Having problems with your 1995 Ford Windstar ?

What causes the engine to surge and cut out while driving?

Posted / edited by AnonymousUser on : 13-07-2020

Answers :

Ok,you have covered most of the basics. First inspect the PCV system. If the valve is high mileage,change it.Also check the PCV rubber components for deterioration.Oil will soften them up and cause them to split and leak vacuum.Next, you need to try the back pressure test.You can do this by attaching a vacuum guage to a manifold vacuum port and drive the unit. The gauge should drop as you accelerate and come back up to about the same place it idles at. If it drops off toward zero and stays down,there is an exhaust restriction.
\015\012 If this is good,then you can try disconnecting the MAF sensor and driving it again. The check engine light will come on,but the PCM will ignore the input and use look up tables.This will eliminate a MAF/BARO problem. If the vehicle runs correctly,the concern is in this system.
\015\012 After this,you need to have the system connected to a scanner and evaluate what is going on. Things to look at are Baro Hz,long and short fuel trim,maf voltage,coolant temperature,tp position and O2 sensor voltage.Make sure to take readings at idle and during test drive.These readings,along with any stored codes should point you where the concern is originating.
\015\012 Perform these tests and if you do not find the concern,send me the results and I will help you sort it out. I hope this helps.If you need anything else,drop me a line.Thanks,Chuck
Feul delivery problem or ignition problem
Repair Help & Product Troubleshooting for 1995 Ford Windstar

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