project_EM1
05-03-2011, 06:31 PM
Ok needs some help I have an em1 with a gsr swap that's slightly hesitating on part throttle.
Mods : short ram intake , walbaro 255lph pump, aem fuel pressure regulator
Now when I first got the swap in it was running rich due to the walbaro fuel pump, so I purchased an aem fuel pressure regulator to adjust the fuel pressure down to stock spec. I also replaced the primary o2 sensor, thinking that could also be the problem. Again some what fix the issue of me burning a lot of gas, but still have a slight hesitation issue after the car has warmed up and have been driven around awhile. Also replaced the spark plugs and still no fix. I am thinking it might be a timing issue or maybe a lost of compression in one of my cylinders. Could that be the cause of it too or no.
So can any one offer me any info or advice to what I can check next.
Btw the motor is running on a p2t obd2 ecu, could that be a cause of the issue
Any help is appreciated
Mods : short ram intake , walbaro 255lph pump, aem fuel pressure regulator
Now when I first got the swap in it was running rich due to the walbaro fuel pump, so I purchased an aem fuel pressure regulator to adjust the fuel pressure down to stock spec. I also replaced the primary o2 sensor, thinking that could also be the problem. Again some what fix the issue of me burning a lot of gas, but still have a slight hesitation issue after the car has warmed up and have been driven around awhile. Also replaced the spark plugs and still no fix. I am thinking it might be a timing issue or maybe a lost of compression in one of my cylinders. Could that be the cause of it too or no.
So can any one offer me any info or advice to what I can check next.
Btw the motor is running on a p2t obd2 ecu, could that be a cause of the issue
Any help is appreciated