jkjersey
02-10-2007, 06:37 PM
I am having issues with my GC8. I am still awaiting to hear back from Rallispec to see what they think could be wrong or to take a look at it.
The car has a JDM STI VI (EJ207) drivetrain swap in it along with the JDM STI ECU
When the temperature started to drop last month I noticed my car started to hesitate when I was going from a cruise to when I pressed on the throttle more to accelerate.
It sounds like a sputter. I then started using Lucas Octane Booster according to their directions. This masked or fixed the problem. I thought it was an octane issue with the winter blends of gas. Then yesterday it started acting up more and worse to the point that when I get in boost it sputters. I do not hear any pinging or metal on metal of which I assume detonation sounds like. On my Greddy E-01 I see the curve spike and dropout and not look smooth when it happens.
Now when the weather was warmer I took the car back to Rallispec right away after getting it back because I heard a fuel pump noise like an electric humming. I took it back to them and they said that it probably needs a new pump and they had a hard time sourcing a pump for my GC8 due to compatibility reasons. (Can someone let me know what pumps would work for my GC8). So they had to modify my existing one.
Do you think these symptoms could be a fuel pump issue or even a fuel filter one?
No variables changed I use the same gas from the same gas stations.. unless I got a bad batch?
When the car isn't under boost and I lightly and slowly accelerate it can get in revs fine and is smooth as butter.
Can fuel pumps fail partially? Or is it all or nothing? I did notice that when my car got to a 1/4 tank or below it ran much worse and the acceleration under boost got more jerky.
I am very troubled and would like this fixed asap because it is my daily driver any input would be appreciated.
The car never got tuned for 93 octane because Rallispec and others said it should be fine with running the stock JDM sti ecu because the ecu would just pull timing. I was kind of always perplexed why others werent insisting that it has to be tuned from the getgo with ECUTEK. I just hope major damage hasn't occured.
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http://img.photobucket.com/albums/v420/Teckademics/Teck%201%20pics/teck5dh.gif (http://www.teckademicseast.com/)
Impreza GC8 JDM STI VI conversion
05 MCS
Drop by my page @ http://www.myspace.com/jkjersey
The car has a JDM STI VI (EJ207) drivetrain swap in it along with the JDM STI ECU
When the temperature started to drop last month I noticed my car started to hesitate when I was going from a cruise to when I pressed on the throttle more to accelerate.
It sounds like a sputter. I then started using Lucas Octane Booster according to their directions. This masked or fixed the problem. I thought it was an octane issue with the winter blends of gas. Then yesterday it started acting up more and worse to the point that when I get in boost it sputters. I do not hear any pinging or metal on metal of which I assume detonation sounds like. On my Greddy E-01 I see the curve spike and dropout and not look smooth when it happens.
Now when the weather was warmer I took the car back to Rallispec right away after getting it back because I heard a fuel pump noise like an electric humming. I took it back to them and they said that it probably needs a new pump and they had a hard time sourcing a pump for my GC8 due to compatibility reasons. (Can someone let me know what pumps would work for my GC8). So they had to modify my existing one.
Do you think these symptoms could be a fuel pump issue or even a fuel filter one?
No variables changed I use the same gas from the same gas stations.. unless I got a bad batch?
When the car isn't under boost and I lightly and slowly accelerate it can get in revs fine and is smooth as butter.
Can fuel pumps fail partially? Or is it all or nothing? I did notice that when my car got to a 1/4 tank or below it ran much worse and the acceleration under boost got more jerky.
I am very troubled and would like this fixed asap because it is my daily driver any input would be appreciated.
The car never got tuned for 93 octane because Rallispec and others said it should be fine with running the stock JDM sti ecu because the ecu would just pull timing. I was kind of always perplexed why others werent insisting that it has to be tuned from the getgo with ECUTEK. I just hope major damage hasn't occured.
----------------------------------------------------------------
http://img.photobucket.com/albums/v420/Teckademics/Teck%201%20pics/teck5dh.gif (http://www.teckademicseast.com/)
Impreza GC8 JDM STI VI conversion
05 MCS
Drop by my page @ http://www.myspace.com/jkjersey