Injector issue

[youngun21a]

WARNING long story an use the word enough a lot!!!!

Where do I start,guess i should start when it all started,october 31,around 9pm after trick or treating,anyways got in my car an started but nothing it would just crank,so i figured no fuel pulled the fuel line an sure enough not enough fuel going in,so filter clogged ran to the auto store picked up a new one replace it an car turned on but running weird so drove home an waited till morning an check,car turn on the firsts try but not good so i pulled each spark plug wire to see if the injectors where firing,an sure enough number 2 was not..so i left for vacation came back replace the bad injector an bam ran worst than before so check the spark wires an sure enough 3 and 4 where not firing only 1 an 2 where..so don't know what would cause the injectors 3 and 4 stop working if they where working fine when i left..sos i got the FSM an check and everything check out got 12v on all injector plugs,spark on all spark plugs...so I'm guessing two new injectors are to be replaced..dam 100 bucks each.anyone had problems like this.or could the injectors just be clogged pretty bad that they won't click open..

[SoCal-S13]

cant help you as far as what is the issue but i have a good fuel rail with all 4 working injectors i will let it go for only $100. Willing to ship as well.

[liquid_cool]

i had a simillar issue recently..i found my issue to be the bolt for the timing idler sprocket was bent due to age and my BC272 cams adding to much force, what this did was bend that bolt up and when it did that the worm gear no longer would turn the dizzy..this made a really odd random shut down issue and then a no start issue all together, i had to replace the bolt and helicoil the hole , this solved my issue..there are a few things you should check to see whats going on..#1. see if a friend has a spare ecu, you may have a bad injector block..if it reacts the same way..then go to #2..swapp to a known good dizzy, the dizzy controlls injectors and the spark..if you still have the same issue..then go to #3. remove the harness and check your grounds to the ecu from the dizzy too..this would be the last place i would look unless you have a frankenbuilt car with a butcherd harness..if thats the case..then start here...good luck..keep us posted.

[youngun21a]

well no luck,replaced with two know working injectors,only injectors 1 and 2 are firing,3 and 4 nothing..is there a fuse i need to check,it turns on,it just runs like crap.."UPDATE" so i got a weird idea an i switch the injector plug from 2 an put it on 3 an 3 to 2 and it worked injector 3 work with the injector 2 plug so i'm getting fuel an spark...just not getting nothing from the plugs..how far this plug wires go,i know it's something small now..but can't figure it out..if it's a fuse or a loose wire ,it's all thats keeping my car from running..

[liquid_cool]

did you switch ecu's yet?

[youngun21a]

No 240sx,close to me..you think it could be my edu? I mean car turns on,like in my previous post switching injector plugs makes the other injectors work..consult show now codes.besides my ecu u have any theories what it could be..i check all grounds..i have spark an fuel..don't see anything on the fsm,on fuses that control the injector plugs..

[youngun21a]

So I got an ecu about 6 months an ran better than before.i had solid idle no hesitation at all,it ran like a new car,anyways I drive to work for about 74 miles back an forth,an last night when I got it turned it on an it sounded funny an I let it Idle an see if it would settle down,but if didn't then I notice white smoke from the tail pipe,it didn't smell sweet it smell like gas I open up my hood an I also could smell it,read some other questions on here an was close to my problem,an O-ring on my injector could be at fault,have to really press in the gas to turn it on,an still smell gas a lot, no gas leaks anywhere don't think is my ecu again?

[daemonyk]

Also possible that the wiring harness is having problems. Maybe try this... Find the wiring diagram for the KA (FSM link in stickies) and locate the pinouts for the injectors on the ecu plug on the harness, and check for continuity between the injector plugs and the ecu plug. That will help rule out the wiring harness as a potential cause.

[youngun21a]

Update: I removed the main fuel line an put in water bottler at the end,turned the key in an fuel came out as expected,replace the line removed the fuel pump fuse,started the car,an in stared right up then it died,put the fuse back an prime it then started it again an turned on,on the first try,as soon as it started smoke started to come an it got warm it was steady,no oil in the radiator was is clean,smoke don't smell sweet,I put my hand up to the exhaust,all I smell was gas an exhaust fumes..idle was good,then it flushuates up an down 1000,1100,no engine shake or violently..that's where I'm now?

[youngun21a]

Did a power balance.
Power balance
1.on:861 off:831 rpm drop:230
2.on:826 off:620 rpm drop:206
3.on:816 off:611 rpm drop:208
4.on:810 off:611 rpm drop:199

[youngun21a]

Been searching, some say valve seals,some say head gasket,so maybe some have another opinion before I take it to a mechanic.

Blue smoke after a mile drive, no smoke on startup. No overheating,still smell gas but no leaks..