Horrible Surging Problem
12-03-2008, 08:18 PM
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Horrible Surging Problem
I've got an '01 5spd that's developed a horrible surging problem. The problem seems to happen at anywhere from 1500 to 2000 rpm with colder/wetter weather making things worse. I can feel the truck slowing down and speeding up while the boost gauge follows accordingly. It will happen under accleration and at highway speeds. Yet when I click the cruise control on the truck runs down the road perfectly with no surging whatsoever. This makes me think it could be something to do with the APPS/TPS??? The truck has a FASS, air intake, 4" exhaust, and the Edge Juice w/ Attitude installed. My fuel pressure runs around 14-16 psi(according to the Edge) so I don't think anything is wrong there. I have checked for computer codes myself with and without the Edge installed and nothing shows up. I also recently took the truck into the local Dodge dealer to have them run a diagnostic and nothing showed up for them either. The mechanic blamed the Edge system for causing the problems but the truck surges with the programer removed too - it's just not as noticable. Has anyone had similar problems or know what might be going on? Any help would be greatly appreciated.
Thanks,
Jason
Thanks,
Jason
12-03-2008, 09:08 PM
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Sounds like the APPS to me. Do a search on here for timbo1 or apps. His apps is better than stock and half the price. I've had mine on for at least 6 months and have had no issues at all.
12-12-2008, 08:22 AM
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Cobb...mine is doing similar. It sounds like it is not as obvious as yours though. Two weeks prior, the pedal went totally dead. I was able to reset it. But now have your problem.
12-12-2008, 05:51 PM
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Boost sensor?
My 99 surged real bad under throttle and turned out to be the boost sensor. It sends the ECM a voltage based on the boost it sees. It seems there was a short in the system and once boost reached a certain level (20psi) the boost sensor lost connection. Essentially the ECM thinks there is no boost and defuels, then the boost sensor sends the ECM a signal that there is boost and it refuels etc. Mine was a real PITA untill I replaced the boost sensor.
Could be another issue causing your problem. Something to ponder.
Could be another issue causing your problem. Something to ponder.
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