Is This Normal
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New User
Joined: Jul 2004
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Is This Normal
Ok I Have A 2002 7.3 Psd 92xxx Mi Since It Started Getting Colder Here Like Below 40 When The Truck Is Sitting Ther Idling It Will All Of A Sudden Go From 650 Rpm To 750 Or 1000 Thenwhen You Hit The Gas Pedal It Goes Back To 650. Then This Started Today It Was About 20 Deg Going Down The Road About 1200-1700 Rpm It Will Put Ot Abnormally Loud Exhaust Not A Whistle Just More Air Then If You Go Higher Or Lower In Rpm It Will Quit Seems Like The Waste Gate Is Stuck But When You Get On It Real Goodyou Can Hear It Blow Off ????
Need Help Dont Really Want To Take It To A Dealer !!!
Need Help Dont Really Want To Take It To A Dealer !!!
Post Fiend
Joined: Aug 2002
Posts: 5,324
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From: Denton,TX
The RPM change is built into the electronics of the truck and yes, it's normal.
The noise your are hearing is the exhaust backpressure valve. When it's cold this valve closes and is supposed to help warm up the truck quicker by restricting the exhaust flow out of the engine.
The noise your are hearing is the exhaust backpressure valve. When it's cold this valve closes and is supposed to help warm up the truck quicker by restricting the exhaust flow out of the engine.
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New User
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Ok Cool Thanks !!! So It Should Quit Whe It Gets Warmed Up ? Or When It Ges Warmer Outside Should I Block Off The Grill So It Will Warm Up It Takes A Longtie To Wam Up Even Hough I Plug It In Every Night ..
Post Fiend
Joined: Aug 2002
Posts: 5,324
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From: Denton,TX
Yes, once the engine is warmed up it should stay open. A diesel takes a while to warm up. The best advice I can give is to plug it in when it's really cold outside and drive it easy and keep the RPM down until it's warmed up. In extremely cold weather, it will take quite a while to warm up and if you sit idling for a while the engine will cool down. If you live in an area with extreme cold you might consider a grill cover to help it warm up quicker. You could also buy/make an auxiliary idle controller that would allow you to idle the truck at a higher RPM in the driveway to warm up. Don't bother letting it idle any longer than it takes (without the AIC) to clear the frost off the windshield, the truck won't fully warm up until you drive it.
