alright, driving the car... it starts sputtering one day and running on three cyl. i maintain my motor like a baby. i notice my cat is shot, replace the cat the next day, car still runs crappy on the way home from work then vwahla! it runs awesome again. that last for another 30min then its back to 3cyl yuck. i diagnose that my 2nd from the closest cylinder is getting spark through the wires but not through the plug. i put some brand new iridium ngk's in and gapped them to .044. car runs like a champ... for about a few hour and has a hiccup or two but still fine. today as im driving home from work i think hmm.. ill change my fuel filter again, why not it's cheap and some insurance towards a healthy future(i did my last one a year ago). on the way to pick it up what do you know...... fucking 4cyl action again. its cleaner and resonated sounding lol, but still the same. it sounds like a boat, no ticking, no tappping nothing of that sort, the motor sounds very sound via the engine bay. its causing the car to vibrate and drop about 2-300rshared_pm.
i come home, pull my fuel pump relay to de-pressurize the lines to swap it. go to crank the car over anddddd now it wont start. makes the dingy door open chime, but clock shuts off when key turned fully. i put the relay back in and still nothing at all, even hook up a battery jumper and it states my batt is at full charge. im pissed off and i go to lock my doors and notice that my seatbelt computer is now whining from the plug closest to the driver, i unplug it in fear. so whats the verdict guys? i checked my injectors via the screwdriver clicking method and alll sound fine. my connections are fine too. oh and to note, before replacing my plugs i checked the old ones and took out the 2nd cyl one that was not firing and placed it back in the car and it ran fine for like 30 min?

im stumped this time

 

i change my oil every 1500-2000 miles with rotella t and puro gold filters, last one was 600miles ago. i constantly monitor all fluids and engine vitals daily before driving. the motor has ran pristine for the last 2 years after my swap.

 

allllright, nissan tech not so full of tech's...

 

You have a injector going dead most likely.. Just because you hear ticking, doesn't mean it is working. The rail resonates the sound of other injectors pretty bad. This is a HUGE problem since methanol has been introduced into gas... I have changed so many injectos since the methanol crap... it kills side feed injectors and makes symptoms like you describe.


martin

 

^ what he said

 

thank you martin, i was thinking that this whole time but keeping it for last because a new set of injectors will set me back more than the small things ive done. so after removing the relay why wont it start? and the buzzing to the seat belt box? did i blow something? hmmmmmmmmm , i need it to run period then i can swap me injectors.

 

SR or KA injectors?

 

so id assume that because cyl2? was the culprit not firing etc then it would be the one with the dead injector?

 

KA24DE Harness/ Dead #2 Injector? Wiring? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

found this and i hope swapping an inj. solves mine.

 

I gather you got the car running again after all the "will not start" bs. Gremlins like this are a pain in the ass. Since the items you think might be the problem can be swapped into different locations i'd try some trial and error. Perhaps swapping a plug wire #2's with #1 or whick ever one, to see if the problem travels with the wire...same with the injectors or the plugs. the fuel filter is cheap but I'm pretty sure that wwould affect everything. This is a cheap method. Basically if you can duplicate the problem in the new location you can isolate where the problem.

Cahnces are you've already done this, if thats the case...sorry to waste you time mang.