Mazda 626 (V6) - car stumbles at idle and running

1962 MAZDA 626
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ADU
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The car doesnt seem to pickup instantly and also when it is running, sometimes it stumbles. It is irregular though but I experienced a lot of stumbling today (08-Dec-06). At idle I think it stumbles a little, not very sure, it is that mild.

NO lights have come on the dashboard (battery, abs, fuel, .... none of them) There is a lot of fuel in the tank.

The only thing I remember doing in the recent past is that I ran the car very close to emptying the tank.

Could somebody tell me what are the possible reasons for this problem and where do I start to identify the problem?

Thanks,
adu
Dec 8, 2006 at 10:43 AM
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COSMO
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Sounds like you might have an ignition problem, maybe the ignition wires are arcing inside the cyl bore.

Try pulling out the spark plug wires also and looking for large amounts of oil in the spark plug holes.

If you can't find anything. Try your local Mazda Dealer


Cosmo...Mazda Tech
Dec 10, 2006 at 10:09 PM
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I think this problem could be associated with an overheating problem.

I have noticed that the stumbling starts after driving for more than 7-8 miles.

I did not realize there was an overheating problem until a week ago when the heat-gauge went to full and I had to have the car towed to a mechanic.

If there is a overheat problem for whatever reason, the coolant also starts heating up too and since the same cooling system is used to cool the transmission system also, it boils over to this also and starts affecting this system. I have an automatic transmission.

This could be the reason that I feel the car stumbles and the loss of traction when it is changing gears (automatically). The longer the drive it keeps getting worse and to the point that engine revs even with flooring the accelerator.

Could one of the techies post their thoughts on this.

Thanks,
adu
Dec 28, 2006 at 11:16 AM
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