2001 auto 7.3 warming up weird....help - Ford Powerstroke Diesel Forum
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Old 02-10-2009, 07:17 AM
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2001 auto 7.3 warming up weird....help

hi,
i have a 01 Excursion and when i start it up after running for about 1-2 min it starts making a kind of hissing noise out of the exhaust like its building up pressure. But it doesn't sound like their is something wrong but i just what to know whats going on. it also bump the RPM up to about 1000-1100 and not the 500-600RPMs like its idles when its warm. again i think its just trying to warm up the motor, but i just what to make sure noting is wrong.
Thanks a lot
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Old 02-10-2009, 07:32 AM
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that's the ebvp closing to help warm up the motor quicker, perfectly normal
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Old 02-10-2009, 10:18 AM
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alright thank you, but how is holding back the exhaust helping it warm up?
Another thing i was wondering about is the overall temp of the motor. it stays just above the C line on the temp gauge. is this normal? i dont need a cover thing for the grill do i?
Thanks
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Old 02-10-2009, 11:48 AM
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Originally Posted by storkerlovr View Post
alright thank you, but how is holding back the exhaust helping it warm up?
Another thing i was wondering about is the overall temp of the motor. it stays just above the C line on the temp gauge. is this normal? i dont need a cover thing for the grill do i?
Thanks
Diesels have to work a little to warm up. Adding a little back pressure and making the idle a little faster will allow them warm. Temp guage seems a little cool. I would check the thermostat before I covered the grill. Mine has no trouble in -20 temps warming up and running fine and I have never covered the grill.
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Old 02-10-2009, 12:38 PM
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Quote:
Originally Posted by storkerlovr View Post
alright thank you, but how is holding back the exhaust helping it warm up?
Another thing i was wondering about is the overall temp of the motor. it stays just above the C line on the temp gauge. is this normal? i dont need a cover thing for the grill do i?
Thanks


Your fine... The temp gauge is an idiot light, moves once the water temp reaches 160 or so...
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Old 02-10-2009, 05:29 PM
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alright thanks
ive driven farm tractors a lot more that diesel trucks and im starting to see that they are both very similar. and i love it!
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Old 02-10-2009, 05:32 PM
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Nothing to worry about, every one of our trucks do it
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Old 02-10-2009, 05:33 PM
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Just as everyone said, adding backpressure is just recycling hot air into it.
My temp gauge sits at the O when at normal temps. It takes like 20 mins to warm up lol
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Old 02-10-2009, 05:37 PM
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Normal. If you are good with wiring you can turn that valve into an exhaust brake.
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Old 02-10-2009, 08:50 PM
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haha, when i first bought my truck i thought it was going to take off in park. this hiss is so darn loud in the winter when its colder than usual.

is it normal to be louder the colder it is?
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