Cylinder Wash vs. ECU Failure
#22
I only know for sure about the 4.2 engine but according to JTIS
Note: If CKP Sensor fault exists, engine will start after approximately 5 seconds of
cranking as the ECM will default to CMP Sensor 1 signal for synchronization.
and there will be a P0335 code.
I can't find exact figures for the CPS but the resistance should be a few hundred ohms and with the meter set to AC you should see a small voltage (>200 mV) when cranking.
Note: If CKP Sensor fault exists, engine will start after approximately 5 seconds of
cranking as the ECM will default to CMP Sensor 1 signal for synchronization.
and there will be a P0335 code.
I can't find exact figures for the CPS but the resistance should be a few hundred ohms and with the meter set to AC you should see a small voltage (>200 mV) when cranking.
#24
#25
Stupid car,
#26
#27
#28
Not yet - been without power since the weekend (at home until last night and at work still) so other things have taken priority.
We bought a large standby generator to get the shop up and running again. The diesel bill is not wallet-friendly.
We bought a large standby generator to get the shop up and running again. The diesel bill is not wallet-friendly.
#29
#30
Crank position sensor tested out at ∞Ω - bingo! That will solve it, right?
NOPE. Same problem, but new development it's got a raw fuel smell at the tailpipes.
Pulled all the plugs again. NOW they're all wet... so not only didn't it start but the formerly dry plugs now show signs and symptoms of cylinder wash.
Possibly original plugs, they might as well get changed anyhow - something I was going to put off until ready to do the obviously needed valve cover gasket replacement, which was going to be done with the preventive secondary timing chain tensioner replacement... This car is becoming a money pit and lawn ornament.
NOPE. Same problem, but new development it's got a raw fuel smell at the tailpipes.
Pulled all the plugs again. NOW they're all wet... so not only didn't it start but the formerly dry plugs now show signs and symptoms of cylinder wash.
Possibly original plugs, they might as well get changed anyhow - something I was going to put off until ready to do the obviously needed valve cover gasket replacement, which was going to be done with the preventive secondary timing chain tensioner replacement... This car is becoming a money pit and lawn ornament.
#31
Crank position sensor tested out at ∞Ω - bingo! That will solve it, right?
If you wave a screwdriver close to the end of it it should register...it's a simple Hall effect switch.
This car is becoming a money pit and lawn ornament.
It would be if it was in a bay at the main dealer's. If you plan on keeping it, it's worth fixing, if not then get it running and flog it
No spark sounds like a security intervention, have you pressed the inertia switch behind the gas pedal? Any engine codes?
If you wave a screwdriver close to the end of it it should register...it's a simple Hall effect switch.
This car is becoming a money pit and lawn ornament.
It would be if it was in a bay at the main dealer's. If you plan on keeping it, it's worth fixing, if not then get it running and flog it
No spark sounds like a security intervention, have you pressed the inertia switch behind the gas pedal? Any engine codes?
#32
Crank position sensor tested out at ∞Ω - bingo! That will solve it, right?
If you wave a screwdriver close to the end of it it should register...it's a simple Hall effect switch.
This car is becoming a money pit and lawn ornament.
It would be if it was in a bay at the main dealer's. If you plan on keeping it, it's worth fixing, if not then get it running and flog it
No spark sounds like a security intervention, have you pressed the inertia switch behind the gas pedal? Any engine codes?
If you wave a screwdriver close to the end of it it should register...it's a simple Hall effect switch.
This car is becoming a money pit and lawn ornament.
It would be if it was in a bay at the main dealer's. If you plan on keeping it, it's worth fixing, if not then get it running and flog it
No spark sounds like a security intervention, have you pressed the inertia switch behind the gas pedal? Any engine codes?
If you know otherwise please share! I'm at a loss here...
#33
#34
Changing the crank position sensor did not get the engine to fire. However it did trigger the injectors to pulse and now I have a cylinder wash condition. Original ECU is back in the car. I have no way of testing the ignition module at home, and have to work in between storms it seems. It has been since we spoke until today that I could finally get back to working on the car.
#35
#36
I'm getting power out of the relay for the ignition coils so the ignition module - I'd think - is telling the coils it's OK to light up... Just ordered a set of new plugs from WorldPac and will be oiling the cylinders this week/weekend hoping for some results. $400 each for the two ignition modules is almost as much as the car cost me to begin with so if it comes to those the car is for sale to break even with the new parts.
#37
#38
Gus,
I don't understand this - correct me if I'm wrong but surely the injector pulse (eventually) comes from the CPS telling the ECM where the crank is.
The OP was getting one 'noid flash per turn' (presumably per two turns) with the old CPS which means, to me, it was working properly so why has he suddenly started getting wet plugs?
I don't understand this - correct me if I'm wrong but surely the injector pulse (eventually) comes from the CPS telling the ECM where the crank is.
The OP was getting one 'noid flash per turn' (presumably per two turns) with the old CPS which means, to me, it was working properly so why has he suddenly started getting wet plugs?
#39
Gus,
I don't understand this - correct me if I'm wrong but surely the injector pulse (eventually) comes from the CPS telling the ECM where the crank is.
The OP was getting one 'noid flash per turn' (presumably per two turns) with the old CPS which means, to me, it was working properly so why has he suddenly started getting wet plugs?
I don't understand this - correct me if I'm wrong but surely the injector pulse (eventually) comes from the CPS telling the ECM where the crank is.
The OP was getting one 'noid flash per turn' (presumably per two turns) with the old CPS which means, to me, it was working properly so why has he suddenly started getting wet plugs?
I got one single flash from the injectors at key on and initial turn to start. None while cranking after that first. NOW I have injector pulse while cranking. NOW - not previously - I have injectors sending fuel when I crank. Previously I only had power to the injectors (ruling out a lack of power to the injectors as a no-start cause)
Last edited by Highlander64; 11-13-2012 at 09:38 AM.
#40