Since Chris requested and I hope helps

Well it began with my lack of knowledge of the PCV system. My setup prior to all this mishap was the PCV hose with a breather filter @ the end. Well it would leak oil vapors so I was tired of the smell. I removed the small breather filter and used a T shape plastic connector to connect the PCV hose with a hose coming from the throttle body and a hose from the brake booster.

I turned on the car and it revved up like I steping on the gas. I test drove it around the block and I didnt even need to step on the gas to take off. High RPM"s along with smoking like crazy from the muffler and I even saw some smoke coming from the headers. I noticed the exhaust gasket had some oil stain.

I removed the T shape connector and put everything back to normal like it was. It still would misfire. I removed the intake manifold and throttle body and there was alot of oil inside. I cleaned them all up and even the valves and intake ports. I bought some new spark plugs and still it would misfire.

A friend of mine said its because my intake manifold isnt sealed correctly causing a vacuum leak which allows more air to enter the engine. He said with the added air the computer has injector # 4 spraying more fuel to compensate for the added fuel...thus wet the spark plugs with fuel which is why cylinder #4 does not fire.

I turned on the car and we removed injector #1 and the engine would misfire even MORE. So we connected it back in. We did the same to injector #2 and #3 and it would misfire even more. BUT once we got to injector #4 and disconnected....it made no difference. Thus cylinder #4 was not firing.

We sprayed carb. cleaner near cylinder #4 and it would idle and get that cylinder to fire. So my friends theory is the vacuum leak is the issue.

I tested the coil packs and the module for resistance and all were good. I then tested the coil pack housing and one of the springs was not giving a constant reading. So I bought a new coil pack housing and still same problem.

All i got left is to swap to 2.2 coils and spark plug along with making my own gasket for the intake manfold and see if that helps.


GMR has got nothing on this

DO IT! 2.2 coils are amazing.



"still want to smash that like the fist of an angry god"

I'm confused as to why you posted this because I think you answered your own problem. It is not a coil/spark issue, but injector issue. The ECU is not going to increase the fuel to one injector, but all injectors.

Just in case when you check your coils, did you swap them? Mean the one on plug 3 and 4 move to 1 and 2? This would rule 100% a spark issue.



FU Tuning

Get one bottle of this.



Follow the instructions to a T (don't worry it wont hurt the rotors, if you are worried, use a vac line off the FPR to let it get in to the motor.

Also, put one bottle of this



In to your tank, with no more then 10 Gallons, mix well. (This is who makes the GM stuff, but a lot less money)

I don't think you have an injector out, but the injector cleaner is good @!#$.

Depending how long you drove, it is quite possible that the cylinder is ring washed.

The fact that you spray carb cleaner on the injector....right? has me a little confused. it should still run even if the O-Rings are shot.......

Unless the timing of an injector failing was that good.......

Try this and let me know.

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Also for o-rings, they didn't have mine listed but my buddy working had a 305 TPI? Camaro whom said his looked identical, we pulled them up, got 'em and they were. So then you have an extra 4 if ever needed @ a later date.

I'll give that a try thankz chris. As for spraing carb cleaner...I dont spray directly on the injector. I spray it on the intake manifold gasket right where it meets the head.

So what year camaro o-rings should I get?


GMR has got nothing on this

intake leak..... that should make it run rich.........

take the blower off, you can go to a hardwear store and get the charger O rings. just bring your in to match up.


Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Chris, where do you see a blower?

His mullet mobile was an early 90's with the TPI I believe.

lol

For some reason i thought his Alero was supercharged...

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

^wrong Alero....thats Ion with the red Alero.

I am running rich. What charger O-rings? On a side not I tried injector cleaner and still no diff. Can I only get that GM stuff from the dealer? What about seafoam....would that help cause i got some laying around just not sure if I should try it.


GMR has got nothing on this

when its running, can you feel it "clicking"?

also, it will help with diag if you swap what port that injector is on.

IE, we know CYL 1 is not firing, and CYL 4 is, swap them and see if its the injector or not.


The supercharger has O rings for a intake gasket.


Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Quote:

The supercharger has O rings for a intake gasket

True but he does not have a charger, but a 2.3 intake manifold.



FU Tuning

Taetsch Z-24 wrote:lol

For some reason i thought his Alero was supercharged...

Chris

I know.

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

I did do that. Cylinder 4 wasnt firing so I swaped the injector with cylinder 2 and now it fires....?....weird. And it'll idle fine but sometimes when I push the gas it turns off or trys to


GMR has got nothing on this

DOHC_tuner wrote:I did do that. Cylinder 4 wasnt firing so I swaped the injector with cylinder 2 and now it fires....?....weird. And it'll idle fine but sometimes when I push the gas it turns off or trys to

Did cylinder 2 stop firing when you swapped?



FU Tuning

First off don't hook the pvc hose you had a breather on to a vaccum source at all. It will draw all the oil that is suppose to be going in the oil sperator to the crank case into the motor and burning it. Either leave the breather hooked to it leaving it vented or hook it to the intake before the throttle body.

How do you know you have a missfire and not a bad injector? It could be either. Say you aren't getting spark causing the miss and just because you unhooked the injector on that cylinder doesn't mean it's the intjector. With out spark or fuel to begin with and getting rid of both isn't going to do anything. From what i gather by your last post you flip flopped the injectors.

But if you really go it tracked down to cylinder 4 not firing or getting fuel. But from your last post it seems like you are trying to say you took cylinder 4 injector and put in two and now its working. When you say working how do you mean? That cylinder 4 is firing and cylinder 2 is not now? If so you have a bad injector. If they are both working it sounds like you had a loose connection. Or if swapping the injectors didn't change cylinder 4 meaning it is still the one dead. Well you are either not getting spark or your wiring to the injector is broke somewhere or possibly in the computer.

Also on another note what was the point in hooking up the pvc hose to the intake when you don't have the ho manifold drilled and tapped for the 2.4 pvc system any way?
And the injector o-rings for a 2.4 are the same for the 2200, a lt1 in the trans am's,camaros,corvettes. And the same for all gm tbi v8 motors. Possibly the ls1 but not sure.

Also by trying to shut of . Either the oil you got in the intake mess up the sensors. Possibly map. Maybe even messed up your 02. That or you have a vaccum leak

Yes I id swap the injectors and they both now worked fine...so it began to start and idle without misfiring...yet once I apply the pedel she wants to shut off. Then when I get it to rev it goes like so.............revvvvvPOPrevvvvvvvvvPOPrevvvvvvvvvvPOPrevvvvvvvvvPOP.....<--------------just like that....it still misfires.

I removed all the sensors on the tbody and sprayed them clean....could the 02 cause a misfire or even for the car to die when I push the air peddle?

I know I have a vaccum leak on the intake manifold....Im gonna take care of that by making a custom gasket cause this 2.4L flange seems to not be sealing properly.




GMR has got nothing on this

So you switched injectors around and all of them are working now? If so i would say you had a loose connection the injector. But then again i'm not sure but what i gathered you previously unhooked them and plugged them in with no change. If so You might want to check for breaks in the wires on the injector harness just iin case. Also make sure to check the harness.

Now as to your popping. How much oil did it suck out of the pan and burn? If it was around a quart or a half. I'd hate to say it didn't foul the plugs. Change your plugs out and see what it does. The popping you are saying you have from past experience can come from fouled plugs, coil packs breaking down/going bad, plug boots not contacting with the plugs causing spark to jump to other cylinder( check for this by pull the idi cover off and look for black streaks on the coil pack housing, housing could also be bad). Either that or it possibly jumped time being a new motor. But unlikely.

Now if you have a vacuum leak. When you would rev it up and it would idle down and try to shut off. This is mainly due to the vacuum leak messing with the map sensor. The way you say though when try to rev it up it trys to stall. So i have to ask what did to clean your sensors with? Also make sure the regulator is plugged back up after removing the intake. I've done that a few times. Also the o2 sensor shouldn't clear cause problems like you are saying but could possibly. But sounds more ignition related. Maybe someone else will chime in.

DOHC_tuner wrote:Yes I id swap the injectors and they both now worked fine...so it began to start and idle without misfiring...yet once I apply the pedel she wants to shut off. Then when I get it to rev it goes like so.............revvvvvPOPrevvvvvvvvvPOPrevvvvvvvvvvPOPrevvvvvvvvvPOP.....

you definitly need to make a new gasket. i ended up making 2 custom gaskets for either side of my adapter flange. but make sure you do not block off the pvc hole in the head between cylinders 2 and 3. i would definitely fix your vacuum leak on the manifold before you go digging into other things. i have a feeling this is caused by your leak.

I also feel it could be the vacuum leak but why all of a sudden now? Did the oil burn the original gasket or what?


GMR has got nothing on this

It shouldn't have did anything at all but be sure to change your plugs as i said. One of them could be fouled from the oil burn off. unless you done did. But as for your leak it could be that the bolts just needed tightened up because of a few heat cycles or something. Or possibly a vaccum leak in a hose that could be cut or broke off. Or the throttle body might be loose.

Also check your fuel injector o rings. When removing and install the fuel rail. Take some oil or vasoline and smear it around the the orings so they will slide in the head better. Other than that i honestly don't know what would have happened.

Your reving issue sort fo sounds like a bad TPS, but first fix the leak at the manifold since you know you have that problem. It could resolve all your issues. Until you fix that there is not reason to keep talking about it really.



FU Tuning

where did you get your gasket material from? How did you get one thick enough to match the original thickness?


GMR has got nothing on this

whats with the "custom gasket" ? when i did the 2.3 mani on a friends i used the 2.3 gasket and it worked great...what are you guys using?
and DOHC have you changed your injector orings? those can cause vacuum leaks as well.