Evo 9 gsr randomly turns off
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Evo 9 gsr randomly turns off
So i just got myself a evo 9 gsr and the problem is it randomly turns off like it would if i just turned off the ignition. I can start it up cold and it will run for about 10 seconds and just shut off and if im lucky it will start again after 15-30 seconds only to shut off again after another 10 seconds. Sometimes it can stay on for a while but if i drive for about 10 - 20 minutes (and it runs great) it just shuts off and it will only crank and eventually flood the sparkplugs. So to start it again after its flooded i have to either burn the plugs clean from gasoline or let it sit overnight. It has a bouncy reading from the o2 sensor so i think it is bad? I ordered a new one but this cant be the problem with it shutting off? (at idle it runs at a shaky 1500rpm with tiny pops and it suddenly will go a little up in rpm before it goes down to about 1500 again) Its got new injectors, fuel pump, coils, crank sensor (oem), decat and larger downpipe.
Its checked for vacum/boost leaks.
I have ordered new spark plugs, new cam sensors and new o2 sensor.
The car has oem ecu, oem turbo and untouched engine as far at i know. The ecu might have been flashed at some point. Do I have to "tune" in the decat if this hasnt been done?
Its checked for vacum/boost leaks.
I have ordered new spark plugs, new cam sensors and new o2 sensor.
The car has oem ecu, oem turbo and untouched engine as far at i know. The ecu might have been flashed at some point. Do I have to "tune" in the decat if this hasnt been done?
#3
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Its really hard to say, there isn't a ton of info on "how" it turns off.
Does the idle bounce or does it just die?
What is your wideband; if you have one, doing when this is happening?
What else have you troubleshot other than the vacuum and boost leak test?
Does it always crank?
To me, this sounds like a possible sensor issue; maybe cam or crank sensor? Its super hard to say for sure though. My suggestion would be trying to get a log of it shutting off and/or not starting. The thing that is throwing me is the flooding part? If it was a crank sensor, it wouldn't flood?
Does the idle bounce or does it just die?
What is your wideband; if you have one, doing when this is happening?
What else have you troubleshot other than the vacuum and boost leak test?
Does it always crank?
To me, this sounds like a possible sensor issue; maybe cam or crank sensor? Its super hard to say for sure though. My suggestion would be trying to get a log of it shutting off and/or not starting. The thing that is throwing me is the flooding part? If it was a crank sensor, it wouldn't flood?
#4
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Its really hard to say, there isn't a ton of info on "how" it turns off.
Does the idle bounce or does it just die?
What is your wideband; if you have one, doing when this is happening?
What else have you troubleshot other than the vacuum and boost leak test?
Does it always crank?
To me, this sounds like a possible sensor issue; maybe cam or crank sensor? Its super hard to say for sure though. My suggestion would be trying to get a log of it shutting off and/or not starting. The thing that is throwing me is the flooding part? If it was a crank sensor, it wouldn't flood?
Does the idle bounce or does it just die?
What is your wideband; if you have one, doing when this is happening?
What else have you troubleshot other than the vacuum and boost leak test?
Does it always crank?
To me, this sounds like a possible sensor issue; maybe cam or crank sensor? Its super hard to say for sure though. My suggestion would be trying to get a log of it shutting off and/or not starting. The thing that is throwing me is the flooding part? If it was a crank sensor, it wouldn't flood?
I just changed the o2 sensor right after the turbo and it runs cleaner on idle but still just shuts off like before.
I have changed crank sensor, both cam sensors and o2 sensor without any luck.
Yes it always cranks.
#5
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Ok, so I think the next step is to log the sensors as the cranking but not starting is happening. To me, this still sounds like a sensor issue.
It could in theory be the coils overheating, do you have a buddy you could swap coils with to test?
It could in theory be the coils overheating, do you have a buddy you could swap coils with to test?
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No, but I still have the original coils. The coils on the car are upgraded by previous owner and checked for spark and work.
#7
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Yea, testing the coils is one step, but if they are overheating and failing it might be hard to pickup on a tester.
I'd try to get a log of it not starting while logging the cam, crank and MAP sensors. To me, I really think thats whats happening but its super hard to say.
I'd try to get a log of it not starting while logging the cam, crank and MAP sensors. To me, I really think thats whats happening but its super hard to say.
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#9
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Ooo thats a good questionnn. I just assumed ACC stayed on and the engine turned off but that would be a whole different ball of worms if the ACC turn off.
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#11
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So just the engine points back to my last post. You'll have to do some logging and troubleshooting to get some more data before a cause can be determined.
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ViciousLSD (Aug 13, 2024)
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Ok, ill get someone with a good obd reader to help. Then get back with what we found.
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