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harrellauto
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| Posted: Jun 22 2011 at 11:33am | IP Logged
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I have a 2004 frontier 3.3 sc with a p0301. It is a dead misfire. I have changed plugs, wires, cap, rotor, distributor, number 1 injector. I have run a compression test 170 or real close on all cylinders. Cylinder leak down test pased. verified injector pulse and spark to number 1 cylinder. Vacuum test great. Pulled intake to check for leaky gaskets. Visually checked timing belt for marks. I got spark, fuel and compression. This truck is driving me nuts. The wife really wants her truck back. Pleease help
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frontierguy
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| Posted: Jun 22 2011 at 8:46pm | IP Logged
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By any chance, did you verify injector spray with the rail
removed? My concern is with a possible voltage drop for the
#1 injector, that is why I asked if you verified operation
with the rail removed. Any sign of water intrusion at the
ECU?
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'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.
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2011 John Deere X720SE
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harrellauto
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| Posted: Jun 23 2011 at 7:49am | IP Logged
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I did not. I did plug in the old injector while the veh was running and i could feel it pulse. Water intrusion in ecm; I will check that right now.
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harrellauto
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| Posted: Jun 23 2011 at 8:01am | IP Logged
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ECM is nice clean dry and secure. Started up this morning ran great till it heated up then dead mis on cyl 1
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frontierguy
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| Posted: Jun 23 2011 at 8:18pm | IP Logged
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Plug in the old injector while it is skipping and see if it
pulses.
__________________
'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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Peninsula2010
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| Posted: Jun 24 2011 at 1:18am | IP Logged
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I have seen something like this before and it turned out to be a faulty HVL that only showed up when running and caused a misfire on that cylinder.
Compression check was good when turning over.
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harrellauto
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| Posted: Jun 24 2011 at 7:09am | IP Logged
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HVL ILL bite whats an HVL?
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harrellauto
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| Posted: Jun 24 2011 at 9:01am | IP Logged
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hydraulic valve lifter?
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harrellauto
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| Posted: Jun 24 2011 at 6:49pm | IP Logged
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Did a running compression test while misfire was ocuring. 60 percent of my static at idle and 80 percent when i snap the throttle. On a GM thats great. tells me the engine is breathing ok in and out. IE lifters and valves ok
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frontierguy
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| Posted: Jun 27 2011 at 8:57pm | IP Logged
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harrellauto wrote:
Did a running compression test while
misfire was ocuring. 60 percent of my static at idle and
80 percent when i snap the throttle. On a GM thats great.
tells me the engine is breathing ok in and out. IE lifters
and valves ok |
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I'm confused on the static and throttle snap, what are you
using to check comp?
__________________
'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: 2004 3.3 sc misfire
