5.7 GXI rev-limit at 4K RPM

boataway

boataway

Petty Officer 2nd Class
Joined
Aug 4, 2011
Messages
123
in neutral, if I WOT it will bounce back at 4K RPM over and over. Any suggestions on what to check?

I noticed this after a few long hauls, the engine would creep up to 4K, stay there, and only give me about 28 MPH. seemed fishy so I tried it in neutral. Something's up...
 
Last edited:
M

mandmj

Seaman
Joined
Jul 11, 2006
Messages
60
My 5.7 GXi-F does the same thing in neutral. A lot of GM engines have this in the ecu, to prevent overrev in neutral. I doubt that is the cause unless you can pull a code that will tell you something (rinda codemate may help). i'd start w/ Don S. low WOT sticky tho...
 
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