on a 92 E150 econoline van the blower fan for the a/c goes away when i accelerate and the instant i let off the accelerator it blows again. the air stays cool it just stops blowing
Model: E150 van
vacuum is good to the valve, the door is staying open, put a new blower motor but did not help,
Hi, I’m Chris. Welcome and thanks for asking your question!
Are you sure the blower is stopping and the air flow is just not changing to the defrost when this occurs?
yes after checking again it is going to defrost
Thanks for checking Pete.
This means you are losing vacuum. The engine intake produces the vacuum and stores it in the reservoir, then the dash mode doors use it. So all you need to do is find the leak. You need at least 10inhg of vacuum at all throttle ranges to keep enough vacuum to operate the mode doors. So start at the supply to the climate control head to see if it is dropping there which will shorten the area you need to test, to the engine and lines at the engine and reservoir. Below is a ford file to help out.
Thanks for asking your question. Your helping me pay my bills, and I
am hopefully helping you lower your repair bill or at least informing
you of the repair needed prior to getting it fixed.
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Chris, we had to take a few days off for personal reasons and we haven't been able to get back to the van. i'm sure your answer is perfect but could you give us a little more time to get back on it? I'll see to it that you get paid but we just needed to handle a personal crisis.
No problem at all, handle what you need to do. In the event you do go ahead and rate my answer, do understand you can still reply as well can I.
16 years experience with Ford.
we still have not fixed the van. we traced a vacuum motor and thought itwas leaking down but cannot find a replacement. none of the vacuum linesare leaking but the vacuum source may be. we don't know where the sourcecomes from and we cannot find a valve or reservoir.
I am having trouble finding the vacuum reservoir on your older vehicle due to poor diagrams in 92. I know it has one and it is most likely on the passenger side of the engine compartment and probably looks like a 1 Quart metal green bean can about 3 inches in diameter. The black line from the intake feeds this circuit.
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