Truck wont rev much past 2k rpm no codes

johnny89345

New member
Nov 29, 2024
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1
New yoek
My lbz has been acting up the last few weeks. It was breaking up in the upper rpms a few weeks ago, I fixed a leak at the filter housing with a housing delete kit. Then a week or so goes by and my truck doesn't want to rev much past 2k rpms. Sometimes if I stay on the throttle it'll rev up. Most of the time won't. While it's acting up I check rail vs desired pressure with my efilive and it seems to be on the money. I have no codes. What do you guys recommend. Btw the truck has a rail plug/fitting, full hsp kit, full exhaust, 66mm ddp turbo, ad165 lift pump, and a ddp tune.
 

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2004LB7

Well-known member
Dec 15, 2010
7,051
2,192
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Norcal
Probably going into limp mode but codes are turned off. Makes diagnose difficult

MAF seems low for that RPM
 

Bdsankey

Vendor
Vendor/Sponsor
Feb 1, 2018
4,209
1,310
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Larsen, Wisconsin
I'm sorry I'm doing my best taking pics as I drive. How do I data log? And no haven't spoke to my tuner yet.

This should help.


Then, when you need to pull the log files off you can follow this link. Compress the log(s) into a .zip file and you can attach here no problem.