I have a 51 Mk4 Astra.
The car elec. management light came on a month or so ago and on taking it to a specialist garage they replced the coil pack and the spark plugs after reading the error codes. Brilliant I thought - the end of that....
2 week later the same again...on the motorway and slight loss of power and the light is back on. The garage look at it for free. Same error code - cant see any problems. Only thing that seems to be linked is the in car temp dash which goes up to 70 degrees and the just blank lines on the display. They clear the codes and hand it back having fixed the temp display
Last friday on the motorway ( it always fails on the motorway at 70mph) the lights back on but this times it flashing and the power loss/ throttle response is noticeable. They have looked at it for 2 days and have driven it all over and no problems.
TODAY - driving to work on the motorway and exactly the same happens. I'm off to take it to Vauxhall ( with a kidney for payment!).
Has anyone got any advice or seen similar - they say it CANT be linked to the temp display on the dash BUT when it goes haywire so does my car?? Logic says it got to be linked?
Any help/suggestion appreciated prior to Vauxhall taking my eyes out.