Nate355RS
Proven Member
- 446
- 50
- Oct 25, 2012
-
Salem,
Virginia
Occasionally when I start my car, hot or cold, it will run rough then after a few minutes it'll run smooth and all my power is back, almost like someone flipped a switch. This is on my 92 VR4.
While it was running rough I disconnected the injectors one at a time to see if idle changes. They all changed the idle, except on cylindar 3. After a few minutes the motor stated running smooth and I disconnected injector 3 and now the idle changes. I'm pretty sure it's a problem related to cylindar 3, just not sure what the problem is or how to fix it. And I'm confused why it only happens after start up, and once it smooths out I don't have any problems.
Just to cover a few bases, the motor has good compression, no boost leaks, and I've swapped to known good injectors and the problem didn't go away. The problem also happens in open and closed loop.
While it was running rough I disconnected the injectors one at a time to see if idle changes. They all changed the idle, except on cylindar 3. After a few minutes the motor stated running smooth and I disconnected injector 3 and now the idle changes. I'm pretty sure it's a problem related to cylindar 3, just not sure what the problem is or how to fix it. And I'm confused why it only happens after start up, and once it smooths out I don't have any problems.
Just to cover a few bases, the motor has good compression, no boost leaks, and I've swapped to known good injectors and the problem didn't go away. The problem also happens in open and closed loop.