E_Jay_Twenty
09-01-2012, 08:57 AM
Hey guys , so here's my problem.
The other day I was driving and noticed the car started to get a slight "jerk" on/off throttle. Nothing horrible, just enough to let me know something's wrong. So yesterday I started to feel a hesitation almost. It started out with doing a WOT pull from 2nd gear, starting at 2500 rpms. The turbo spools up to 15.3lbs (my target) just before 4,000rpms where it normally does. But the car felt like something was holding it back, nothing jerky just a loss of power. As soon as I hit 5,000 rpms the car opened up like it normally would. The boost stayed the same the whole time. It's just like something opened up at 5,000. Some pulls I took were fine later on in the day. Then later last night I had a pull where it hesitated all the way down by 3,000 and kinda broke up on itself, no misfiring like something else. So right after that I pop my hood, I turn the car into accessory mode with the fuel pump running. I go under the hood and hear a "hissing" noise right by the FPR. It almost souńs like a vaccum leak. Once again the car is not running and the fuel pump is on, almost a vaccum leak noise coming from the fpr/ front of fuel rail. I'm not sure what to do. I don't recall ever hearing that hissing before. How should I go about cleaning the fuel system? Is this even an issue or normal? Any input would help. I already plan on going to pick up new injector orings to yank everything.
Sr20det s13
Walbrol 255
560cc injectors
Z32maf
28r
All supporting intake exhaust etc mods
Fuel pressure gauge reads around 60 when pump is on, around 40
At idle.
I've had the car for a year. Blew my first sr20 a few month ago, this is my second motor, I do all my own mechanical work. No codes pulled from the ECU reads 55. Spark plugs had some black carbon on them. Cleaned with a a wire brush. I've experienced a knock sensor issue on my last motor. That was a backfire breakup higher rpm thing, this feels diffirent. Any help would be appreciated!
The other day I was driving and noticed the car started to get a slight "jerk" on/off throttle. Nothing horrible, just enough to let me know something's wrong. So yesterday I started to feel a hesitation almost. It started out with doing a WOT pull from 2nd gear, starting at 2500 rpms. The turbo spools up to 15.3lbs (my target) just before 4,000rpms where it normally does. But the car felt like something was holding it back, nothing jerky just a loss of power. As soon as I hit 5,000 rpms the car opened up like it normally would. The boost stayed the same the whole time. It's just like something opened up at 5,000. Some pulls I took were fine later on in the day. Then later last night I had a pull where it hesitated all the way down by 3,000 and kinda broke up on itself, no misfiring like something else. So right after that I pop my hood, I turn the car into accessory mode with the fuel pump running. I go under the hood and hear a "hissing" noise right by the FPR. It almost souńs like a vaccum leak. Once again the car is not running and the fuel pump is on, almost a vaccum leak noise coming from the fpr/ front of fuel rail. I'm not sure what to do. I don't recall ever hearing that hissing before. How should I go about cleaning the fuel system? Is this even an issue or normal? Any input would help. I already plan on going to pick up new injector orings to yank everything.
Sr20det s13
Walbrol 255
560cc injectors
Z32maf
28r
All supporting intake exhaust etc mods
Fuel pressure gauge reads around 60 when pump is on, around 40
At idle.
I've had the car for a year. Blew my first sr20 a few month ago, this is my second motor, I do all my own mechanical work. No codes pulled from the ECU reads 55. Spark plugs had some black carbon on them. Cleaned with a a wire brush. I've experienced a knock sensor issue on my last motor. That was a backfire breakup higher rpm thing, this feels diffirent. Any help would be appreciated!