Silfrgluggr

Hey, just last week my max went from intermittent rough run to fulltime shakes and shudders. I got codes from the CEL and pulled up the Ign primary one... P1320 on a scanner. I did not however get an individual misfire code so i ruled out any coils and replaced the crank pos ref sensor and condensor...

Still shaking. Went to a buddys place and hooked up the scanner. Did a power balance test and found that nothing happened when i shut off injector #1. I haven't been able to do an ohm check on it yet but i did hear the click with a stethoscope which leads me to believe its just clogged as hell.

Now my question is, should i clean it? Is it worth to do the whole set, or should i just replace the bad one and run seafoam for the rest.

Tl;dr, bad injector, clean or replace

njmaxseltd

iTrader: (19)

Your getting an ignition error code yet your looking at the fuel injectors?
If coil pack #1 isn't firing, then common sense says disabling the injector will do nothing either.

Sort of like looking at the engine when you have a flat tire...

ShocknAwe

iTrader: (3)

1320 is usually always the coils or could be the harness as well

DennisMik

iTrader: (2)

Swap ignition coils on cylinder on and see what happens.

Silfrgluggr

Derp, right. I was being a moron and gettin ahead of myself, i guess that coil could just be firing weak then? i didn't get a code for a misfire though so i've just been throwing parts at it. Not very good at this diagnosing stuff. Ill try dennis' suggestion tonight and swap 1 & 3 coils and see what happens

CMax03

iTrader: (3)

I'll say this and you still have to make your decision!....I've done this before, and all were sent in to be cleaned and calibrated (flow matched) as close as possible to each other...within a year 2 of them failed (open solenoids)...I thought I did something special senting them to RC engineering and It was more cost effective replacing those 20 yr old + injector with new units and sleep like a baby everynight without a worry...Check out partsgeek.com for some inexpensive replacements....I used partgeek when working on my niece's Pathfinder (VG) but I went the OEM route on my 3rd Gen VG when it proved to be better just replacing the old units and starting from scatch with brand new units.....GL

Silfrgluggr

Okay, switched around 1 & 3 and found it was definitly the coil, replaced the whole bank this morning and all is well. Thanks for the kick back on track guys