1999 Mazda 626 Idle Stall Shake

1999 MAZDA 626

VICKYW07

MEMBER
1 POST

I have a 1999 Mazda 626, that not always, but sometimes after starting, the front end shakes and stalls. The car will restart ok and will do it again. If I press down on the accelerator to give it more gas after restarting it, the car won't stall. This only happens when in idle. It never dies on me while driving.

Dec 6, 2006 at 12:09 AM

COSMO

✓Experienced Mechanic
347 POSTS

Is your 626 a 2.0L 4cyl? This sounds like either a stuck open BAC valve.....one on top of the throttle body OR a leaking intake gasket.

To test the first one....tap on the BAC valve while it is running with a small hammer. The valce is round with two wires coming out of it with a coolant hose attached to it.

Cosmo...Mazda Tech

Dec 6, 2006 at 3:38 AM

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Suggested Repair

Confirm whether the 626 is a 2.0L four-cylinder. Check the round BAC valve on top of the throttle body for sticking open by tapping it lightly with a small hammer while the engine is running; it has two wires and a coolant hose. Also inspect for a leaking intake gasket.

Conversation Summary

The owner reports a 1999 Mazda 626 that sometimes shakes and stalls at idle after starting, restarts, and can be kept running by adding throttle, but never dies while driving. The expert asks if it is a 2.0L four-cylinder and suggests a stuck-open BAC valve or a leaking intake gasket, with a tap test of the BAC valve while running.

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1999 Mazda 626 Idle Stall Shake

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