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Timmy2Cups
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Joined: Sep 13 2010
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U.S. - Oregon
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| Posted: Sep 13 2010 at 7:55pm | IP Logged
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Hello, I'm new here and am having some SERIOUS issues
with my 2002 Frontier w/ Super Charger.
About a year or so ago, it started to act kind of gutless
(especially on hills)...
Since then I have replaced a cracked exhaust manifold
(twice), repaired a vacuum leak, replaced a shot fuel
injector, replaced the timing belt, and replaced the
passenger side catalitic converter.... I THINK that's
everything.
I also began using premium gas after the whole thing
started hoping it would help.
Today, we're back to worse than square one. Start the
truck, it lugs and glugs and makes a knocking sound then
it dies.
THe only code it's registering is the "knock" sensor.
Could the knock sensor really be causing this??!!??
Any help is greatly appreciated thanks so much.
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frontierguy
Senior Member
Master Mechanic
Joined: May 20 2008
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U.S. - Pennsylvania
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| Posted: Sep 14 2010 at 8:36pm | IP Logged
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Classification:
ECO4-011
Reference:
NTB04-083
Date:
July 14, 2004
2001-2004 FRONTIER AND XTERRA;
SUPERCHARGER NOISE AT IDLE AND LACK OF POWER
APPLIED VEHICLES:
2001 - 2004 Frontier (D22) equipped with supercharger.
2002 - 2004 Xterra (WD22) equipped with supercharger.
IF YOU CONFIRM:
^ The supercharger makes a rattle/grinding type noise at Idle, and
^ The engine has reduced power while driving.
ACTION:
a. Review the supercharger information in this bulletin.
b. If your incident is not caused by "spark knock" as described in this bulletin:
^ Go to ASIST for further diagnostic information
NOTE :DO NOT REPLACE THE SUPERCHARGER FOR A SPARK KNOCK INCIDENT.
SUPERCHARGER INFORMATION
Premium fuel is required
^ The Supercharged (VG33) V-6 engine used in the 2001-2004 D22 Frontier and the 2002-2004 WD22 Xterra requires Premium Fuel.
^ If premium fuel is not used, the engine may experience "spark knock" during acceleration or under heavy loads.
^ If spark knock is detected by the "knock sensor", the ECM will put the supercharger into bypass (fail-safe) mode.
^ The supercharger will make a rattle/grinding type noise at idle when it is in "fail safe".
^ Also, the engine will have reduced power if driven in "fail safe".
Supercharger Bypass Valve
^ The bypass valve limits boost pressure from the supercharger when the system is in fail-safe.
^ In fail-safe, the internal bypass valve will remain mostly closed (see Figure 1).
^ After the key is turned OFF the ECM will reset and restore the boost solenoid function.
The bypass valve will function normally, and the rattle/grinding type noise will be eliminated
NOTE: if the knock sensor has failed, it may cause the same concern as if the engine was spark knocking.
__________________
'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.
Nissan Technician 25 + years
2011 John Deere X720SE
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Nissan Frontier Forums : Problems / Technical
Topic: Help!
