47RE Lock up problems....
04-25-2006, 05:00 PM
#1
DTR's Locomotive Superhero and the DTR Sweet Tea Specialist
Thread Starter
47RE Lock up problems....
According to an article on TDR i found today when i was visiting the site, the use of tin foil can help solve the TC lock/unlock problems. Its on the homepage for tdr but heres what you do....
I have found the cause of the lock-unlock problem to be a frequency-induced electrical noise into the ground circuit of the battery which causes a fluctuating voltage signal from the TPS to the PCM.
The Solution: Locate the 10-gauge ground wire that runs from the negative post of the passenger battery to the back of the alternator. This wire is often tan with a black stripe.
Starting at the back of the alternator loom where the tan/black striped wire heads for the battery, wrap the wire with a piece of tin foil about 4" - 6" in length. Wrap the tin foil with black electrical tape to secure it in place.
Road test the vehicle. If the problem is corrected, smile.
Tony Garcin
Dunrite Converters
I tried this out today because i was having the lockup problem sometimes while driving and it really did work. I drove the truck be for i did anything to it and felt it lock up and unlock. I came back got out the foil, tape and a few min later i was back driving again. Now it locks up just fine and doesn't feel like its stumbling like it did before. I just thought i'd pass this info on since there always seems to be a thread about lock up problems on here.
One thing i did different is there is a wire coming off the battery on the P-side that grounds tothe fender, I covered it, the one that is blk/tan that goes towards the alt, and the portions of uncovered 10 ga wire that come off the battery ground that have connectors on them. I'll try to post a pic of what i did.
Matt
I have found the cause of the lock-unlock problem to be a frequency-induced electrical noise into the ground circuit of the battery which causes a fluctuating voltage signal from the TPS to the PCM.
The Solution: Locate the 10-gauge ground wire that runs from the negative post of the passenger battery to the back of the alternator. This wire is often tan with a black stripe.
Starting at the back of the alternator loom where the tan/black striped wire heads for the battery, wrap the wire with a piece of tin foil about 4" - 6" in length. Wrap the tin foil with black electrical tape to secure it in place.
Road test the vehicle. If the problem is corrected, smile.
Tony Garcin
Dunrite Converters
I tried this out today because i was having the lockup problem sometimes while driving and it really did work. I drove the truck be for i did anything to it and felt it lock up and unlock. I came back got out the foil, tape and a few min later i was back driving again. Now it locks up just fine and doesn't feel like its stumbling like it did before. I just thought i'd pass this info on since there always seems to be a thread about lock up problems on here.
One thing i did different is there is a wire coming off the battery on the P-side that grounds tothe fender, I covered it, the one that is blk/tan that goes towards the alt, and the portions of uncovered 10 ga wire that come off the battery ground that have connectors on them. I'll try to post a pic of what i did.
Matt
04-26-2006, 12:20 AM
#3
DTR's Locomotive Superhero and the DTR Sweet Tea Specialist
Thread Starter
I'm glad i came across this and it worked, saved me from spending money on a noise filter. i hope this is a fairly premanent, fix only time will tell though.
matt
matt
04-26-2006, 07:48 PM
#4
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Need more info here please. I tried to search the other site but received the same info posted on their homepage.
I just went out and put about 6" foil wrapped around the black and tan cable. Unable to drive tonight, daddy's watching the kids, but the startup back into the garage was much smother sounding. I when I backed the truck out of the garage it sounded like normal real clanky loud like every other Cummins engine I've heard. Wrapped the foil over the 10g wire and it's smooth sounding like a gas engine, nowhere near as much rattle, My imagination I'm sure but.. none the less that's what I heard.
Now just behind the alternator I did find a wear mark in the wire. Wrapped that with electrical tape and then put the foil over top for a total length of wire to the wheel wheel well.
I'll report tomorrow on the drive to work and back, as I have the lock/unlock problem on a regular basis but mostly at 35mph 3rd gear or 45mph 4th gear.
I just went out and put about 6" foil wrapped around the black and tan cable. Unable to drive tonight, daddy's watching the kids, but the startup back into the garage was much smother sounding. I when I backed the truck out of the garage it sounded like normal real clanky loud like every other Cummins engine I've heard. Wrapped the foil over the 10g wire and it's smooth sounding like a gas engine, nowhere near as much rattle, My imagination I'm sure but.. none the less that's what I heard.
Now just behind the alternator I did find a wear mark in the wire. Wrapped that with electrical tape and then put the foil over top for a total length of wire to the wheel wheel well.
I'll report tomorrow on the drive to work and back, as I have the lock/unlock problem on a regular basis but mostly at 35mph 3rd gear or 45mph 4th gear.
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