EDIT: please read the 2nd reply below for a more descriptive write-up and update

After cleaning my JWT properly, slight oiling afterwards, install, and it started to run a little weird, then at full throttle the air intake sounded way different, like it was bogging.

Now, the CEL is on, at idle it sounds like a high pitch fuel-pump-like sound, and the idle is off.

I'm going to do a relearn, and reset, and see where this goes, but my main concern is the fuel-pump-like sound coming from the engine bay, right in the front of the engine area.


PS, the air filter was VERY dirty too. Maybe I should have reset the ECU before installing the clean filter.

Darryl

 

EDIT/UPDATE Failed to mention the car went into Nissan today to start an oil consumption test. Was also in for a driveline vibration & engine tick[/b] Would they have hooked something up to a scanner?

I reset the ECU, throttle relearn and all procedures properly, CEL went OFF. Idle is fine, but this high pitch squealing is still persisting.

This squeal happens when the revs are above 3k rpm and dissapear when the idle drops below 750 rpm.

Does NOT sound like a belt or bearing. or could be? It wouldn't disappear if it were a belt.

 

How come just a "slight" oiling? It ought to be pretty well saturated. Did you knock the MAF cable loose accidentally?

 

Bearing failure due to oil problems or increased tolerances?

 

Well, I didn't want to over oil, which is a common nono.
Ya, don't know what to say or do except bring the damn car back to Nissan here and say wtf did you guys do.

I don't think cleaning an air filter can cause all of this.

 

close this thread plz

 

You sure it isn't a whistle sound you're hearing??? All popchargers have a distinct whistle to them around similar RPM's... Just an idea

 

Cleaning the air filter broke your fuel pump? Don't know where to go with this. Sorry.

 

Ya, thread is old and Nissan still can't figure it out.

Oh well. I get a new engine from Nissan anyways due to my OC.