fuel fills intake manifold


Asked by Oct 12, 2015 at 11:50 PM about the 1995 Ford Aerostar

Question type: Maintenance & Repair

I fixed the problem that lasted 3 days. It ran great. The fuel regulator.
diaphragm was broken, & was letting fuel into the intake manifold.
Now it has happened again. A new fuel filter & fuel pump was also
put in about a month ago.If it is the regulator again, what would cause
it to break so quickly? Oh, this is a 4.0 1995 ford aerostar van. A
pain to work on anything, very little room.

6 Answers

Tom Harmon

I recommend you put a pressure test on your pump and make certain your return line is not blocked

1 out of 1 people think this is helpful.

Yeah sounds good. My next thing was to check for return blockage. It's just that it ran so good for a few days. Thanks Tom.


BTW is there a check valve on the return line?

Tom Harmon

the only check valve I'm aware of is in the supply side not the return

1 out of 1 people think this is helpful.

Ok, found the problem. The return line at the tank had spun & it caused a kink in the return line. This caused pressure to build up which broke the diaphragm. .Fuel went through the vacuum line & flooded the intake manifold. Thanks again Tom, you were right.

Tom Harmon

thank you

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