2008 Evo GSR idle issues
#1
Newbie
Thread Starter
2008 Evo GSR idle issues
I know this has been discussed a ton and I've searched. I am having idle issues that is becoming unbearable to me. It's almost embarrassing when stopped in public.
The car idles fine until it gets up to operating temperature and then begans to act up. The RPMs begin the bounce and the exhaust begins to pop. At some point it seems that it will stall out, however hasn't done that yet. I can temporarily fix this by messing with the A/C.
The car is protuned and was doing it before and after the tune. The spark plugs have been recently changed with OEM plugs. I've swapped the blue relays and the issue persists.
im at a loss
The car idles fine until it gets up to operating temperature and then begans to act up. The RPMs begin the bounce and the exhaust begins to pop. At some point it seems that it will stall out, however hasn't done that yet. I can temporarily fix this by messing with the A/C.
The car is protuned and was doing it before and after the tune. The spark plugs have been recently changed with OEM plugs. I've swapped the blue relays and the issue persists.
im at a loss
Last edited by X2jesse1x; Nov 21, 2017 at 09:40 PM.
#2
Evolved Member
iTrader: (1)
Could be a range of things, but I'd start looking at the below list.
1. Vacuum leak
2. Injector issue causing lean scenario (do you have a wideband?)
3. Throttle body issue (take your lower intercooler pipe off of the throttle body and see if anything looks wonky)
4. Dirty MAF sensor
5. Restriction in the exhaust. (Are you running a cat?)
6. Dirty fuel sock
7. Dirty/Clogged PCV valve
Take a look at those items and report back.
1. Vacuum leak
2. Injector issue causing lean scenario (do you have a wideband?)
3. Throttle body issue (take your lower intercooler pipe off of the throttle body and see if anything looks wonky)
4. Dirty MAF sensor
5. Restriction in the exhaust. (Are you running a cat?)
6. Dirty fuel sock
7. Dirty/Clogged PCV valve
Take a look at those items and report back.
Last edited by jakgal04; Nov 22, 2017 at 06:47 AM.
#3
Newbie
Thread Starter
Could be a range of things, but I'd start looking at the below list.
1. Vacuum leak
2. Injector issue causing lean scenario (do you have a wideband?)
3. Throttle body issue (take your lower intercooler pipe off of the throttle body and see if anything looks wonky)
4. Dirty MAF sensor
5. Restriction in the exhaust. (Are you running a cat?)
6. Dirty fuel sock
7. Dirty/Clogged PCV valve
Take a look at those items and report back.
1. Vacuum leak
2. Injector issue causing lean scenario (do you have a wideband?)
3. Throttle body issue (take your lower intercooler pipe off of the throttle body and see if anything looks wonky)
4. Dirty MAF sensor
5. Restriction in the exhaust. (Are you running a cat?)
6. Dirty fuel sock
7. Dirty/Clogged PCV valve
Take a look at those items and report back.
I don't have a wideband. The injectors in the car are FIC 900 I believe. I don't have any kind of CEL though.
The tuner wasnt able to find the issue when I had it tuned this past august.
i will check the other stuff you mentioned and report back. Thanks for the advice!
#5
Evolved Member
Sounds like a misfire to be.
Id start off by pulling the spark plugs for inspection. You can add pictures if your unsure on what to look for.
Another possibilty would be unmetered air i.e boost leak or vaccum leak.
Have it scanned for codes also. There may be some pending codes that will help point you in a better direction.
Id start off by pulling the spark plugs for inspection. You can add pictures if your unsure on what to look for.
Another possibilty would be unmetered air i.e boost leak or vaccum leak.
Have it scanned for codes also. There may be some pending codes that will help point you in a better direction.
#6
Newbie
Thread Starter
Sounds like a misfire to be.
Id start off by pulling the spark plugs for inspection. You can add pictures if your unsure on what to look for.
Another possibilty would be unmetered air i.e boost leak or vaccum leak.
Have it scanned for codes also. There may be some pending codes that will help point you in a better direction.
Id start off by pulling the spark plugs for inspection. You can add pictures if your unsure on what to look for.
Another possibilty would be unmetered air i.e boost leak or vaccum leak.
Have it scanned for codes also. There may be some pending codes that will help point you in a better direction.
how do I check for boost leak or vaccum leak?
#7
Evolved Member
Need to buy a boost leak tester or make one from home depot parts.
Pretty much you pressureize the turbo system through the turbo compressor and listen for air leaks or spray soapy water.
Also if plugs were replaced already id do a compression test. To me it sounds like a misfire in the videos
Pretty much you pressureize the turbo system through the turbo compressor and listen for air leaks or spray soapy water.
Also if plugs were replaced already id do a compression test. To me it sounds like a misfire in the videos
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#11
Newbie
Thread Starter
That's my guess too. I plan on getting a wideband once I fix this issue. I'm probably going to take it to a shop after the holidays.
#12
Newbie
Any update on this? I've noticed my car will be sitting fine at a stoplight then sort of stumble, but not bad enough to cause popping or anything too unusual.. just kinda as if i've turned on the AC and the car stumbles for a second. Seems weird.
#13
Newbie
Also, I see yours looks to be ziptied, but for the search functions sake if someone looks at this thread in hopes of resolving their own issue: https://www.evolutionm.net/forums/ev...s-do-asap.html
#14
Newbie
Thread Starter
unfortunatly no. I'll probably have to wait until after the holidays and take it to a shop.
#15
Have you recently messed with your break booster? I had the exact same issue after I changed out my cmc. The problem was the o ring inside the break booster was tangled which caused a vacuum leak for me.