Runs on 3 cylinders until warm?

[95gst16g]

Okay so lately I have been having all sorts of fun little issues and here is the one that I cant figure out.When I first start the car and its cold outside it idles like its on 3 cylinders.Once it gets warm it idles fine.If I leave and just let it idle like crap it dies sometimes.I replaced the plugs and gapped them at .25 that I always gap them to because I thought that would solve it....It didnt,then I ordered some new plug wires and slapped them on real quick.It still does it,Would a coilpack maybe cause this issue?If the car is warm it comes out of it so when I leave it parked after being driven and its still warm it fires up and sounds just fine.Sorry for the long post just trying to explain as well as I can.Thanks for any help You guy can give me.

 

[RayBan GST]

plugs should be gapped at 0.28 , check your injectors by unplugging them one by one at a time and check for changes, when you inplug the injector the engine should vibrate. , it might be a clogged or stuck injector or two. it happened to me before.

do also a boost leak test also and let us know.

 

[95gst16g]

plugs should be gapped at 0.28 , check your injectors by unplugging them one by one at a time and check for changes, when you inplug the injector the engine should vibrate. , it might be a clogged or stuck injector or two. it happened to me before.

do also a boost leak test also and let us know.

I have always gapped the plugs to .25 I know you are supposed to gap them bigger but .25 has always worked for me.I will try .28 just for shits.As for the injectors they are new pte 1000cc's they have only been in there for a few months.I can shut off injectors on dsmlink no need to unplug them.I know what it does when you shut 1 injector off....Thats just how its acting.I need to do another BLT but I have just been lazy I wouldnt think it would cause any of my issues but then again who knows....I guess I will regap the plugs and do a BLT tomorrow and see what happens

 

[meatball185]

ive seen problems like this when the head gasket is either partially or completely blown. check your coolant level if it is low its possible it is leaking into the dead cylinder but when it warms up and burns off it will act as if you never had an issue

 

[RayBan GST]

I have always gapped the plugs to .25 I know you are supposed to gap them bigger but .25 has always worked for me.I will try .28 just for shits.As for the injectors they are new pte 1000cc's they have only been in there for a few months.I can shut off injectors on dsmlink no need to unplug them.I know what it does when you shut 1 injector off....Thats just how its acting.I need to do another BLT but I have just been lazy I wouldnt think it would cause any of my issues but then again who knows....I guess I will regap the plugs and do a BLT tomorrow and see what happens

why on earth you need a 1000 cc injectors????? i saw your mods and you really dont need them .

again shutting off injectors from DSM link will not tell you if these injectors are clogged, go the old way and plug them one by one. try it and let us know

 

[Richrx_tsi]

if you have 1000cc injectors who tuned it? Maybe its just a bad tune

 

[95gst16g]

I hope its not my HG but I just changed it so you never know.....Why do I have 1000cc injectors?Why not I'm going to switch to e-85 and I have the means to control them so I bought 1000's instead of buying injectors 2 different times.Last I am sure my tune is pretty good.....Lucas English tuned the car

 

[95gst16g]

Okay well I just got back in from doing a compression test and a wet BLT.The compression was verrryyyy consistant,I had a boost leak at my compressor housing where I have a nipple for my MBC.I got the leak fixed.Anyone else have any idea what this could be?

 

[KFT0001]

You'll need to use a process of elimination to narrow down the source of the problem.

First determine which cylinder is misfiring. Probably easiest to just start yanking plug wires until you find the one that makes no change to the engine when it's running rough.

Next figure out if it's fuel or spark related. Test for spark. Use a tester if you have one, otherwise a sparkplug will do. If you have spark, then test for fuel. Test for fuel by switching the injector from that cylinder to another cylinder and see if the problem follows it.

If no spark, test the coils/ power transistor box.

If there is spark, and the problem doesn't move to another cylinder when swapping an injector, check injector harness and wire continuity.

 

[rEclipserGST]

You'll need to use a process of elimination to narrow down the source of the problem.

First determine which cylinder is misfiring. Probably easiest to just start yanking plug wires until you find the one that makes no change to the engine when it's running rough.

Next figure out if it's fuel or spark related. Test for spark. Use a tester if you have one, otherwise a sparkplug will do. If you have spark, then test for fuel. Test for fuel by switching the injector from that cylinder to another cylinder and see if the problem follows it.

If no spark, test the coils/ power transistor box.

If there is spark, and the problem doesn't move to another cylinder when swapping an injector, check injector harness and wire continuity.

Yeah, do what he said. Honestly, it looks like you do not have any other fuel mods. Are you still pushing the stock fuel pump? Hopefully you plan on switching that out when you go e85

 

[95gst16g]

Yeah, do what he said. Honestly, it looks like you do not have any other fuel mods. Are you still pushing the stock fuel pump? Hopefully you plan on switching that out when you go e85

No my mods list probably isnt to date I have a wally 255.But I guess I can do what he said .I'm just a lazy ass I'm tired of it but whatever I will just do it and be done with it.Damn DSM!

 

[95gst16g]

Ahhhh I think I hate my life!I just pulled all the plugs and took a flashlight and had a looky down the cylinders...All was well until I looked at #4 there is coolant on top of the piston!I just bought a new head and replaced the Hg like 2 months ago.This is annoying,The car has not been pushed at all since its been fixed so I'm guessing the gasket just didnt seal up good enough.IHATEMYDSM!!!!!!but I love it too.I used a stock mitsu gasket last time with copper spray what do you guys recomend to use for a HG?

 

[95gst16g]

Okay so I saw what looked to be coolant on top of the #4 piston but then today I want out and started the car and turned of #4 injector and the car ran significantly worse.Then proceeded to turn them off one by one and I got to #3 and the car made no changes whatsoever.So it looks like maybe #3 is not getting fuel or spark until its warm what would cause this.When I get the time I'm going to look at #4 again and see if there really is coolant on top.I think I will put a white cloth on the end of a coathanger or something and rub it on the piston to see if its coolant?

 

[BigTerbo]

sounds like a plan...


oh and 1000cc injectors... shit... my next set will be like 1250s cause im running e 85 right now and its just not enough with my small turbo. my 14b is running a 82% IDC on 780s

 

[95gst16g]

When this stupid car breaks and does crap like this I hate it but then when its running good I love it.Yeah I am planning on switching to e85 and a bigger turbo I only want to make like 400hp but I wish I got even bigger injectors.My theroy is instead of having instaboost at 3200rpm the bi turbo will ease into the boost a bit to give me a little more traction.Instead of having a huge spike in power at 3200.

 

[95gst16g]

Okay well I worked on the car a bit before I have to go to work.I pulled the plugs and still on #4 it was wet.I made a clothes hanger strait and taped a chunk of napkin on the end and rubbed it around on the piston...It made me happy to realize its not coolant but actually gasI hooked the plug up to the wire and grounded it and there was absolutely no spark at all....The rest had spark just the one with gas had none.I think its the coilpack or something.

 

[Hubbell91Tsi]

recently i converted my car to e85 and it seemed like it ran on 2 cylinders until warm... Well last night i raced a sr swapped 240 and kicked its ass but i blew 2 coolant hoses and dropped two cylinders... turns out my headgasket has been blown for about a month . #1 and #4 it pretty much ate the headgasket.

 

[95gst16g]

recently i converted my car to e85 and it seemed like it ran on 2 cylinders until warm... Well last night i raced a sr swapped 240 and kicked its ass but i blew 2 coolant hoses and dropped two cylinders... turns out my headgasket has been blown for about a month . #1 and #4 it pretty much ate the headgasket.

That sucks,But I'm not sure what that has to do with my problem...I have no spark in 1 cylinder.Anyone know what that could be?I think coilpack maybe it has a break in the circuit and when the coilpack gets warm the metal expands and connects and makes the coil start to fire.

 

[bomper04]

i wouldn't think it's that..we run on the wastespark system so if one's not producing a spark then i would figure the corresponding one wouldn't as well.

 

[95gst16g]

i wouldn't think it's that..we run on the wastespark system so if one's not producing a spark then i would figure the corresponding one wouldn't as well.

Well I dont know what the hell else this could be.Brand new plugs and wires so we can rule that out.I actually only tested #3 and 4 for spark...So #4 and number 1 should both be dead if it were to be the coilpack?

 

[1992GSX]

Let me start by saying I'm in love with your car. IMO, one of the cleanest, best looking 2g's out there. To me it sounds like your coilpack. I would check continuity of the wires, both before and after the coilpack, if its good, try and get your hands on a good pack and see if that fixes your problem.

 

[95gst16g]

Let me start by saying I'm in love with your car. IMO, one of the cleanest, best looking 2g's out there. To me it sounds like your coilpack. I would check continuity of the wires, both before and after the coilpack, if its good, see if you cna get your hands on a good pack and see if that fixes your problem.

Hahaha thanks but to be honest the car looks kind of shitty.It has lots of dings and a crease on the door from being flung open to where it hit the fender and the front bumper is rattlecanned in pics the car looks pretty badass but in person looks kind of bad...I and going to get it repainted and all that good stuff I'm thinking this summer after I get tax money.I think I will just get another coilpack and see what happens.I think I should buy a multimeter too

 

[95gst16g]

Okay,so today I finally got a day off and decided to fix the dsm.I went and bought a new coilpack and the car still misses bad.I tried the coilpack and new transistor and still does the same thing.I get spark just 2 cylinders its a little weaker than the other 2.I just want this problem to go away.Would maybe a bad coolant sensor make it do this?But then again the sensor logged fine in dsmlink so I dont think its that.Maybe a leaking injector?But I dont even know how I would test that and what I could do to fix it besides buy new ones.The injectors were bought brand spanking new and only been used since summer time to now.