Not a Z or a 240, but HELP! Nissan XTerra.

[95zilvia]

Help me diagnose a problem
I can't figure this bitch out.

Engine misfire. 2000 Exterra 3.3L


Not getting a good signal to injector #3.
Checked specs of injector. Pass.
Checked output of injector wire w/ noids. Fail.
- real intermittent. maybe only a pulse per 2 seconds or so.
- rev up = better signal
Checked resistance of wiring. Pass.
Backprobed ECU and connected to noids. Fail.

So the ECU is sending out a **** signal to injectoe #3.
What gives?
I also took a look at the ignition control module in the distributor.
Maybe a little arcing going on in there.

But the question is, could a faulty ignition control module cause it to misfire only in one cylinder.
I totally don't remember what I learned.
Thanks guys :P

I love you.

[gijoe69]

hmmm check the FSM? how many miles on the xterra? do you use cheap gas ? maybe try changing Fuel Filter see if it gets better fuel flow? or regulator problems? fuel pump problem?

[95zilvia]

Its the actual electrical signal to the inkector that's at fault. Not the mechanics of the injector.
I really need your help on this one fellas. Cars been at my shop for a while already.

[blu808]

Hi John... :-)

SOunds like a bad ground signal on the injector harness.
could be efi harness or engine ground.

Hit me up so we can skeet all over.

[95zilvia]

skeet skeet skeet.
really u think its just a bad ground.
its only injector #3 thats havin the problem tho..

[blu808]

well shit man. Sounds pretty wack then.

Did you ohm test the output from each injector and see the variance on number 3?