Engine idle problems

[zenkii]

I've used the searched button, but haven't found any answers yet. Ok here i go, my s14 is having some really bad idle problem since 2 month ago...this was all the sudden too. I did pull the code and gave me a odd code which is a code 15 but this code isn't even in the manuel, but this website http://www.ka24development.com/ecu_codes.html i got this "15 - Mixture ratio is too lean despite feedback control; fuel injector clogged" i used like a few bottles of injector cleans and no improvement...haven't tried seafoam yet and have no brought the injectors to be clean for an extra +$120 servicing... so i would like to know if anyone has ever had this problem which makes the car shakes like crazy(also the shiftknob shakes rapidly) and why sometimes my engine light keeps blinking?!??! Help please and hope for some quick reply

Note: -new NGK iridium spark plugs-oil change + air filter _ fuel filter-New rotor and cap-new fan belts (all 3 of them)-new starter-new waterpump-new o2 sensor- use 91 gas...-clean MAF sensor

[boriquaS13]

Sounds like youve got a bad ignition wire or if your check engine light blinksit means that your damaging your catalyctic converter...

[wankelTII]

What did you use to clean the MAS?Did the fuel filter look bad inside (really dirty)?Is there only a problem at idle, no drivability issues?

[zenkii]

What did you use to clean the MAS?Did the fuel filter look bad inside (really dirty)?Is there only a problem at idle, no drivability issues?

My uncle's mechanic used carb cleaners to clean the MAF sensor, i did no check the fuel filter if inside was really dirty or not...so i assumed it was the first time of changing the fuel filter... the idle problem from time to time affect the drivability like it seems like misfiring but after 2,000 rpm somewhat drives ok i guess...

Sounds like youve got a bad ignition wire or if your check engine light blinksit means that your damaging your catalyctic converter...

Im not sure if the ignition wires are the problem because they look like ok condition and is there anyway to check if its really the wire problem? Ummm i do have an exhaust leak due to a broken/missing bolt... is this causing the damage to the cat converter??? (it's a apexi dual n1)

Is there any other possiblity the car is running sh*tty? the car really shakes like crazy and idle sometime times drops to where the point it seems like the car is going to die out soon.....

[wankelTII]

Cleaning the MAF with carb cleaner will pretty much make it trash. Carb cleaner is too harsh, and it leaves a mild oily film. Thats 2 for 2 on ways to make a MAF not work.Wires rarely "look" bad, check them with a multi meter, should be like 50-100ohms or something like that, and they should all be close to the same thing.

[zenkii]

uhhh... don't everyone use carb cleaner for the maf ? aside from the MAF i think its still working perfectly because i've check the maf sensor whether it was malfunctioning or not.... this idle problem happened even before cleaning the mad sensor, so right now i might try to change the wires but if not thats gonna be a waste of money.... is there any other possibilities? plus the timing has been fixed.... need more help....

[crankshaft]

my 240 has had that problem in the past its a dead miss on one of the cylinders my problem was a bad injector and i too had almost everything new. i also did a compression test and everything was fine.

[zenkii]

my 240 has had that problem in the past its a dead miss on one of the cylinders my problem was a bad injector and i too had almost everything new. i also did a compression test and everything was fine.

so my only hope is to change that individual injector that is causing the malfunction? so cleaning it at a injector service won't do any good?

[boriquaS13]

Zenkii you need to do a cylinder balance test to isolate the were the missis, then check spark output on that ignition wire if that checks good thencheck the injector. You need to check for continuity across the two terminalsof the suspect injector if it reads open or OL then your injector is in fact bad. If that checks good (compare it with the other ones) then do a compression test or in whatever order you want as long as the result is the same.

[zenkii]

Zenkii you need to do a cylinder balance test to isolate the were the missis, then check spark output on that ignition wire if that checks good thencheck the injector. You need to check for continuity across the two terminalsof the suspect injector if it reads open or OL then your injector is in fact bad. If that checks good (compare it with the other ones) then do a compression test or in whatever order you want as long as the result is the same.

Alright, last night my friend and i checked out wtf was up with the car. So warmed up the car a little bit and found out that one of the four cylinder wasn't firing. We checked by unplugging each of the wires individually and the #2 didn't even do anything when unplugged( no action, just constant).... so what can be causing this to happen? I also tried to take out all the injectors but 2 of the 4 where too tight to take off and i didnt want to strip bolts... what now....? i'm thinking this problem is also killing exxessive gas which i'm getting about 20mpg city+hwy

[180fan]

the injector could just be old and kicked the bucket. when pulling the injector screws, you might need to pull out the trusty old vice grips.

[boriquaS13]

check the resistance off injector #2 its probably open rplace the damn thingand get that car running straight

[zenkii]

OK people, my uncle had helped locate the problem that was causing the 2nd injectors to misfire/ malfunction. He used some mechanical vold detector thing to check if the injectors wires were ok, but the the yellow/black one had some shortage when he checked the same wire that was connected to the ECU. So what he did was add on an extension to that specific wire that was causing the shortage to the 2nd injector. Hope this solution will end the f'ed up problem where it makes the car shake like hell and give me back my 21/27 mi/gallon
Modified by zenkii at 6:18 PM 2/13/2007