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Old 08-07-2005, 03:28 PM   #1 (permalink)
5.0willy
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2005 duramax wont rev over 2000rpm

My 2005 3500 duramax service truck will not rev over 2000 Rpms. Anybody had this problem? Any ideas?
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Old 08-07-2005, 06:13 PM   #2 (permalink)
bigbird
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mine did that it threw code 88 and 89 which are fuel related. had to put a new fuel pressure regulator in. is your ses light on?
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Old 08-07-2005, 06:52 PM   #3 (permalink)
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Probably a P1093 - insufficient fuel rail pressure.

Shut off truck, restart. Repeat 3 times.
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Old 08-07-2005, 08:11 PM   #4 (permalink)
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Do you have a PTO switch?
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Old 08-07-2005, 08:30 PM   #5 (permalink)
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No, the check engine light is not on. I let it sit for a few hours and now it will run fine, but there is a noticable power loss. It is going to the dealer tomorrow. She has 13,000 miles in two months so it hasnt been sitting around. We will see what tomorrow. Thanks
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Old 08-07-2005, 09:21 PM   #6 (permalink)
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Fuel filter changed yet?? If not setting codes I would check it, had to change mine out at about8k for no power.
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Old 08-07-2005, 10:30 PM   #7 (permalink)
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My lly will power to 3500 using the predator.....However, I threw a code, which caused a "limp" mode as I understand it, and it acted like yours...

Do 10 cycles of key on, key off.....

It worked for me..I probably limped my tranny...



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Old 08-08-2005, 01:38 AM   #8 (permalink)
Black05Duramax
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My truck is doing the same exact thing with the predator installed. I can actually leave the programmer hooked up, and when it goes into limp mode (P1093 code is the code it gives me on the DTC readout.) I can punch "erase DTC's" and the truck will take back off like normal....
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Old 08-08-2005, 07:40 PM   #9 (permalink)
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Limp Mode

I have a 2005 Chevy Duramax and Edge unit with monitor. I have had limp mode happen to me several times....still researching solutions. No SES lights or codes!! I have heard that it has something to do with the fuel line pressure. When running on less than a half a tank the sensors have a low tolerance and throw into a limp mode....cant go over 2000rpm or 30mph.?? I have heard & read all kinds of things. Does anybody know of any permenant solutions? other than some sort of sequence that only solves temporarily.
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Old 08-08-2005, 07:46 PM   #10 (permalink)
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Quote:
Originally Posted by rangerdanger View Post
I have a 2005 Chevy Duramax and Edge unit with monitor. I have had limp mode happen to me several times....still researching solutions. No SES lights or codes!! I have heard that it has something to do with the fuel line pressure. When running on less than a half a tank the sensors have a low tolerance and throw into a limp mode....cant go over 2000rpm or 30mph.?? I have heard & read all kinds of things. Does anybody know of any permenant solutions? other than some sort of sequence that only solves temporarily.
Get your juice updated. I have never set a 1093 with my edge upgraded to ver 1.2 Before i upgraded I would set them once a week or so.
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