Power loss under load
I have a 2002 Cummins with 5 speed transmission with an ongoing power loss issue under load. I have replaced the fuel pump system with and Airdog II system [preset to 17 psi] (no change) and replaced the VP44 injection pump ( more power empty) but still have an issue when pulling a loaded trailer. Sometimes it even loses power/speed going downhill. Can't get it to wind up. I KNOW it is capable of more because occassionally it will pick up power/speed going uphill in high gear. I actually have to let off on the throttle when I hit 75. Otherwise, it is pedal to the metal and constant shifting between 4th and 5th just to maintain 50-55 on level ground. I plan on increasing fuel pump pressure to see if it helps, but don't believe it will. Any suggestions?
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if your truck is smoking bad during all of this id check the turbo and its wastegate actuator. and do you have any codes? good be a number of things causing this problem.
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your fuel pressure is fine. try cleaning your map sensor.
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No codes and no smoke that I am aware of. Been driving at night so hard to see. Getting ready to make another trip so I will watch closer. Thanks
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is there a loose intercooler boot maybe?
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sounds like your going in and out of limp mode. check the codes. i forgot to plug my map sensor back in when i took my programmer off and this is how it drove.
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if you got a chip check the connections for it at the map sensor plug or it might be loose wire to your vp44
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same problem here stock 99 with 6 tires vp44 was bad liftpump toast map and iat and crank and cam sensor replaced
still have same problem no power no leaks in my boots or intercooler i dn w =haTF is going in i just keep dumping money latest push on petal no go i think its time for the timbo apps any one with the same problem let me know i am tired of it little smoke when i start at a light is all i can tell you no codes except the apps low blah blah HELP ME I AM 3000 in parts and still buying |
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