02 randomly looses power
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Joined: Dec 2005
Posts: 10,247
Likes: 7,667
From: Chino Valley, Arizona
02 randomly looses power
codes were cleared about 200 miles ago these are current
p1211 p1670 p1209 p0603 p1282 p1212 p1247 p0470
last time I drove it it drove fine, After changing injector o rings. owner takes it back, gets about 50 miles away and it will barley climb a 5% grade that is about 1/4 mile long. this is 1/2 mile past 2 miles of 5% grade that it did fine on.
so far he has put a new motorcraft ICP sensor and fuel pump on it.
new alliant injector o rings, fresh fuel filter and oil change.
290,000 miles, unknown if injectors or hpop has ever been changed.
cold takes about 6 seconds of cranking to start
I only got a few days off this time and didn't get to do any troubleshooting. I go back out of town for 14 days Wednesday.
p1211 p1670 p1209 p0603 p1282 p1212 p1247 p0470
last time I drove it it drove fine, After changing injector o rings. owner takes it back, gets about 50 miles away and it will barley climb a 5% grade that is about 1/4 mile long. this is 1/2 mile past 2 miles of 5% grade that it did fine on.
so far he has put a new motorcraft ICP sensor and fuel pump on it.
new alliant injector o rings, fresh fuel filter and oil change.
290,000 miles, unknown if injectors or hpop has ever been changed.
cold takes about 6 seconds of cranking to start
I only got a few days off this time and didn't get to do any troubleshooting. I go back out of town for 14 days Wednesday.
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Joined: Dec 2005
Posts: 10,247
Likes: 7,667
From: Chino Valley, Arizona
got to drive it today,
after getting up to temp, at 1875 rpm ICP was 687 psi 64.84% duty cycle made it down shift. 2200 rpm 595 ICP psi 64.84% duty cycle and no able to accelerate much
both times when I would let up the accelerator icp would go up to over 3,000 lbs and duty cycle would drop to 4.69%
This makes me believe that the hpop is still good since pressure goes up when demand is removed.
changed the IPR since I have a spare and no change.
still 6 to 7 seconds to build enough pressure to fire the injectors when starting, long enough to set a P1211, P1282 and P1209
could the injectors be leaking enough internally to keep the hpop from building enough pressure?
after getting up to temp, at 1875 rpm ICP was 687 psi 64.84% duty cycle made it down shift. 2200 rpm 595 ICP psi 64.84% duty cycle and no able to accelerate much
both times when I would let up the accelerator icp would go up to over 3,000 lbs and duty cycle would drop to 4.69%
This makes me believe that the hpop is still good since pressure goes up when demand is removed.
changed the IPR since I have a spare and no change.
still 6 to 7 seconds to build enough pressure to fire the injectors when starting, long enough to set a P1211, P1282 and P1209
could the injectors be leaking enough internally to keep the hpop from building enough pressure?
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Hotshot
Joined: Dec 2005
Posts: 10,247
Likes: 7,667
From: Chino Valley, Arizona
I pulled the top plug when I changed the ipr and the resivor was full, of course I had just run the truck. but it started this morning cold with the same 6 to 7 seconds of cranking after sitting several days
Got Data?
Joined: Dec 2012
Posts: 4,245
Likes: 1,375
From: Lake Stevens, WA
Does it run better with the ICP unplugged? I understand there is a new one on there, but wanting to eliminate it and the wiring to it as a possible cause, in case the ICP sensor is a fake. Were both the ICP and IPR purchased from a reputable source?
Agree with you - it's hitting 3K psi ICP when let off - sounds like the HPOP is working and no HPO leaks. That IPR% of 4.69% is unusual - I have seen that with fake IPRs. It would be helpful to see a FORScan CSV file of a log when this occurs.
Agree with you - it's hitting 3K psi ICP when let off - sounds like the HPOP is working and no HPO leaks. That IPR% of 4.69% is unusual - I have seen that with fake IPRs. It would be helpful to see a FORScan CSV file of a log when this occurs.
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Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Might check that IPR is receiving the correct voltage, maybe even a voltage drop test. Seems like an unlikely cause but I do like to cover all bases. As for the injectors a Cody test or better yet if you've got a hydraulic hand pump you could put a more real world pressure to them. Also don't forget those high pressure oil rail drain plugs under the VC's front and rear. If one of those o rings blew you'd definitely have problems maintaining any pressure.
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Joined: Sep 2018
Posts: 544
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From: UT
1211 could be the HPOP, IPR, PCM, low fuel pressure, injector O-rings, or low reservoir oil (which is why I asked that question). I am sure I might have missed a few
1212 adds the IPR into the mix.....very similar symptoms to what you are describing as well
1670 is more electrical...have you checked the 40 pin connecter wiring for chaffing?
0470 is exhaust pressure....my buddy had same symptoms pulling a trailer.....CEL and that code. His backpressure tube was plugged up/sensor too....
1212 adds the IPR into the mix.....very similar symptoms to what you are describing as well
1670 is more electrical...have you checked the 40 pin connecter wiring for chaffing?
0470 is exhaust pressure....my buddy had same symptoms pulling a trailer.....CEL and that code. His backpressure tube was plugged up/sensor too....
Thread Starter
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Hotshot
Joined: Dec 2005
Posts: 10,247
Likes: 7,667
From: Chino Valley, Arizona
Does it run better with the ICP unplugged? I understand there is a new one on there, but wanting to eliminate it and the wiring to it as a possible cause, in case the ICP sensor is a fake. Were both the ICP and IPR purchased from a reputable source?
Agree with you - it's hitting 3K psi ICP when let off - sounds like the HPOP is working and no HPO leaks. That IPR% of 4.69% is unusual - I have seen that with fake IPRs. It would be helpful to see a FORScan CSV file of a log when this occurs.
Agree with you - it's hitting 3K psi ICP when let off - sounds like the HPOP is working and no HPO leaks. That IPR% of 4.69% is unusual - I have seen that with fake IPRs. It would be helpful to see a FORScan CSV file of a log when this occurs.
IPR was one of my spares from when I changed a HPOP and installed a new IPR
I stopped once while driving it and unplugged the IPC and it ran worse so i plugged it back in.
the 4.69% was costing
Thread Starter
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Hotshot
Joined: Dec 2005
Posts: 10,247
Likes: 7,667
From: Chino Valley, Arizona
Might check that IPR is receiving the correct voltage, maybe even a voltage drop test. Seems like an unlikely cause but I do like to cover all bases. As for the injectors a Cody test or better yet if you've got a hydraulic hand pump you could put a more real world pressure to them. Also don't forget those high pressure oil rail drain plugs under the VC's front and rear. If one of those o rings blew you'd definitely have problems maintaining any pressure.
haven't checked reference voltage.
Thread Starter
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Hotshot
Joined: Dec 2005
Posts: 10,247
Likes: 7,667
From: Chino Valley, Arizona
1211 could be the HPOP, IPR, PCM, low fuel pressure, injector O-rings, or low reservoir oil (which is why I asked that question). I am sure I might have missed a few
1212 adds the IPR into the mix.....very similar symptoms to what you are describing as well
1670 is more electrical...have you checked the 40 pin connecter wiring for chaffing?
0470 is exhaust pressure....my buddy had same symptoms pulling a trailer.....CEL and that code. His backpressure tube was plugged up/sensor too....
1212 adds the IPR into the mix.....very similar symptoms to what you are describing as well
1670 is more electrical...have you checked the 40 pin connecter wiring for chaffing?
0470 is exhaust pressure....my buddy had same symptoms pulling a trailer.....CEL and that code. His backpressure tube was plugged up/sensor too....
EBP and MAP monitored with autoengunity before starting and while driving, within 2 psi before starting and showed normal when running.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
All those random codes looks to me like a loose connection somewhere. What makes me believe that is the P1670 which is a communication issue between PCM and IDM. Engine braided ground cable still connected at the valve cover perhaps? Big connector under the air intake fully seated? Valve cover plugs fully seated? 50 cent mod all ok?
It's a Van Gogh
Joined: Feb 2010
Posts: 7,802
Likes: 1,333
From: Elk Grove, CA
at 1875 rpm ICP was 687 psi 64.84% duty cycle made it down shift. 2200 rpm 595 ICP psi 64.84% duty cycle and no able to accelerate much
both times when I would let up the accelerator icp would go up to over 3,000 lbs and duty cycle would drop to 4.69%
This makes me believe that the hpop is still good since pressure goes up when demand is removed.
changed the IPR since I have a spare and no change.
still 6 to 7 seconds to build enough pressure to fire the injectors when starting, long enough to set a P1211, P1282 and P1209
could the injectors be leaking enough internally to keep the hpop from building enough pressure?
both times when I would let up the accelerator icp would go up to over 3,000 lbs and duty cycle would drop to 4.69%
This makes me believe that the hpop is still good since pressure goes up when demand is removed.
changed the IPR since I have a spare and no change.
still 6 to 7 seconds to build enough pressure to fire the injectors when starting, long enough to set a P1211, P1282 and P1209
could the injectors be leaking enough internally to keep the hpop from building enough pressure?
Disconnect the ICP and see if anything changes, PCM will use a default value for fueling so it will kinda almost run normal.
How does the fuel filter look?
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Hotshot
Joined: Dec 2005
Posts: 10,247
Likes: 7,667
From: Chino Valley, Arizona
65% is max commanded output for the IPR, but the resulting ICP does not track. Since the IPR is fresh I'd think either the ICP is bad or the HPO is just blowing past the o rings.
Disconnect the ICP and see if anything changes, PCM will use a default value for fueling so it will kinda almost run normal.
How does the fuel filter look?
Disconnect the ICP and see if anything changes, PCM will use a default value for fueling so it will kinda almost run normal.
How does the fuel filter look?
fuel filter and fuel pump changed within the last 200 miles