Yellow Streak
07-21-2003, 03:40 PM
I just wanted to share an experience and what the solution was in case anybody has a similar problem.
We ran a Tuner Time Trial 4th of July weekend and the car ran great during practice (we were fastest by over 4 seconds - poor Ferrari).
During the first timed session, the car started breaking up as soon as it transitioned into VTEC. We checked everything we could (plugs, MAP sensor, oil, fuel, etc.). Everything seemed fine. We took the car out on the road and it ran great - I hate intermittent problems.
We got one lap in the last session and it started doing it again.
I pulled the codes and it was a misfire on each cylinder. The car was really acting like it had bent valves. Compression and leakdown were fine, so we ruled that out. I grabbed cbender's stock injectors and we swapped them in. That fixed the problem. I have no idea why a faulty injector would cause misfires in all 4 cylinders, but it does. The Honda dealership confirmed this as they have seen it before.
So, if your car ever acts like this, don't let them pull the head off and send it out for valve work - have them try injectors first.
-YS
We ran a Tuner Time Trial 4th of July weekend and the car ran great during practice (we were fastest by over 4 seconds - poor Ferrari).
During the first timed session, the car started breaking up as soon as it transitioned into VTEC. We checked everything we could (plugs, MAP sensor, oil, fuel, etc.). Everything seemed fine. We took the car out on the road and it ran great - I hate intermittent problems.
We got one lap in the last session and it started doing it again.
I pulled the codes and it was a misfire on each cylinder. The car was really acting like it had bent valves. Compression and leakdown were fine, so we ruled that out. I grabbed cbender's stock injectors and we swapped them in. That fixed the problem. I have no idea why a faulty injector would cause misfires in all 4 cylinders, but it does. The Honda dealership confirmed this as they have seen it before.
So, if your car ever acts like this, don't let them pull the head off and send it out for valve work - have them try injectors first.
-YS