Please bear in mind that I am mechanically illiterate!
OK, car is in the dealers at the moment for diagnosis of hesitation problem from cold. Happened every day for about 5 days in a row and has happened maybe 3 times in the previous 18 months of ownership but as it disappeared on these occasions so thought nothing of it. Symptom is that it is very sluggish and hesitant until temp gauge up to normal (3 or 4 minutes), very limited power in any gear. I was thinking coolant temp sensor or MAF?
Sods law that when I took it in yesterday afternoon it did not happen to me. When they started it from cold in the morning it didn't happen to them either but the engine management light came on (that has never happened to me! However, they plugged it in to diagnostics and said they cleared a couple of 'strange codes' that didn't register as anything!
Left the car to cool and test drove it again and the guy says he can now feel hesitation at initial acceleration, so they've kept it in to resume investigation tomorrow.
Car had a remap at AmD 6 months ago, no problems until now. Normally use Optimax but had to put in a £10 worth of ordinary unleaded just before this one. This wouldn't have had an effect would it? Contacted AmD as a precaution and they said the clearing of codes or diagnostic issues shouldn't affect the remap.
Any pointers please what I should expect from the garage? If it was an intermitent fault (eg coolant temp sensor or MAF) would this log codes anyway even if it's working OK at the time of testing? What should they be doing if no more fault codes show up?
Thanks for any advice you can give.
OK, car is in the dealers at the moment for diagnosis of hesitation problem from cold. Happened every day for about 5 days in a row and has happened maybe 3 times in the previous 18 months of ownership but as it disappeared on these occasions so thought nothing of it. Symptom is that it is very sluggish and hesitant until temp gauge up to normal (3 or 4 minutes), very limited power in any gear. I was thinking coolant temp sensor or MAF?
Sods law that when I took it in yesterday afternoon it did not happen to me. When they started it from cold in the morning it didn't happen to them either but the engine management light came on (that has never happened to me! However, they plugged it in to diagnostics and said they cleared a couple of 'strange codes' that didn't register as anything!
Left the car to cool and test drove it again and the guy says he can now feel hesitation at initial acceleration, so they've kept it in to resume investigation tomorrow.
Car had a remap at AmD 6 months ago, no problems until now. Normally use Optimax but had to put in a £10 worth of ordinary unleaded just before this one. This wouldn't have had an effect would it? Contacted AmD as a precaution and they said the clearing of codes or diagnostic issues shouldn't affect the remap.
Any pointers please what I should expect from the garage? If it was an intermitent fault (eg coolant temp sensor or MAF) would this log codes anyway even if it's working OK at the time of testing? What should they be doing if no more fault codes show up?
Thanks for any advice you can give.
