2G Fuel injectors

[MasterMatt209]

I think one or more of my fuel injectors may be bad, how can I test this? I was told to pull one at a time to hear if the engine sounds any different. I don't have an ohm meter either

 

[Chumpaumpalumpa]

That will work wont give you details but you'll get the idea

 

[MasterMatt209]

That will work wont give you details but you'll get the idea

Okay thanks I'm trying to see what's causing all my problems

 

[Chumpaumpalumpa]

Okay thanks I'm trying to see what's causing all my problems

Well it's a DSM of course! What other problems?

 

[MasterMatt209]

Well it's a DSM of course! What other problems?

Haha right? Not sure what's causing it, shaking when in gear, loss of power compared to when I first bought it, heaitates when I accelarate after a stop.

 

[Chumpaumpalumpa]

Boost leaks

 

[MasterMatt209]

Boost leaks

Would the boost leak also cause bad air/fuel ratio?

 

[Chumpaumpalumpa]

http://www.dsmtuners.com/threads/dsm-maintenance-guide.476550/

 

[Chumpaumpalumpa]

Absolutely. The ECU thinks wrong amount of air is going in and compensates when it shouldnt and just throws everything into whack. They're awful.

 

[Chumpaumpalumpa]

But so will a million other things, gotta take em down 1 by 1 though

 

[MasterMatt209]

But so will a million other things, gotta take em down 1 by 1 though

Wow that thread is perfect I'll be following up on that checklist for sure! Also, there is a boost controller im not sure how to set it but it's at a low boost and I'm not sure if the ECU has been upgraded or anything might need a tune

 

[rough]

Like Chump said boost leak, you live here in Indiana, it's been hella cold lately, and the silicone/rubbers holding our pipes together get hard and tend to leak or pop off.

If you are having problems and it's low boost, when you turn it up, you will blow the pipe off or the problems will be more evident.

Any pictures of this boost controller?

 

[Chumpaumpalumpa]

Wow that thread is perfect I'll be following up on that checklist for sure! Also, there is a boost controller im not sure how to set it but it's at a low boost and I'm not sure if the ECU has been upgraded or anything might need a tune

Just look at it, clockwise should make the spring tighter and turn boost up (like a volume or most other types of knobs, which is logical), but there should be some kind of marking on it somewhere.

 

[MasterMatt209]

It's a Greddy profec spec II but I found my problem! I had one bad wire causing a misfire, so happy she's back to normal!

 

[rough]

Thanks for replying back with your results! Glad it was something simple!

 

[Chumpaumpalumpa]

Ya good to hear

 

[evil_eagletalon]

Pulling injector clips wont do you much but show you that cylinder misfires. That being said WHAT I do if I suspect a injector is failing is swap injectors around.

Lets say cylinder #1 is misfiring. Ill remove fuel rail, swap injector #1 with Injector # 234?
If cylinder # 1 no longer misfires, you have a bad injector. if the cylinder still misfires you have other issues.
Such as

bad coil,spark plug,spark plug wire, compression, bent valve, oil ontop of plug dude to tube seal failure.

 

[MasterMatt209]

No problem guys thanks for help

 

[tuurbo junkiiiee]

Definitely sounds like a boost leak

 

[MasterMatt209]

Turned out to be a misfire due to one of my wires, all fixed a while ago but that's the update

 

[707Dee]

Newbie question how do you find out what cc your injectors are? Friend just bought a DSM and isn't sure what he's running.