Detroit 60 Series Surging

Hi guys got a problem also on a 2000 fld with series 60 12.7 detroit. It will not rev higher than 1000rpm when in high range but will rev up in low range. Engine check light on and following codes: unrecognised sid low AI SID:214 FMI:1, 33mid:128 eng input voltage high turbo boost sensor A2 pid:102 fmi:3, 44 mid:128 eng high coolant temp I 1pid:110 fmi:0, 21mid:128 engine input voltage high throttle sensor 12pid:91 fmi:3, 27mid:128 eng input voltage high air temp sensor I3 pid:172 fmi:3. 16mid:128 eng input volt high coolant level sensor I5 pid:111 fmi:3, 14mid:128 eng input voltage high coolant temp sensor I6 pid:110 fmi:3, 14mid:128 eng input voltage high oil temp sensor I7 pid:175 fmI:3. All faults pointing to bad ground! Checked and cleaned all terminals and plugs but still same. Checked sensor voltages all ok. Anyone know what else i could check? Thanx

 

Read an article at the Pittsburgh Power website that the throttle position sensor sometime will cause a spike above 5 volts when completely pushed to the floor. The finally figured this out by measuring the voltage from the potentiometer to the ECM. They were able to solve the problem by putting in a resistor they bought at radio shack for about a buck. Seems when these spikes occur, the ECM tries to recalibrate the throttle position sensor.

http://www.pittsburghpower.com/support/viewtopic.php?f=7&t=860&sid=880d3e7adf5f8d939748871a024b9164

 

I say most likely a bad ground. e.c.m. ground.

 

Check the fuse holder for ECM power wires usually near the batteries or on thee firewall. Possibly internally corroded power wires as well. It's easy to run new fused power wires from the battery to see if that fixes the problem.

 

Ok thanx will give it a try!

 

Generally when you get multiple codes for input voltage, you have an issue with the 5v sensor supply. High voltage is usually caused by a bad ground. Your bad ground is most likely in the harness for the sensors. You'll probably find a chaffed/corroded wire.

 

Any time you get over three codes come up, you want to clean the battery connections and grounds, all the grounds to the cab, and to the block, I personally have found that the the alternator has a high voltage drop from the housing to the frame, I put a #8 or #4 cable from the alternator to the right frame rail. that cures a lot of problems.
Test the power, and grounds to the ECM with a headlight to be sure it is OK. Chasing codes without doing the basics is very expensive, and unproductive.
Just a thought!