Question about 1991 Ford Festiva

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Festiva my car cuts out at 3500 rpms in each gear cant figure it out any chance you might know

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My car did the same thing. It was a problem with the EGR system, caused by the EGR valve opening too far when it shouldn't. Disconnect your EGR valve and make sure it is not stuck open. I removed mine and blocked it off with a metal shim and it solved the problem, so then I cleaned out the valve and replaced it and it worked. Check to see if it always cuts out at 3500 rpm or if its only when driving and not while parked in neutral. Also verify if it happens when the engine is cold too or only when cold, for example. Your EGR may be getting wrong signals from the EGR switch or from the EGR position sensor (EVP). You must verify that the EGR is the problem. If its not, it might be a coil problem loosing output at high energy demands. You also could have a fuel volume problem. At high fuel volume demands, the fuel quantity can't keep up. So you see, its a tricky problem to troubleshoot. If none of that worked, run the car at 3500 rpms and pull off each spark plug wire (one at a time) and see which cylinder does not cause a change in engine speed. That would be the problem cylinder and probably that fuel injector.

Posted on Oct 04, 2009

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The rpms seem higher on this vehicle than I am use to seeing, cruising at 80mph the car is hitting 4000rmps. Is this normal for this vehicle?


there is not enough specif details available to be able to be close to exact But I will give an example that you can compare
in a manual transmission with a diff ratio of 3.909 and in 5th gear the rpms for 79 mph is 3200 rpms
the difference between gears is around 250 rpms so if you try to correlate the differences if it was in 4th gear the rpms would be around 3750 rpms so I suspect that the over drive section of the transmission is not engaging ( assuming that it is auto transmission)
so to answer your question , I am saying that it is too high in rpms for that speed and I suspect that the od is not being engaged as the rpms at 80mph I would be looking at around 3200-3500 rpms depending on the diff ratio

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The average vehicle at 74 miles/hr or 120 k/h runs around 3200 rpms
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Car starts and idols fine but once you get it to 4000 rpm it cuts out and then every time you hit the gas it will accelerate then cut out. it doesn't die out until you do this for a long time.


Ya know First i never drive a car at 4ooo RPMS cant remember when but anyway.
Check the Intake Air tube the goes into the air cleaner and throttle body for cracks and cuts and being loose. Fuel Pressure have it checked while you are driving to make sure your noy loosing fuel pressure at the high Rs. Ignition System Factory Plugs and wires no fancy discount suppose to increase horsepower stuff

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