GMC Hauler
10-04-2010, 17:32
As per my usual MO, I am ready to start a move in 2 weeks, and am having some sort of issues related to a vehicle.
Everything started when I noticed the fluid leaking under the vehicle:
21 Aug 10: replaced hydroboost, found it to be leaking.
14 Sep 10: Sub would not start after cranking. Batteries were weak(known issue), but would not start after repeated cranking with another vehicle connected and running (for 15 minutes). Fuel solenoid could be heard and felt clicking on and off with the key. Lift pump could be heard running. Glow plug relay cycles normal. Fuel came out of the fuel manager drain line. Still no start. No codes in computer.
15 Sep 10: came back, replaced batteries, had to crank for several more minutes, finally started and ran fine, very little smoke after starting (i would expect a lot if i had flooded it).
19 Sep 10: Checked glow plug resistance, found one bunt out.
20 Sep 10: Changed oil, took sample. Replaced burnt out glow plug. Looked at fuel like on frame rail. Not rusty. Lift pump somewhat rusty. Looked at fuel manager. Heater wire had insulation pulled out of unit.
27 Sep 10: Replaced Fuel manager with new model including sensor, heater and new filter. Replaced fuel line from fuel manager to injection pump, severly cracked inside line. Replaced fuel line from metal line to fuel manager, severely cracked. Believed I had the problem licked now.
29 Sep 10: Sub took 2 minutes of on and off cranking to start. When it started, ran just fine, no issues.
01 Oct 10: Replaced fuel line from Fuel manager to drain valve. Small amount of cracking. Replaced rubber fuel line from metal line in back of engine to metal line running in valley, not cracked at all. Replaced small rubber line on top of lift pump to metal fuel return line, small cracking. Replaced fuel cap. Checked lift pump pressure while lift pump running, vehicle off: 7 PSI, while vehicle running, 5 PSI. Messed with wires under dash, checking on connection for my trans temp gage. Vehicle does not start. All gages work properly, plugs glow, but no solenoid click on starter, and no starter under hood relay click. Pushed fist under dash into wiring mess, vehicle started. Unknown cause. Vehicle has seemed to start somewhat slower (starter rolls slower).
02 Oct 10: Vehicle shuts of on wife after going up hill to leave driveway. Waits 2 minutes and restarts, no issues. Drives fine. I take vehicle out later that day, drives fine, feel one “fish bite”. Took out for 20 more minutes, no issues. Checked all connectors under drivers dash, none loose. Vehicle has seemed to start somewhat slower (starter rolls slower).
03 Oct 10: Drove 3 hours. At start, starter rolled slow like a weak or dead battery, but engine started. At end of driveway, notice a slight stumble, disregard as maybe my imagination. Drive for 20 minutes, then get on highway. After 10 or so minutes on highway a cruising speed (70 mph), feel one definite fish bite. Nothing after that. Set cruise control, works fine, then after a few minutes, disengages on its own. Cruise does this several times. Stopped using cruise for an hour. Use it later for 40 miles with no issue. Felt metal plate that PMD is mounted to, barely warm. No Codes in computer. No SES.
04 Oct 10: Started Suburban before taking batteries to store to get tested. At start, starter rolled slow like a weak or dead battery, but engine started., and shuts off after 1 minute. Restarts fine. Batteries tested fine at store. Reinstalled batteries, checked all connectors clean and resistance low at about 0. Sub still rolls very weak with batteries, but starts. While looking at wiring under dash, suburban rev’s itself up and back down. Oil sample comes back, no excess fuel in oil (thought that if the Sub was flooded and sat overnight, it might wash fuel down past rings and be seen in oil sample). No codes in computer. No SES.
I need some help. I thought I might have a leak in a fuel line, but now I am thinking most of this is related to a PMD. I have the Heath PMD, at least 6 years old. Injection pump has 140K on it. 179K on vehicle. Original PMD on side of injection pump, worked when first disconnected for Heath PMD. Vehicle makes plenty of smoke and boost, lots of power.
Can PMD cause cruise to disengage, or might that be another issue (like the brake switch).
Is it possible that excessive cranking has caused the starter to go bad? It is original.
Please advise. I have a short amount of time to fix this before I move the RV and family 1000 miles.
Roger
Everything started when I noticed the fluid leaking under the vehicle:
21 Aug 10: replaced hydroboost, found it to be leaking.
14 Sep 10: Sub would not start after cranking. Batteries were weak(known issue), but would not start after repeated cranking with another vehicle connected and running (for 15 minutes). Fuel solenoid could be heard and felt clicking on and off with the key. Lift pump could be heard running. Glow plug relay cycles normal. Fuel came out of the fuel manager drain line. Still no start. No codes in computer.
15 Sep 10: came back, replaced batteries, had to crank for several more minutes, finally started and ran fine, very little smoke after starting (i would expect a lot if i had flooded it).
19 Sep 10: Checked glow plug resistance, found one bunt out.
20 Sep 10: Changed oil, took sample. Replaced burnt out glow plug. Looked at fuel like on frame rail. Not rusty. Lift pump somewhat rusty. Looked at fuel manager. Heater wire had insulation pulled out of unit.
27 Sep 10: Replaced Fuel manager with new model including sensor, heater and new filter. Replaced fuel line from fuel manager to injection pump, severly cracked inside line. Replaced fuel line from metal line to fuel manager, severely cracked. Believed I had the problem licked now.
29 Sep 10: Sub took 2 minutes of on and off cranking to start. When it started, ran just fine, no issues.
01 Oct 10: Replaced fuel line from Fuel manager to drain valve. Small amount of cracking. Replaced rubber fuel line from metal line in back of engine to metal line running in valley, not cracked at all. Replaced small rubber line on top of lift pump to metal fuel return line, small cracking. Replaced fuel cap. Checked lift pump pressure while lift pump running, vehicle off: 7 PSI, while vehicle running, 5 PSI. Messed with wires under dash, checking on connection for my trans temp gage. Vehicle does not start. All gages work properly, plugs glow, but no solenoid click on starter, and no starter under hood relay click. Pushed fist under dash into wiring mess, vehicle started. Unknown cause. Vehicle has seemed to start somewhat slower (starter rolls slower).
02 Oct 10: Vehicle shuts of on wife after going up hill to leave driveway. Waits 2 minutes and restarts, no issues. Drives fine. I take vehicle out later that day, drives fine, feel one “fish bite”. Took out for 20 more minutes, no issues. Checked all connectors under drivers dash, none loose. Vehicle has seemed to start somewhat slower (starter rolls slower).
03 Oct 10: Drove 3 hours. At start, starter rolled slow like a weak or dead battery, but engine started. At end of driveway, notice a slight stumble, disregard as maybe my imagination. Drive for 20 minutes, then get on highway. After 10 or so minutes on highway a cruising speed (70 mph), feel one definite fish bite. Nothing after that. Set cruise control, works fine, then after a few minutes, disengages on its own. Cruise does this several times. Stopped using cruise for an hour. Use it later for 40 miles with no issue. Felt metal plate that PMD is mounted to, barely warm. No Codes in computer. No SES.
04 Oct 10: Started Suburban before taking batteries to store to get tested. At start, starter rolled slow like a weak or dead battery, but engine started., and shuts off after 1 minute. Restarts fine. Batteries tested fine at store. Reinstalled batteries, checked all connectors clean and resistance low at about 0. Sub still rolls very weak with batteries, but starts. While looking at wiring under dash, suburban rev’s itself up and back down. Oil sample comes back, no excess fuel in oil (thought that if the Sub was flooded and sat overnight, it might wash fuel down past rings and be seen in oil sample). No codes in computer. No SES.
I need some help. I thought I might have a leak in a fuel line, but now I am thinking most of this is related to a PMD. I have the Heath PMD, at least 6 years old. Injection pump has 140K on it. 179K on vehicle. Original PMD on side of injection pump, worked when first disconnected for Heath PMD. Vehicle makes plenty of smoke and boost, lots of power.
Can PMD cause cruise to disengage, or might that be another issue (like the brake switch).
Is it possible that excessive cranking has caused the starter to go bad? It is original.
Please advise. I have a short amount of time to fix this before I move the RV and family 1000 miles.
Roger