Injector troubleshooting newbie

[Nashville91s13]

So my 91' 240sx KA24DE was missing the other day. All wires were firing. My # 4 injector wasn't. I took the ohms on all four today and got the following: #1 (38.7), #2 (10.9), #3 (10.7), #4 was an erratic reading ranging from 8.10-9.00 and everywhere in between. I'm confused because #1 was firing when it was missing but the ohms are way too high. My only plan is to replace #4 and go from there since it was the one that wasn't firing........

[r3v_v3ng3]

might as well replace it. looks like its getting more resistance

[Justin35ll]

Find out why #4 isn't firing, replacing won't solve your problem if there is nothing wrong with the injector

[24j0hn]

replace your 1 and 4 injectors with good ones... high of low readings are no good... one is leaking and one is clogged...

my friends was 26ohms on number 2 and 9ohms on number 4... the idle was shaky and looked like it was missing, so we put two new ones in 2 and 4 and she ran like a beauty...

[Nashville91s13]

Ok I went to my local Pull-A-Part where injectors are $6. I took a multimeter with me and and found an Altima and a 240...KA24DE's. I pulled 5 injectors....2 of which read 11 ohms....3 read 10.8. I replaced my #1 and #4 with the two that read 11 ohms. Started it, let it idle, and took it for a 5 mile drive...got on it a few times. Runs good. Didn't miss. Fingers crossed...

[24j0hn]

yeah, we did the same thing with my friends type x yesterday... i have like nine ka injectors, all of which are good... so we hooked him up with the good ones and s*** pulled like no other

[r3v_v3ng3]

Ok I went to my local Pull-A-Part where injectors are $6. I took a multimeter with me and and found an Altima and a 240...KA24DE's. I pulled 5 injectors....2 of which read 11 ohms....3 read 10.8. I replaced my #1 and #4 with the two that read 11 ohms. Started it, let it idle, and took it for a 5 mile drive...got on it a few times. Runs good. Didn't miss. Fingers crossed...

nice

[Nashville91s13]

My idle is a tad lower than usual now 650-700...something like that. At one point yesterday it was dead at 500. Advance the distributor to compensate or some other problem? Also, somebody told me not to use injector/fuel system cleaner because of the tank. I have used Lucas fuel system cleaner in my last 2 cars (not 240's) when I did oil changes. Is this true or am I good to use it?

[numbnuts240]

you'll be fine.

[Nashville91s13]

you'll be fine.

I'll be fine with the Lucas or the low idle?

[numbnuts240]

the lucas.

[Nashville91s13]

the lucas.

Alright sweet. I wanted to run some through just to make sure they're flowing right.

[bonestock240sx]

were you able to get your car fixed? my number two cylinder is running lean cus the spark plug is white and the injector reads about 7 ohms. and 1,3,4 read right about 1.5 ohms. so you think that just replacing the 7 ohm injector will fix the shakes.

[Nashville91s13]

were you able to get your car fixed? my number two cylinder is running lean cus the spark plug is white and the injector reads about 7 ohms. and 1,3,4 read right about 1.5 ohms. so you think that just replacing the 7 ohm injector will fix the shakes.

KA injectors are supposed to read right around 11 ohms to my understanding. If your injectors are reading 7 and 1.5 then I would just replace all the injectors. Mine are firing just fine now and read 11, 10.9, 10.7, and 11. It feels a bit underpowered and the valves tick pretty bad. I looked in my new Chilton (aka..Bible) and it says that the rocker clearance should be checked every 15k miles and if they are too far out of spec they will tick and won't open all the way due to the cam wasting some lift just to touch the valve. My valve cover is a tad drippy so I'm going speck out the head in the next few days and put a new gasket on.

[heartofaskyline]

lol. i have the real bible if you need to borrow it oem service manuel ftw!

[bonestock240sx]

lol. i have the real bible if you need to borrow it oem service manuel ftw!

hahaha yeah i was about to say... chiltons is weak... and i yeah i read the Ohm meter wrong cus it was cold i couldnt see the decimal... all the injectors are 11 across. and the 2nd cylinder injector is... drum rollll....

.895 ohms... so its dead for sure. im gonna get one from napa for now. just cus im out of a job and gotta just get the job done as best as possible without spending to much money... i can get stuff at cost so hopefully it will only be like 40 bucks

[Nashville91s13]

sweet...swap that hoe out. Brooks.....nice bible lol