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  #1  
Old 12-22-2011, 03:45 PM
Troutman Troutman is offline
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Default 5.9L RPMs Jumping

Hello,
I am new to site .. having a problem with my 2000 Ram 1500 5.9L.
When driving down the road and come to a little grade uphill, the tach will jump up and down about 100-200 rpms as the engine is surging. If i stomp on the throttle, the truck will take off strong. I replaced the TPS due to someone else having same problem but this has not helped. I am not sure if it is fuel or electrical. Any ideas what could cause this?
Thanks, Tom
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Old 12-24-2011, 11:42 PM
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ramvan2500 ramvan2500 is offline
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Quote:
Originally Posted by Troutman View Post
Hello,
I am new to site .. having a problem with my 2000 Ram 1500 5.9L.
When driving down the road and come to a little grade uphill, the tach will jump up and down about 100-200 rpms as the engine is surging. If i stomp on the throttle, the truck will take off strong. I replaced the TPS due to someone else having same problem but this has not helped. I am not sure if it is fuel or electrical. Any ideas what could cause this?
Thanks, Tom
most engine surging is going to be computer related, either it be a sensor or the ecm it self, in most cases it's a sensor but in a number of cases it's the ecm. i would probably check the sensors and if they all check out maybe buy another ecm, if that doesn't fix it then keep the ecm on hand it's good thing to keep in the back of the truck. these computers just die die die
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Old 12-25-2011, 05:17 AM
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Nck Nck is offline
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Don't know to much to say on this subject, but I had this problem and it turned out it was a misfiring spark plug. so I did a complete tune up and problem gone.
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Old 12-25-2011, 12:47 PM
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ramfam ramfam is offline
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Have fuel pump pressure tested. it might not be able to keep up.
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Old 12-25-2011, 03:03 PM
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Surging at part throttle but runs great at WOT? Doesn't sound like a fuel flow problem. Did you reset the computer after replacing the TPS?
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