • darront
  • Member

Hi I have same laguna 2003 2 litre petrol same problems
did you ever find out what it was cheers

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Sunday, September 16th, 2012 AT 4:27 PM

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