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Old 07-11-2005, 14:01   #1 (permalink)
Bob
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Engine stalls when air temp gets hot

I have a 1994 Ford Econoline E-350. It runs fine in the morning or
evening. Between the hours of 11 am and 5 pm, when the weather is very
hot, about 100 degrees, it dies after about 20 min. Then it takes a
few hours to cool enough to repeat this. The engine is not
overheating, and the thermostate looks to be working as I can see the
temp changes on the temp gage.
I thought it might be a fuel pump or vapor lock problem. I friend who
works on cars thinks it is electrical, maybe the distributor. Anyone
else have this trouble? Thank you.

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Old 07-12-2005, 00:01   #2 (permalink)
Steve
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Re: Engine stalls when air temp gets hot

Real similar to a problem I had on my truck, so take a look and see.
A small bypass hose near the throttle body was spraying coolant to the
throttle position sensor, shorting it out.
Another thing to look at would be the coolant temp sensor (with a scan tool)
to see if it's accurate.


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Stephen W. Hansen
ASE Certified Master Automobile Technician
ASE Undercar Specialist



"Bob" <UseLinkToEmail@AutoForumz.com> wrote in message
news:1_626710_3fdbb4e30b738d5993ba52f8e379fbad@autoforumz.com...
>I have a 1994 Ford Econoline E-350. It runs fine in the morning or
> evening. Between the hours of 11 am and 5 pm, when the weather is very
> hot, about 100 degrees, it dies after about 20 min. Then it takes a
> few hours to cool enough to repeat this. The engine is not
> overheating, and the thermostate looks to be working as I can see the
> temp changes on the temp gage.
> I thought it might be a fuel pump or vapor lock problem. I friend who
> works on cars thinks it is electrical, maybe the distributor. Anyone
> else have this trouble? Thank you.
>
> --
> Posted using the http://www.autoforumz.com interface, at author's request
> Articles individually checked for conformance to usenet standards
> Topic URL:
> http://www.autoforumz.com/Ford-Engin...ict128512.html
> Visit Topic URL to contact author (reg. req'd). Report abuse:
> http://www.autoforumz.com/eform.php?p=626710



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Old 07-12-2005, 08:01   #3 (permalink)
lugnut
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Re: Engine stalls when air temp gets hot

On 11 Jul 2005 14:37:19 -0400, Bob
<UseLinkToEmail@AutoForumz.com> wrote:

>I have a 1994 Ford Econoline E-350. It runs fine in the morning or
>evening. Between the hours of 11 am and 5 pm, when the weather is very
>hot, about 100 degrees, it dies after about 20 min. Then it takes a
>few hours to cool enough to repeat this. The engine is not
>overheating, and the thermostate looks to be working as I can see the
>temp changes on the temp gage.
> I thought it might be a fuel pump or vapor lock problem. I friend who
>works on cars thinks it is electrical, maybe the distributor. Anyone
>else have this trouble? Thank you.



Ignition modules have been known to act this way. I believe
yours is probably mounted on the fender well or the
firewall. Unfortunately, testing it won't reveal much since
it usually cools enough to work while you are removing it
for testing. BTW, I had the throttle body coolant bypass
hose fail on one a few years back like Steve described.
Check that area for coolant as soon as it quits. Mine was
easy to find since it would leak every time the engine was
revved.

Lugnut
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