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The engine stalls while driving. It don't give any warning, it just quits. But it will start right back up. Then it'll run a while then it will do it again. Any help would be appreciated. Thanks


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Location: Oregon
there are many thing that can cause the engine to stall. Driving with a scanner on and watch the data stream may help by being able to see if you lose a reading just before the engine dies. Other wise you have to wait until it dies and won't start again to find the problem


   
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muskihunter wrote:
The engine stalls while driving. It don't give any warning, it just quits. But it will start right back up. Then it'll run a while then it will do it again. Any help would be appreciated. Thanks


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if you have no codes stored to help you look far a problem and the vehicle starts right back up, it will be difficult to find the problem. this is because it starts right back up so that means that everything is working normally again. It is hard to find something wrong when it's not bad when you check it.

driving with a scanner on and graphing your data stream until the engine dies (since you said it would do it again, I am thinking that it would show up on a test drive) you could see what the fuel is doing. If the oxygen sensors show it goes lean and the pulse width goes high to try and compensate then you should have a fuel supply problem. If the fuel looks normal but the cam and/or the crank signal (if available) stops before your VSS signal (the cam and crank sensors share two wires that go to the ignition amp) you may have a problem there. If the cam and crank show they are all working after the engine has already died and you coasted to a stop then you may have lost spark from the ignition module.

since the ignition module output is not monitored like the engine sensors you would then need to drive it with a lab scope hooked up your cam and crank sensors and look at you secondary ignition while driving it around. Watching you secondary ignition pattern to see if it shuts off while driving.

without being able to pinpoint where the problem stems from you will probably be replacing parts to see which one takes care of the problem. And while the sensors are rather cheap ignition modules and fuel pumps can get expensive.

so as I said before, unless it dies and doesn't restart so you can find out what is not working, you will have to try and find it with a scanner hooked up and see what stops working first when it dies. anything else would be guessing.

you could look at your wire harness at see if there is damage to the wiring that could cause problems. Look for somewhere where it may be rubbing through and shorting out something. Make sure you have a good ground for everything and the battery voltage to and from the ignition switch is in good working order.


   
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