Attention: TDR Forum Junkies I just bought a 02 3500 Ho 6spd 250k mi for cheap from a guy that wanted to get rid of it and didn't want to put anymore money into it.
What his problems were when he had it:
Intermittent no start, bucking, and low power. The shop he took it to checked it out and they put a fuel filter in it and wouldn't prime, so they replaced lift pump/filters air+fuel/sending unit in tank(fuel gauge was off) -Also codes 0232/0237/0112 replaced MAP + IAT sensors. No better, They took it to the Dealer and they Replaced ECU. After that Truck starts great every time no codes runs smooth just has low power. The dealer just took it around the block, didn't test drive it very far. It seems ok for power at low speeds driving normal, but will only do about 50-60mph
This is when I bought it from him. I put gauges on it and a new vp44 NO CHANGE
Tests I've done Fuel is about 12psi at idle and drops to about 6-7 psi with load- Max Boost on gauge is 3-4 psi I can get egt up to about 700 max Did fuel volume test on lift pump 38-42 oz in 25sec with no air bubbles (the spec I found said 45oz in 25 sec)- Tested MAP sensor Pin A org. to Pin B blk/blue has 5v key on unplugged. Have access to Snap On Scan Tool. It says the MAP sensor signal voltage to ECU key on is . 9v 12psi ??? It says it should be . 5v if I blow compressed air to the removed sensor the voltage and boost shown on scanner go up 20-30 psi... If i try to pull a vacuum on sensor it will go down a little but not much, maybe . 7v and 7psi roughly, wasn't a real good seal. The shop that replaced the MAP sensor said the same thing, the original showed 12psi key on or idle no change if revved up either. I've got another sensor coming in case it's bad but seems strange they would do the same thing. One place online said that the sensor measures atmospheric psi instead of 0psi so 12psi would be close as we are at 6000+ft in elevation (14. 7psi @sea level)????? And this truck will make absolutely no smoke at all, black white or otherwise, and runs pretty smooth. Did however do a cyl. cutout test and #6 didn't seem to make as much of a difference to idle sound as others. . Turbo seems ok to me, spins nice, took boost tube off at intake horn and ran engine, it had what seemed like good flow coming out, had some force to it when holding hand over tube when revving up. Pulled valve cover and springs look ok as do the bridges on valves... .
Sorry for the long post, but i am at a loss... . Maybe new MAP sensor will fix it and I just wasted a bunch of your time, should be here next week. Going to double check gry/red wire going to ECU, shop said they did that though... . Maybe dealer messed up ECU (this dealer has done it before) What do think about Bad Injectors -All at once ???????
THX
What his problems were when he had it:
Intermittent no start, bucking, and low power. The shop he took it to checked it out and they put a fuel filter in it and wouldn't prime, so they replaced lift pump/filters air+fuel/sending unit in tank(fuel gauge was off) -Also codes 0232/0237/0112 replaced MAP + IAT sensors. No better, They took it to the Dealer and they Replaced ECU. After that Truck starts great every time no codes runs smooth just has low power. The dealer just took it around the block, didn't test drive it very far. It seems ok for power at low speeds driving normal, but will only do about 50-60mph
This is when I bought it from him. I put gauges on it and a new vp44 NO CHANGE
Tests I've done Fuel is about 12psi at idle and drops to about 6-7 psi with load- Max Boost on gauge is 3-4 psi I can get egt up to about 700 max Did fuel volume test on lift pump 38-42 oz in 25sec with no air bubbles (the spec I found said 45oz in 25 sec)- Tested MAP sensor Pin A org. to Pin B blk/blue has 5v key on unplugged. Have access to Snap On Scan Tool. It says the MAP sensor signal voltage to ECU key on is . 9v 12psi ??? It says it should be . 5v if I blow compressed air to the removed sensor the voltage and boost shown on scanner go up 20-30 psi... If i try to pull a vacuum on sensor it will go down a little but not much, maybe . 7v and 7psi roughly, wasn't a real good seal. The shop that replaced the MAP sensor said the same thing, the original showed 12psi key on or idle no change if revved up either. I've got another sensor coming in case it's bad but seems strange they would do the same thing. One place online said that the sensor measures atmospheric psi instead of 0psi so 12psi would be close as we are at 6000+ft in elevation (14. 7psi @sea level)????? And this truck will make absolutely no smoke at all, black white or otherwise, and runs pretty smooth. Did however do a cyl. cutout test and #6 didn't seem to make as much of a difference to idle sound as others. . Turbo seems ok to me, spins nice, took boost tube off at intake horn and ran engine, it had what seemed like good flow coming out, had some force to it when holding hand over tube when revving up. Pulled valve cover and springs look ok as do the bridges on valves... .
Sorry for the long post, but i am at a loss... . Maybe new MAP sensor will fix it and I just wasted a bunch of your time, should be here next week. Going to double check gry/red wire going to ECU, shop said they did that though... . Maybe dealer messed up ECU (this dealer has done it before) What do think about Bad Injectors -All at once ???????
THX
