Over run
#1
Burning Brakes
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My car occasioanally suffers over run when you switch off the engine.
My mechanic tells me this is normal, i wonder if it is, what dose everyone else think?
My mechanic tells me this is normal, i wonder if it is, what dose everyone else think?
#7
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I can't imagine how your car keeps running after the switch is off, unless you have leaky injectors or oil is getting into the combustion chamber.
I would have to agree with everyone above, this is absolutely not "normal" for an unmodified 993.
Chip
I would have to agree with everyone above, this is absolutely not "normal" for an unmodified 993.
Chip
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#9
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Timing is a possibility. The gas is definitely still there to ignite (postignition) and it is getting a spark from somewhere, I'd put it on a hammer and see what's up.
Only other question is have you changed the type of gas-pardon me petrol-that you are using lately?
Al
Only other question is have you changed the type of gas-pardon me petrol-that you are using lately?
Al
#11
Burning Brakes
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I only use super unleaded 98 RON, usually from BP but sometimes from Shell.
Perhaps I should give a better descrition of what happens, the car sometimes turns over one or twice and the whole car rocks when I turn the ignition off, this I am told is, over run.
I have had both the harness and the distributer caps changed recently and it has been much better, but did it yesterday.
It also doesn't always like to start easily.
Perhaps I should give a better descrition of what happens, the car sometimes turns over one or twice and the whole car rocks when I turn the ignition off, this I am told is, over run.
I have had both the harness and the distributer caps changed recently and it has been much better, but did it yesterday.
It also doesn't always like to start easily.
#12
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Assuming the electrics are functioning normally - and that might not be a good assumption in this case - timing should not be a contributor, because there should be no spark after ignition is switched off. Fuel type should not be a factor since there should be no fuel either, since the injectors would no longer be firing (unlike a carbureted car which keeps supplying fuel as long as the engine is turning and air is being pumped through it).
Greg has a good point - a failing wiring harness can account for many otherwise difficult to explain phenomena.
Chip
Greg has a good point - a failing wiring harness can account for many otherwise difficult to explain phenomena.
Chip
#13
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Join Date: Sep 2003
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I have never experienced a run-on with my 98 and as others have suggested, I don't believe this is normal at all!
Perhaps time for a new mechanic?
Good luck - and keep us posted.
Perhaps time for a new mechanic?
Good luck - and keep us posted.