Friends 240 sounds like a subaru and has not much power

[OM3GA]

My friend installed a header one day and started it up, it had a big exhaust leak so it sounded terrible and had no power at all we thought that was caused by the exhaust leak. He put the stock header back on and made sure all exhaust leaks were fixed. The car still ran terribly.. it was backfiring really loud using alot of gas and also backfiring through the intake.

Since then we have changed the Injectors, Injector seals, o2 sensor,Spark plugs, Spark plug wires,I inspected the cap and rotor both looked good, Ran injector cleaner,Adjusted timing without a light just by hand listening to the engine to see if it got better at all. Nothing has changed except it stopped backfiring completely.. yet there is still no power and now it sounds like a subaru with an exhaust.. i dont understand how could this happen? it was 100% fine before we unplugged the battery when we installed the new header. Strange right?

Anyways its a SOHC KA

[wynnEZ]

I vote bad coil.

[amolao]

Check injector connectors, make sure they are getting voltage. I went thru the same thing while also switchwing to a custom header.

[OM3GA]

allrighty will do, bad coil would almost make sense because i could unplug the 2nd spark plug wire and it ran the same.. but i could also unplug the injector for that same one and it ran the same, that was the only spark plug that was black and wet with fuel.. and the injectors are good so i know its not just sticking open.. but why would the rest of the plugs be fine?

[StandardProspect]

if the emmisions have been removed on the car check the egr and make sure its blocked off.

[fetherw8]

take the fuel rail out and have someone crank the engine over. if its injectors then you'll be able to see which one it is.

if its the coil make sure the contacts are clean or make sure that spark plug wire isnt bad.

or leave it alone cuz subarus sound a **** load cooler than a 240

[OM3GA]

emissions is not removed, it does sound rad arse but haha it dosnt have enough power to do anything with.. it sucks

[1unar3clipse]

sounds like spark or fuel.

Mine sounded exactly as you describe when my third injector took a poop, sure enough after replacing my dist, rotor, wires, and spark plugs it was a blasted injector that I neglected to check in the beginning.

Amolao is right about checking the voltages to the injectors, although the subaru sound and lack of power make me think a cylinder isn't firing.

[brizanden]

take the fuel rail out and have someone crank the engine over. if its injectors then you'll be able to see which one it is.

if its the coil make sure the contacts are clean or make sure that spark plug wire isnt bad.

or leave it alone cuz subarus sound a **** load cooler than a 240

i know with a borla exhaust subies are sooooo sexy. i wish borla made a nice exhasust for 240s.

[srpowered240sx]

sounds like one plug isnt getting spark. you say you changed all the plug wires and "checked cap and rotor", it sounds like a dizzy cap/plug wire/plug problem. i would go over those with a fine tooth comb.

[sleepwalker4758]

let me throw in my two cents,

I'm sure it is the sparkle plug cables, it's pluged in the wrong order on the distributor.

[urcaptnspeaking]

mine did the same thing. Just before it let go. If you check all other stuff and it checks out then expect to get another motor.

[ilovesideways]

ahhh....sucks my ultimate swap would be an EJ22 with EJ25 heads...

[NissanTech240]

i'd say pull the plug out connected to the wire and see if it archs to metal make sure you are getting spark..if its weak or not consistent its a timing issue..you say it is getting fuel

[mrgreeneyes]

injector/injector harness....... just had this happen to mine

[OM3GA]

It is getting fuel im afraid its getting too much i suppose it could be the FPR, but i can unplug the injector or spark plug from the second cylinder in the line #3 in firing order and it will run exactly the same.. i cant figure out why though i will be testing for both things too bad i have enough problems of my own right now haha.

[89twoforty]

Compression test?

Obviously it's something with the 2nd cylinder. Could be something as simple as a bad plug wire or an injector. It could also be pretty serious.

Good luck.

[nstabl]

you don't have spark to one of the cylinders.... i unplug a spark plug wire before pulling into parking lots sometimes and people are like IS THAT A WRX MOTOR YOU GOT IN THERE??!

[veebee]

i remember when my body harness near the fuel pump **** out on me and wouldn't run the fuel pump my car sounded like that... except it would start, idle/sound like a boxer 4, and then die

hard wired the fuel pump and bada bing, problem solved

[OM3GA]

It still runs like crap but it is running a little better however u can unplug the 2nd spark plug wire or injector connector and it runs exactly the same its getting spark and i dont know how to test it for fuel and the compression is fine too. I checked the ecu for codes here is what it said

12-Airflow meter circuit34-???51-???23-???45-Injector leak

Helps a little but wtf are those random codes??

[sebazztard]

sounds like a subaru...haha... been around them for 15 years and i couldnt help but laugh when i read the title. gotta love that piston slap.

[OM3GA]

lol except for there is no piston slap haha thanks for the post though

[ghx407]

Your problem could be a bad wire or spark plug on cyl.2. Try another plug wire and spark plug on there. If the problem disappears, replace the plug or wire, whichever one doesn't work.

If the problem persists, the issue could be a bad injector o-ring. Unbolt the fuel rail from the intake manifold and unplug the injectors, but don't remove any injectors, fuel lines, or anything else from the rail. Put the ignition switch in the "ON" position, lift the fuel rail a bit, and look under it to see if injector 2 is leaking fuel. If it is, remove the injector, replace its o-rings, lubricate them, and put the injector back in the rail. Then replace your oil because it could be contaminated with gas.

If the o-rings are not leaking, you could have a bad injector on cyl.2. Replace it with one from a working cylinder to see if cyl.2 fires. If it does, replace the bad injector.

If none of the above alternatives fix your problem, you probably have compression problems in cyl.2.

[OM3GA]

We just put in new spark plug wires, plugs, swapped injectors they are all fine, my friend changed the injector seals although did not change the o rings at the very top.. and i doubt he lubricated them when he put them in so they could have ripped i suppose. I tried to lift the rail with the key in the 'ON' position and the 4th injector shot out and spit gas everywhere haha high pressure i suppose.. i havent tested any part of the injector connectors to see if they are giving adequate power. I suppose that'll be the next step.

[nstabl]

We just put in new spark plug wires, plugs, swapped injectors they are all fine, my friend changed the injector seals although did not change the o rings at the very top.. and i doubt he lubricated them when he put them in so they could have ripped i suppose. I tried to lift the rail with the key in the 'ON' position and the 4th injector shot out and spit gas everywhere haha high pressure i suppose.. i havent tested any part of the injector connectors to see if they are giving adequate power. I suppose that'll be the next step.

damn, thought this problem would be solved by now

[confused9]

I know me too soo many codes thrown now haha gotta start with the basic stuff i guess, replace injector seals again and idk wtf is up with this thing its irritating though, its just all the sudden running horribley

[brizanden]

i missed most this thread but dizzy maybe?

[smoothlikewater]

It was the misplace of spark plug wires, and a little bit of timing, and lowering the idle, because it was not getting spark to the 2nd and 4th

[OM3GA]

lol i knew it would turn out to be a spark issue.. ive seen that problem a lot.. I just never got enough time to be over there and he wouldnt buy a new battery and was just over it we had to keep bump starting it every time and that was getting very very annoying. Glad to hear it runs well again! That thing is a beast for a sohc lol lemme know if you need any parts or wanna get my wheels or somethin man.take care!