Problem with engine work (low boost) and AYC error
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Joined: Aug 2011
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From: Riga
Problem with engine work (low boost) and AYC error
Car - evo4 with evo8 engine.
Have several problems. may be connected maybe not
1. Car on idle works or at least sounds unstable. electricity voltage jumps - I can see on dashboard lamps that is not stable - they become lighter and darker- flashing a bit. RPMs do not jump and are about 900rpm. if i pull gas pedal a bit till 1200rpm - lamps stop flashing. engine sounds stable then.
Could voltage jumps be caused by unstable engine work? Or opposite - a bit strange work of engine could be caused by not constant voltage?
2. AYC lamp is on. a while before sometimes engine engine lamp flashed sometimes, sometimes not. Check at official dealer showed error 41 TPS. TPS was changed - check engine stopped flash. i do not see it any more but AYC lamp still is on.
AYC lamp goes on only when i turn on the car is off and turns on after some 1min trip. What could that be?
3. Could that be that official mitsu service got only one error (that one with TPS) and didn't show another? ECU check is the only one diagnostics to get AYC errors, right? no other special AYC check diagnostics at official, right?
4. I've read that AYC could be on with incorrect break bulbs. if one of the bulbs is dead - possible to be the reason?
5. I've read that AYC code could be check myself by linking some pin in EBD and counting ayc flashing. any info how to do that?
6. when drive i can feel boost from some 2800rpm to some 3800rpm. on the 3800-4000 there is a feeling that car is n/a and there is no pressure.
could it be like engine is in some kind service mode due to ayc lamp is on?
could it be some kind of hole in airintake-ic-turbo system?
7. could be any of this problem be caused by full catalytic converter? i've ordered decat pipe already just to be sure. i have feeling mine has gone a lot of miles.
8. btw TPS could be installed incorrectly? any chance i did that incorrectly? after installation rpms - 900 as were before and check engine is not on any more.
Show car to some specialists could be great idea but mine evo4 is the only car in the town. And there are several 4's in my country.
official mitsubishi dealer checked the car and gave conclusion:
DTU ECU - 14 TPS
AYC DTC - 41 TPS OPEN
TPS was changed to new one.
Thank you a lot for your help!!
Have several problems. may be connected maybe not
1. Car on idle works or at least sounds unstable. electricity voltage jumps - I can see on dashboard lamps that is not stable - they become lighter and darker- flashing a bit. RPMs do not jump and are about 900rpm. if i pull gas pedal a bit till 1200rpm - lamps stop flashing. engine sounds stable then.
Could voltage jumps be caused by unstable engine work? Or opposite - a bit strange work of engine could be caused by not constant voltage?
2. AYC lamp is on. a while before sometimes engine engine lamp flashed sometimes, sometimes not. Check at official dealer showed error 41 TPS. TPS was changed - check engine stopped flash. i do not see it any more but AYC lamp still is on.
AYC lamp goes on only when i turn on the car is off and turns on after some 1min trip. What could that be?
3. Could that be that official mitsu service got only one error (that one with TPS) and didn't show another? ECU check is the only one diagnostics to get AYC errors, right? no other special AYC check diagnostics at official, right?
4. I've read that AYC could be on with incorrect break bulbs. if one of the bulbs is dead - possible to be the reason?
5. I've read that AYC code could be check myself by linking some pin in EBD and counting ayc flashing. any info how to do that?
6. when drive i can feel boost from some 2800rpm to some 3800rpm. on the 3800-4000 there is a feeling that car is n/a and there is no pressure.
could it be like engine is in some kind service mode due to ayc lamp is on?
could it be some kind of hole in airintake-ic-turbo system?
7. could be any of this problem be caused by full catalytic converter? i've ordered decat pipe already just to be sure. i have feeling mine has gone a lot of miles.
8. btw TPS could be installed incorrectly? any chance i did that incorrectly? after installation rpms - 900 as were before and check engine is not on any more.
Show car to some specialists could be great idea but mine evo4 is the only car in the town. And there are several 4's in my country.
official mitsubishi dealer checked the car and gave conclusion:
DTU ECU - 14 TPS
AYC DTC - 41 TPS OPEN
TPS was changed to new one.
Thank you a lot for your help!!
Last edited by robotech; Sep 30, 2011 at 05:33 PM.
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