CowboyEdition
Because Diesel
- Joined
- Feb 3, 2013
- Messages
- 192
Hey guys, I'm working on a 2005 CR right now. Just finished overhauling the engine and having some computer problems.
History: Truck came to me not running (injectors removed, etc.) and was programmed with Smarty Jr. Programming g was returned to stock before it came to me. Initially it began eating coolant and suddenly started running rough, hard starting, loping badly when idling cold, white smoke on startup, etc. I compression tested it and #1 had 20lbs so I pulled the engine and tore it down to find the head gasket was blown at number one as well as number 1 compression ring was broken. Injectors were sent in and tested and sure enough number one injector is over fueling and has a high return rate. These are American Eagle stainless body injectors with about 180,000kms on them. Head was gone through at the machine shop and planed. The block was bored .020" over and planed to clean it up as well. Installed Mahle pistons, oem gaskets, ARP 425's, new connector tubes and reinstslled the old injectors for now. New injector is coming to replace #1 but I was hoping to at least get it running, get some heat cycles on it and head retorqued. Every bolt on this engine is torqued to factory spec as per Cummins FSM. This is not my first rebuild.
The engine is currently back in the truck and running. It takes a lot of cranking to get it started and it runs rough when it is idling. It also only runs for 10 minutes before it shuts off for no apparent reason.
Brake and ABS lights are on but no codes for them.
I'm sure the #1 injector is to blame for rough idle and hard starting, no surprise there. But I have P0193 and P0532 codes. I have not charged A/C yet. I'm reading codes with the installed Edge CTS. The CTS shows constant 27,000psi rail pressure reading whether the engine is running or not. If ignition is off, then it shows zero.
Also noticed after driving for 1/2 mile, the rail pressure relief valve is so hot you can't touch it.
P0193 is for high rail pressure voltage. According to my wiring diagrams this is the pinout for the Rail pressure sensor:
PIN 1 - Return
PIN 2 - Signal
PIN 3 - +5V Supply
Checking the pins, I have +5v on both pins 2 and 3 with ignition on and sensor unplugged. Pin 1 has 34 ohms resistance to ground with ignition on and zero ohms with ignition off. I've pulled the plugs on the ECU and checked:
-continuity between pins 3 and 2
-continuity between pin 3 and every other pin in both ECU plugs
-continuity between pin 2 and every other pin in both ECU plugs
Neither have any continuity to anything other than the opposite end of the wire and that's 0.01ohms on both.
Continuity between pins 3 and 2 with the ECU plugged in, ignition off, is 26.14k ohms.
Is this computer shot or am I missing something?
Sent from my SM-G935W8 using Tapatalk
History: Truck came to me not running (injectors removed, etc.) and was programmed with Smarty Jr. Programming g was returned to stock before it came to me. Initially it began eating coolant and suddenly started running rough, hard starting, loping badly when idling cold, white smoke on startup, etc. I compression tested it and #1 had 20lbs so I pulled the engine and tore it down to find the head gasket was blown at number one as well as number 1 compression ring was broken. Injectors were sent in and tested and sure enough number one injector is over fueling and has a high return rate. These are American Eagle stainless body injectors with about 180,000kms on them. Head was gone through at the machine shop and planed. The block was bored .020" over and planed to clean it up as well. Installed Mahle pistons, oem gaskets, ARP 425's, new connector tubes and reinstslled the old injectors for now. New injector is coming to replace #1 but I was hoping to at least get it running, get some heat cycles on it and head retorqued. Every bolt on this engine is torqued to factory spec as per Cummins FSM. This is not my first rebuild.
The engine is currently back in the truck and running. It takes a lot of cranking to get it started and it runs rough when it is idling. It also only runs for 10 minutes before it shuts off for no apparent reason.
Brake and ABS lights are on but no codes for them.
I'm sure the #1 injector is to blame for rough idle and hard starting, no surprise there. But I have P0193 and P0532 codes. I have not charged A/C yet. I'm reading codes with the installed Edge CTS. The CTS shows constant 27,000psi rail pressure reading whether the engine is running or not. If ignition is off, then it shows zero.
Also noticed after driving for 1/2 mile, the rail pressure relief valve is so hot you can't touch it.
P0193 is for high rail pressure voltage. According to my wiring diagrams this is the pinout for the Rail pressure sensor:
PIN 1 - Return
PIN 2 - Signal
PIN 3 - +5V Supply
Checking the pins, I have +5v on both pins 2 and 3 with ignition on and sensor unplugged. Pin 1 has 34 ohms resistance to ground with ignition on and zero ohms with ignition off. I've pulled the plugs on the ECU and checked:
-continuity between pins 3 and 2
-continuity between pin 3 and every other pin in both ECU plugs
-continuity between pin 2 and every other pin in both ECU plugs
Neither have any continuity to anything other than the opposite end of the wire and that's 0.01ohms on both.
Continuity between pins 3 and 2 with the ECU plugged in, ignition off, is 26.14k ohms.
Is this computer shot or am I missing something?
Sent from my SM-G935W8 using Tapatalk
