Hi everyone,
I'm experiencing some annoying issues with my S15's SR20DET.
I went to Germany a couple of days ago, and I made a top-speed pull on the autobahn (with an HKS SLD fitted)
The car was running fine, but when I reached about 6300 rpm in 6th, I felt like a power drop, so I slowed down.
From this day, I have a quite loudly rattle noise and high RPM issues.
The noise can be heard from idle. Pretty sure it comes from the top end.
The noise is like this video : http://www.youtube.com/all_comments?v=uyORsBWMfrghttp://www.youtube.com/all_comments?v=uyORsBWMfrg
Noisy from idle to 2500 rpm, after, I can still hear it (at a higher frequency), but not as loud.
The other problem is high RPM hesitation. Despite the noise, the car runs good until 5000 rpm.
Then, there are some small hesitations like misfire, and a real lack of power.
Pressure is à 0.6 bar max, and instable, whereas it was at a stable 0.9 before the problem.
So, I removed the valve cover to check what's happening.
No obvious problem, everything seems OK, no wear, etc
Some rockers have a little bit of lateral play, but I haven't found large play between the rocker and the cams.
Anyway, I bled today the lifters. There were some air bubbles in almost all of them.
After a test drive, the noise seems a bit quieter, but it's still there.
And the high RPM issue/lack of power is still present too.
I tested the VVT solenoid. It seems to work.
With a consult software, I tried to enable and disable it, nothing changes.
And anyway, the VVT has an effect only in mid range...
I don't think it's the cause.
What are your thoughts ?
Maybe a broken lifter ?
Can a bad lifter cause high RPM issues ?
My SR20 is stock, except an Apexi air intake, and a turbo back 3" exhaust...
Thank you !
I'm experiencing some annoying issues with my S15's SR20DET.
I went to Germany a couple of days ago, and I made a top-speed pull on the autobahn (with an HKS SLD fitted)
The car was running fine, but when I reached about 6300 rpm in 6th, I felt like a power drop, so I slowed down.
From this day, I have a quite loudly rattle noise and high RPM issues.
The noise can be heard from idle. Pretty sure it comes from the top end.
The noise is like this video : http://www.youtube.com/all_comments?v=uyORsBWMfrghttp://www.youtube.com/all_comments?v=uyORsBWMfrg
Noisy from idle to 2500 rpm, after, I can still hear it (at a higher frequency), but not as loud.
The other problem is high RPM hesitation. Despite the noise, the car runs good until 5000 rpm.
Then, there are some small hesitations like misfire, and a real lack of power.
Pressure is à 0.6 bar max, and instable, whereas it was at a stable 0.9 before the problem.
So, I removed the valve cover to check what's happening.
No obvious problem, everything seems OK, no wear, etc
Some rockers have a little bit of lateral play, but I haven't found large play between the rocker and the cams.
Anyway, I bled today the lifters. There were some air bubbles in almost all of them.
After a test drive, the noise seems a bit quieter, but it's still there.
And the high RPM issue/lack of power is still present too.
I tested the VVT solenoid. It seems to work.
With a consult software, I tried to enable and disable it, nothing changes.
And anyway, the VVT has an effect only in mid range...
I don't think it's the cause.
What are your thoughts ?
Maybe a broken lifter ?
Can a bad lifter cause high RPM issues ?
My SR20 is stock, except an Apexi air intake, and a turbo back 3" exhaust...
Thank you !
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