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Hi,
Need Help with an O2 sensor code (91 EJ22 in a 85 Vanagon) #32 and some rough running.
I have about 25K miles, 5 years, on my conversion, but it's smog time again here in California and, wouldn't 'cha know it, it decides to start throwing codes all over the place. Can't show up with a CEL a the smog test. It had been sitting mostly unused for the past year (light use). Anyway, here's the recent problems:
1)Code #15 (#2 Injector)- verified open loop on multimeter, should be 11.5 Ohms...replaced, code gone, thank you ECU.
2)Code #32 (O2 Sensor)- Replaced O2 sensor, code eventually showed back up. Scan tool shows Voltage not varying from .2 to .8 in a nice sine pattern. This was true for the old and new O2 sensor. It appears to peg near .1 volts for long time, but I've seem .8 too so it does change when revving sometimes. Rich, lean, ? either way don't' know what I can do about it.
3)Rough idle - Probably a symptom of problem #2. Tried new spark plug, spark plug wires, swapping coil, new Temp sensor (for ECU), different ECU, checked EGR Valve, sea-foaming the IAC....
The van has a loss of power when driving, but drives. When revving in the drive way, it sounds like it backfires a bit, kind of like a downshifting race car, only cool if you're a race car and not going for a smog test. Something is not right with the way the exhaust sounds when driving a full throttle. Sounds like a weaker whooshing noise that that growl I know and love. I've concentrated my efforts on the top end and sensors. I think the O2 is a red herring but don't know what else to do....mouse in the tailpipe..? I'm not sure if it really ran better after replacing the injector.
Does anyone have any ideas?
Thanks in advance.
Andy Malec
Ventura, CA
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Update:
unplugging injector #2 doesn't change the way it runs.....I'm guessing that a problem.
The "new" injector was from the pile of parts. are there different JDM injectors?
-Andy
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--- In subaruvanagon@..., "andymalec" <andymalec@...> wrote:
Hi,
Need Help with an O2 sensor code (91 EJ22 in a 85 Vanagon) #32 and some rough running.
I have about 25K miles, 5 years, on my conversion, but it's smog time again here in California and, wouldn't 'cha know it, it decides to start throwing codes all over the place. Can't show up with a CEL a the smog test. It had been sitting mostly unused for the past year (light use). Anyway, here's the recent problems:
1)Code #15 (#2 Injector)- verified open loop on multimeter, should be 11.5 Ohms...replaced, code gone, thank you ECU.
2)Code #32 (O2 Sensor)- Replaced O2 sensor, code eventually showed back up. Scan tool shows Voltage not varying from .2 to .8 in a nice sine pattern. This was true for the old and new O2 sensor. It appears to peg near .1 volts for long time, but I've seem .8 too so it does change when revving sometimes. Rich, lean, ? either way don't' know what I can do about it.
3)Rough idle - Probably a symptom of problem #2. Tried new spark plug, spark plug wires, swapping coil, new Temp sensor (for ECU), different ECU, checked EGR Valve, sea-foaming the IAC....
The van has a loss of power when driving, but drives. When revving in the drive way, it sounds like it backfires a bit, kind of like a downshifting race car, only cool if you're a race car and not going for a smog test. Something is not right with the way the exhaust sounds when driving a full throttle. Sounds like a weaker whooshing noise that that growl I know and love. I've concentrated my efforts on the top end and sensors. I think the O2 is a red herring but don't know what else to do....mouse in the tailpipe..? I'm not sure if it really ran better after replacing the injector.
Does anyone have any ideas?
Thanks in advance.
Andy Malec
Ventura, CA
|
Check catalytic converter. Probably stop up
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Thanks, do I check that with some sort of backpressure reading or take it out and look thru it? Never done it.
I'm not ruling that out, but I think It's the injectors, just waiting for a new one.
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--- In subaruvanagon@..., Reno <rbm236@...> wrote:
Check catalytic converter. Probably stop up
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remember that when the ECU can't control the idle adequately via the IAC, it can resort to shutting off one or two injectors to slow the engine. this results in a lower, but rough idle. it can also lead you to the conclusion that injectors are not working if you test them only at idle.
it's also not uncommon to see the O2 sensor pegged at the low or high voltages when the engine is warming up or undergoing transients (like hard deceleration, etc), if the engine is temporarily running rich or lean out of the bounds of the ECU's correction ability, or in open loop.
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Show quoted text
--- In subaruvanagon@..., "andymalec" <andymalec@...> wrote:
Hi,
Need Help with an O2 sensor code (91 EJ22 in a 85 Vanagon) #32 and some rough running.
I have about 25K miles, 5 years, on my conversion, but it's smog time again here in California and, wouldn't 'cha know it, it decides to start throwing codes all over the place. Can't show up with a CEL a the smog test. It had been sitting mostly unused for the past year (light use). Anyway, here's the recent problems:
1)Code #15 (#2 Injector)- verified open loop on multimeter, should be 11.5 Ohms...replaced, code gone, thank you ECU.
2)Code #32 (O2 Sensor)- Replaced O2 sensor, code eventually showed back up. Scan tool shows Voltage not varying from .2 to .8 in a nice sine pattern. This was true for the old and new O2 sensor. It appears to peg near .1 volts for long time, but I've seem .8 too so it does change when revving sometimes. Rich, lean, ? either way don't' know what I can do about it.
3)Rough idle - Probably a symptom of problem #2. Tried new spark plug, spark plug wires, swapping coil, new Temp sensor (for ECU), different ECU, checked EGR Valve, sea-foaming the IAC....
The van has a loss of power when driving, but drives. When revving in the drive way, it sounds like it backfires a bit, kind of like a downshifting race car, only cool if you're a race car and not going for a smog test. Something is not right with the way the exhaust sounds when driving a full throttle. Sounds like a weaker whooshing noise that that growl I know and love. I've concentrated my efforts on the top end and sensors. I think the O2 is a red herring but don't know what else to do....mouse in the tailpipe..? I'm not sure if it really ran better after replacing the injector.
Does anyone have any ideas?
Thanks in advance.
Andy Malec
Ventura, CA
|
...didn't konw that, thanks for the info.
I fixed my problem in the end.
Stuck injectors. I had a faulted injector intially (0 Ohms) which I discarded. The ones I replaced in there were from a 20 year old manifold sitting in my garage. I thought, "what's the chance they are all stuck" as I tried all 4 of the replacement ones. turns out...100% are stuck.
I Soaked them in seaform for 24 hours and connected 12Vdc in quick pulses.
All problems cured, including O2.
Thanks,
Andy Malec
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--- In subaruvanagon@..., "iiigoiii" <iiigoiii@...> wrote:
remember that when the ECU can't control the idle adequately via the IAC, it can resort to shutting off one or two injectors to slow the engine. this results in a lower, but rough idle. it can also lead you to the conclusion that injectors are not working if you test them only at idle.
it's also not uncommon to see the O2 sensor pegged at the low or high voltages when the engine is warming up or undergoing transients (like hard deceleration, etc), if the engine is temporarily running rich or lean out of the bounds of the ECU's correction ability, or in open loop.
--- In subaruvanagon@..., "andymalec" <andymalec@> wrote:
Hi,
Need Help with an O2 sensor code (91 EJ22 in a 85 Vanagon) #32 and some rough running.
I have about 25K miles, 5 years, on my conversion, but it's smog time again here in California and, wouldn't 'cha know it, it decides to start throwing codes all over the place. Can't show up with a CEL a the smog test. It had been sitting mostly unused for the past year (light use). Anyway, here's the recent problems:
1)Code #15 (#2 Injector)- verified open loop on multimeter, should be 11.5 Ohms...replaced, code gone, thank you ECU.
2)Code #32 (O2 Sensor)- Replaced O2 sensor, code eventually showed back up. Scan tool shows Voltage not varying from .2 to .8 in a nice sine pattern. This was true for the old and new O2 sensor. It appears to peg near .1 volts for long time, but I've seem .8 too so it does change when revving sometimes. Rich, lean, ? either way don't' know what I can do about it.
3)Rough idle - Probably a symptom of problem #2. Tried new spark plug, spark plug wires, swapping coil, new Temp sensor (for ECU), different ECU, checked EGR Valve, sea-foaming the IAC....
The van has a loss of power when driving, but drives. When revving in the drive way, it sounds like it backfires a bit, kind of like a downshifting race car, only cool if you're a race car and not going for a smog test. Something is not right with the way the exhaust sounds when driving a full throttle. Sounds like a weaker whooshing noise that that growl I know and love. I've concentrated my efforts on the top end and sensors. I think the O2 is a red herring but don't know what else to do....mouse in the tailpipe..? I'm not sure if it really ran better after replacing the injector.
Does anyone have any ideas?
Thanks in advance.
Andy Malec
Ventura, CA
|
That's good info to put in the memory banks especially since I did my first ever smog test on recent conversion and it was a learning experience for the technician and myself. I did pass after some in depth explanations of where everything was on the conversion and thorough reading of the Executive Order.
_temoc
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--- In subaruvanagon@..., "andymalec" <andymalec@...> wrote:
...didn't konw that, thanks for the info.
I fixed my problem in the end.
Stuck injectors. I had a faulted injector intially (0 Ohms) which I discarded. The ones I replaced in there were from a 20 year old manifold sitting in my garage. I thought, "what's the chance they are all stuck" as I tried all 4 of the replacement ones. turns out...100% are stuck.
I Soaked them in seaform for 24 hours and connected 12Vdc in quick pulses.
All problems cured, including O2.
Thanks,
Andy Malec
--- In subaruvanagon@..., "iiigoiii" <iiigoiii@> wrote:
remember that when the ECU can't control the idle adequately via the IAC, it can resort to shutting off one or two injectors to slow the engine. this results in a lower, but rough idle. it can also lead you to the conclusion that injectors are not working if you test them only at idle.
it's also not uncommon to see the O2 sensor pegged at the low or high voltages when the engine is warming up or undergoing transients (like hard deceleration, etc), if the engine is temporarily running rich or lean out of the bounds of the ECU's correction ability, or in open loop.
--- In subaruvanagon@..., "andymalec" <andymalec@> wrote:
Hi,
Need Help with an O2 sensor code (91 EJ22 in a 85 Vanagon) #32 and some rough running.
I have about 25K miles, 5 years, on my conversion, but it's smog time again here in California and, wouldn't 'cha know it, it decides to start throwing codes all over the place. Can't show up with a CEL a the smog test. It had been sitting mostly unused for the past year (light use). Anyway, here's the recent problems:
1)Code #15 (#2 Injector)- verified open loop on multimeter, should be 11.5 Ohms...replaced, code gone, thank you ECU.
2)Code #32 (O2 Sensor)- Replaced O2 sensor, code eventually showed back up. Scan tool shows Voltage not varying from .2 to .8 in a nice sine pattern. This was true for the old and new O2 sensor. It appears to peg near .1 volts for long time, but I've seem .8 too so it does change when revving sometimes. Rich, lean, ? either way don't' know what I can do about it.
3)Rough idle - Probably a symptom of problem #2. Tried new spark plug, spark plug wires, swapping coil, new Temp sensor (for ECU), different ECU, checked EGR Valve, sea-foaming the IAC....
The van has a loss of power when driving, but drives. When revving in the drive way, it sounds like it backfires a bit, kind of like a downshifting race car, only cool if you're a race car and not going for a smog test. Something is not right with the way the exhaust sounds when driving a full throttle. Sounds like a weaker whooshing noise that that growl I know and love. I've concentrated my efforts on the top end and sensors. I think the O2 is a red herring but don't know what else to do....mouse in the tailpipe..? I'm not sure if it really ran better after replacing the injector.
Does anyone have any ideas?
Thanks in advance.
Andy Malec
Ventura, CA
|
