WRX engine under my 240sx hood

[TOMKAIRA93]

yeah, that's how my car sounds. I've posted before things that I've gone through with my car and after all has been corrected (fuel pump hose, plugs, boost leaks, etc...) now my car sounds like a WRX.
Its not the coil packs, or MAF. The car does not feel too underpowered, but its definetely not running right and it idles fine.

If you've gone through this, please post your experience and corrected action. I would appreciate any help/ suggestions.

OH...car specs: Stock SR red top with FMIC

[Slidin240Wayz]

Dead coil pack.

I have extra if you want to buy a set or just one.

Edit...woops.

My bad...check the FSM.

How did you check the coil packs?

Burnt ECU?

Carlos

[johngriff]

exhaust gasket(s) blown out, check for leaks around the turbo.

[Dutchmalmiss]

Timing, plugs, coilpacks, injectors, or gasket leak.

[!Zar!]

One of your coilpacks or injectors.

Make your car sound like a suby but you don't loose too much power.

[MomentumGT]

I've dealt with a similar problem on my sr a couple of times. 1)there was water/moisture in the spark plug wells 2)spark plug electrod melted off 3)bad coil pack.

-Jon

[iRONDONkey]

man thats awesome hahha. that exhaust sound is so beastly. be sure to post up a vid!

[mehsilvia]

I had a similar problem. Resulted in a bad connection between the coilpack and harness, where the two connect with the large plugs. Some of the wires on the engine harness side were not secure so the connection was bad (similar to bad coil like mentioned above).

[JandMmotorsports]

check your compression in each cylinder. check yo head gasket

[SHIFT_*grind*]

Mine did that, it was a coilpack problem.

[TOMKAIRA93]

Thanks for the replies guys...out of all the solutions am inclining towards the blown gasket theory. I beleive there's a slight gasket leak around the turbo so that could very well be the culprit. We checked the coil packs by taking off one by one. All seemed to affect the idle when taken off. I removed all spark plugs as well a few times and didn't see any moisture or weird things. ECU is good cuz my brother in law hooked it up to his SR and it worked fine. And I just hope is not the head gasket at all. this car hasn't even driven more than 50 miles combine since installing the engine. The motor is good cuz I pulled it myself from the car in japan, so I know the engine was in good running condition before removal. I think my next step is to replace the turbo manifold gasket. It's a cheapie one anyways. Will be getting metal type. Thanks again guys. +1 for all the inputs. :)

[johngriff]

gasket material doesnt matter as much as making sure the downpipe is mounted to the trans, that not being hooked up kills those gaskets.

--= :-D

[S-Nation S13]

if you swapped or installed new injectors...did you make sure you used new O-Rings?...and if yo did did you lube the rings enough to where when you installed then it didnt feel like it was rubbing?

trust me cause i did that and my cylinder 1 was flooded and on top of that it got worse to the point to where my car shut down.....
hope this help

[KOUKI KAN KAN]

Check out your sparkplugs thats what it was for me .

[S-Nation S13]

ok if you want i can tell you how to step by step to determine where you are at fault pm me if interested

[Sir]

damn you for making me think this was a build thread :(

[TOMKAIRA93]

damn you for making me think this was a build thread :(

It does not mean you have the right to give me negative rep. :wtf:

[S-Nation S13]

tomkaira93 you fig out what the prob. was hit me up if you have anymore questions?

[180sx_Drifter]

check your coilpacks. but before you do that check for any leaks. mine was sounding nasty and ended up being a loose nut on the manifold to turbo connection.

[sillyvia13]

I would say it's a clogged fuel injector!
while car is running, pull 1 injector electric plug off, if it doesn't make a difference in idle thats your cylinder with issue...

Remove injector and replace...

This is only a shot in the dark from what I have read...but I would bet 83% sure thats it... I will call cylinder #3 too! lol...


pm me when you check and lmk...hahaha...

[water]

Well you know your ecu is good but did you try another ecu on your car? There's always the possibility that its your harness.

When you look at the plugs, does any one look dramatically different than the others?

[TOMKAIRA93]

I beleive the problem is turbo manifold leak...if not, I will check "injector 3". LOL Nah, I should have an answer this weekend. I'm going to work on the gaskets and then check the injectors. I'll post my results when done.

[TOMKAIRA93]

I would say it's a clogged fuel injector!
while car is running, pull 1 injector electric plug off, if it doesn't make a difference in idle thats your cylinder with issue...

Remove injector and replace...

This is only a shot in the dark from what I have read...but I would bet 83% sure thats it... I will call cylinder #3 too! lol...


pm me when you check and lmk...hahaha...

I ended up replacing the turbo mani gasket (had a leak), but still didn't take the roughness away. I check all the injectors and discovered that when I pulled injector #1 the car would stay the same while the rest made a difference (ran worst). So you were right man...the only problem I have now is that the car still runs the same even after I replaced the injector. This is the weirdest thing ever...I mean, the car was running perfectly fine until my fuel pump hose took a plunge and now everything's going down hill.

To be honest and fair to everyone, I haven't attempted much after I replaced the injector...I figure I'd give it a few weeks. In the mean time, I've been working on the body in preparation for a paint job (will make new thread for this DIY Paint job). So yeah, I been having fun pounding the metal back to its original shape. LOL
But yeah, my car still doesn't run smooth, that's the bottom line.

[MomentumGT]

^Might be an O-ring :confused:

-Jon

[steve shadows]

What if someone did swap a 2.5 liter wrex motor in a 240....

hmmm

[TOMKAIRA93]

What if someone did swap a 2.5 liter wrex motor in a 240....

hmmm

that'd be interesting, but an SR sounding like one:down:

[unicoladron]

What if someone did swap a 2.5 liter wrex motor in a 240....

hmmm

it'd be a bitch to change the spark plugs lol

[rps13sh]

Dead coil pack.

I have extra if you want to buy a set or just one.

Edit...woops.

My bad...check the FSM.

How did you check the coil packs?

Burnt ECU?

Carlos

yes, what he said

[Neejay]

What if someone did swap a 2.5 liter wrex motor in a 240....

hmmm
I would LOVE to do this (as I plan on getting a wrx/sti).

That's what I was hoping for when I clicked this thread. :(

[johngriff]

Test for resistance on the injector plug to the corresponding ecu plug, and check for supply power on the other pin.

Then check spark.

If all that is good, its the injector/oring. Is it running rich/black smoke out of the tail pipe/check for burn on the spark plug.

John

[sillyvia13]

I ended up replacing the turbo mani gasket (had a leak), but still didn't take the roughness away. I check all the injectors and discovered that when I pulled injector #1 the car would stay the same while the rest made a difference (ran worst). So you were right man...the only problem I have now is that the car still runs the same even after I replaced the injector. This is the weirdest thing ever...I mean, the car was running perfectly fine until my fuel pump hose took a plunge and now everything's going down hill.

To be honest and fair to everyone, I haven't attempted much after I replaced the injector...I figure I'd give it a few weeks. In the mean time, I've been working on the body in preparation for a paint job (will make new thread for this DIY Paint job). So yeah, I been having fun pounding the metal back to its original shape. LOL
But yeah, my car still doesn't run smooth, that's the bottom line.


SHIT!
Sorry bro...I was hoping for #3...lol...
did you swap spark plugs?
and do a tune up...rotor cap wires...maybe a loose plug wire for dizzy.

You'll get it...
I just finaly fixed my #3 inj. after like 5 months..lol...I had it parked fo winta!

[SDS13COUPE]

^ No plug wires/caps/dizzy on SR's.
Check your ignitor chip wiring. I had the same issue with my #1 and when I pulled apart the wiring there was a shielding wire over the #1 injector wire(I think to block interference) and some of the shielding wire insulation was exposed and touched the injector wiring causing it to run like a subie. I trimed the insulation wire so nothing was exposed and connected the injector wire up and "Presto" it ran like a champ. If you need help or pics pm me. GL.

[celica3sgte94]

check your timing chain guide i had that problem with my sohc and the timing chain guide was broken. after i fixed that didnt sound like a wrx and my car stopped shaking

[BoostinGST]

didnt read the whole thread but it could be the cam position sensor taking a dump on you. either that or possibly a bad/loose ground, maybe the one on the back of the head for the coil pack harness.

[redline454]

had the same prob it was 2 of my coilpacks. replaced with new plugs and was running fine again

[s13.5ftw]

^^ listen to johngriff he's good (:

[TOMKAIRA93]

The problem with my car ended up being something dumb as hell...coil pack was bad. I swapped Coil pack 1 for coil pack 2 then proceeded to unplug injector 1 plug and the car started to crap out (that was good), then proceeded to do the same with plug 2 (injector) and nothing happened, the car kept idling like a WRX, so it was the coil pack! thanks to all the posted on the thread. I hope this helps other people in the future.

Peace!

[playastarkz123]

had a very similar issue with my sr a while back first time it happened it was due to a bad maf. it happened again but this time due to a clogged fuel filter. check your maf, grounds, fuel fiter and injectors.

[redtop91]

My SR was doing this but it wasn't firing on all cylinders so it ran rough all the time. Turns out it was the wiring for the coilpacks and not the packs themselves. You might look for corrosion in the harness to coilpack male/female connectors. It'd be a greenish power or at least it was on my SR. Good luck.

[TOMKAIRA93]

Well, i have determined it's the coil pack that's bad. I should get the new one tomorrow, so I'll know for sure. I think this should do the trick.