BER.coalhauler Posted November 15, 2016 Share Posted November 15, 2016 Can someone please assist me!!! I have a 2002 460 that has a surging issue while driving. It's like a two stroke with a power band. One hill it will run excellent the next it's falling on its face. It'll even do it in the level as well. Please someone come to my rescue. Thanks Quote Link to comment Share on other sites More sharing options...
theakerstwo Posted November 15, 2016 Share Posted November 15, 2016 May be the VSS bad Check for a code Quote glenn akers Link to comment Share on other sites More sharing options...
Mackpro Posted November 15, 2016 Share Posted November 15, 2016 If no fault codes, Im thinking check fuel pressure and turbo/boost /intake/air filter first . If truck has single exhaust , check muffler for broken baffle blocking exhaust flow . I've seen the muffler issue more than a few times. Quote Link to comment Share on other sites More sharing options...
BER.coalhauler Posted November 15, 2016 Author Share Posted November 15, 2016 I found it Mack pro, the boost sensor was bad. Thanks guys! Quote Link to comment Share on other sites More sharing options...
Mackpro Posted November 16, 2016 Share Posted November 16, 2016 17 hours ago, BER.coalhauler said: I found it Mack pro, the boost sensor was bad. Thanks guys! Thats good news! Mack uses 2 different part number boost pressure sensors on the ETECH style motors. The early ETECH, the CCRS and the ASET AI use the same sensor. The ASET AC ( EGR cooled 2004 CH/CX and later CXN/CHN ) use a different sensor . They both look exactly the same and the incorrect one can easily be installed . If the wrong one is installed in a AC engine it casuses very low power , check the part # . Also on the 2004 CH and CX with the ASET AC engine , the boost pressure sensor can rub the air filter piping and break the sensor. Add a 45 degree 1/8" pipe fitting to turn the sensor down. Bulletin attached sb273008 2004 Boost pressure sensor.pdf Quote Link to comment Share on other sites More sharing options...
Jackson Posted February 2, 2017 Share Posted February 2, 2017 Was the gauge working. Just curious being im having somewhat of a problem like that with my Ai 460 Quote Link to comment Share on other sites More sharing options...
18speed Posted March 4, 2020 Share Posted March 4, 2020 I have a Mack truck em7 engine surging and running check light with code 4-2....can somebody give me some advise plz Quote Link to comment Share on other sites More sharing options...
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