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Guys, I have an Opel Corsa 1.4GSi (2003). ODO-73000+. (1)Recently I am facing lack of accelaration with A/C ON. With A/C OFF seems OK. (2) Beyond 100KMPH with A/C OFF I am loosing accelaration very drastically and hearing huge knocking sound. So far, milage is very good HIGHWAYS-18 with A/C OFF. CAN SOMEBODY HELP ME ON THESE ISSUES PLEASE?
By Sagar 12 December 2009
Expert`s comment:

The problem could be due to misfiring, recommended to check the ignition system ie timing, spark plug connectoin, etc and also fuel supply system.

Answer by Shiva Shankar 12 December 2009

In your next service do the following:
1. engine de-carbonization
2. IAC valve cleaned or replaced
3. Air filter cleaned or replaced
4. Oil service use only synthetic oil no mineral based should be used
5. clean spark plugs, replace if necessary(you should change spark plugs once in 2 years) and adjust timing.
6. try iridium spark plugs....BOSCH brand is good

Answer by Shankar 12 December 2009

i also own an opel corsa.. done 110000 kms.. ceilo 150000.. another ceilo 145000.. iam sure it is your fuel pump.. pipe musty be hard & maybe cracked.. i do not think it is spark plug etc because u must have already tested those by local mechanics..

Answer by Dharmesh 12 December 2009

The problem is in engine oil filter.The oil filter is jammed because of which the engine oil is not reaching towards the engine from the chamber.This results in jerks and rapid loose of acceleration beyond 100khmphs.replace or service it quickly or it will result in engine failure.

Answer by Rahul Yadav 12 December 2009

Must be the engine oil filter as mentioned. An authorised dealer service should settle the diagnosis and treatment. Doesnt yet seem time for an engine overhaul.

Answer by Abraham Kurian 12 December 2009
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