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Old 02-02-2011, 09:23 PM   #1
02GT_SkyHigh
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Misfiring #3 After LIM swap

this is an addition to my thread here; Oh, Just came home from USPS... . I'm really stuck with this one.

ok new problems. I stared it up this morning, went to a gas station and got a soda then on the way home, i feel the engine stutter during the last turn to my house.
Im having a miss in number 3. I know that cause I can pull that wire and the car still runs the same as if it was still on. All the others make the car almost die.
I keep on fouling out the plug also. I read this story.....
( Lower LIM change now MISSING?? Any opinions... )
So I went down to our local pick n pull place and i find a 2002 3.4L Malibu, So I get 3 injectors off and clean them all thoroughly, took the better looking one and replaced that injector.
Got it all back together about 5 minutes ago and I'm still having the same problem. No. 3 plug is all wet with FUEL not oil.
Im at a loss here any help.
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Old 02-02-2011, 09:27 PM   #2
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Check the plug wire boot that shares a coil with #3 to make sure it didn't pop off.
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Old 02-02-2011, 09:44 PM   #3
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Quote:
Originally Posted by Malaclypse View Post
Check the plug wire boot that shares a coil with #3 to make sure it didn't pop off.
I have solidly checked each plug and wire. I have tried swapping the plugs around.
If that one was off why would #3 misfire?
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Old 02-02-2011, 10:23 PM   #4
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Open circuit in the wiring harness @ #3 ignition ? Try to get ohm readings as far upstream in the harness as possible....
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Old 02-02-2011, 11:49 PM   #5
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Quote:
Originally Posted by AleroB888 View Post
Open circuit in the wiring harness @ #3 ignition ? Try to get ohm readings as far upstream in the harness as possible....
You believe that it may be in the wiring for that injector?
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Old 02-03-2011, 12:13 AM   #6
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Quote:
Originally Posted by 02GT_SkyHigh View Post
You believe that it may be in the wiring for that injector?
No, not if the plug is wet with fuel, I was thinking the spark is not being activated, possibly by an open or intermittant circuit...
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Magnuson MP90 / TOG's / 3 in. Magnaflow exhaust / MSD ignition / LS1 MAF / Racetronix pump / HP Tuners / TCE 68mm TB / 36 lb Inj
= Best track time: 12.951 @ 104.48, 1.839 60 ft. (Beech Bend Raceway Park, 11-23-13), 50 Deg. F
http://www.youtube.com/watch?v=hpVYZPbpPzk
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Old 02-03-2011, 08:13 AM   #7
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Quote:
Originally Posted by AleroB888 View Post
No, not if the plug is wet with fuel, I was thinking the spark is not being activated, possibly by an open or intermittant circuit...
If I pull that wire while the car is on, the idle dosent change and I can clearly see and hear a spark shooting out of the boot.
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--Big 3 Electrical Upgrade--Kicker SX650.1 Monoblock--Kicker CVX12"D4--Ported Box @ 1.88^ft to 34hZ--Alpine CDA-9884--Cadence 6.5" Component's--
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Old 02-03-2011, 08:31 AM   #8
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I have a feeling it's not ignition or fuel.

Sounds like you possibly floated a valve. Happened to my GA back in may, cylinder #3 for me as well. Common with 60*V6's in their older age.

Have a compression test done on cylinder #3.
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Old 02-03-2011, 09:09 AM   #9
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Quote:
Originally Posted by [ChaosweaveR] View Post
I have a feeling it's not ignition or fuel.

Sounds like you possibly floated a valve. Happened to my GA back in may, cylinder #3 for me as well. Common with 60*V6's in their older age.

Have a compression test done on cylinder #3.
As I search more and more that what it is pointing too.
Could you tell me exactly what a 'floated valve' is, plz?
And yes Im going to try a compression test today when I can.
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--Big 3 Electrical Upgrade--Kicker SX650.1 Monoblock--Kicker CVX12"D4--Ported Box @ 1.88^ft to 34hZ--Alpine CDA-9884--Cadence 6.5" Component's--
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Old 02-03-2011, 09:40 AM   #10
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One of the valves is stuck shut, no air, no combustion.

I really hope you know someone to help with repairs, that's a +$1000. Luckily, I got a helluva deal from a good friend, was only charged $350.
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Old 02-03-2011, 09:53 AM   #11
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Quote:
Originally Posted by [ChaosweaveR] View Post
One of the valves is stuck shut, no air, no combustion.

I really hope you know someone to help with repairs, that's a +$1000. Luckily, I got a helluva deal from a good friend, was only charged $350.
For a Valve job? or just to switch heads? cause I can go back to the mailbu that i got the injectors off of and go rip the head off the back.

Im about to take the rear valve cover off and check the workings of the rockers and what i can see.

I knew this one shoulda waited...
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--Big 3 Electrical Upgrade--Kicker SX650.1 Monoblock--Kicker CVX12"D4--Ported Box @ 1.88^ft to 34hZ--Alpine CDA-9884--Cadence 6.5" Component's--
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Old 02-03-2011, 10:17 AM   #12
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To properly do a valve job, the head needs to come off the block.

I'd be leery of slapping on a head from a junk motor. To boot, Malibus had the LG8 motor, the GA has the LA1. I'd find another LA1 head if you're going to rebuild it.
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Old 02-03-2011, 11:15 AM   #13
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after Removing the back valve cover one of the rockers was just laying there!!! I tq'd them properly and only did an additonal 20* not 30*! MAN WTF, I'm not the type to pass up some crucial process like TQ'ing the rockers! Ummm now what?


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2002 GAGT
Sitting in the driveway with no motor.
--Big 3 Electrical Upgrade--Kicker SX650.1 Monoblock--Kicker CVX12"D4--Ported Box @ 1.88^ft to 34hZ--Alpine CDA-9884--Cadence 6.5" Component's--
http://www.cardomain.com/ride/391881...am-gt-sedan-4d

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Old 02-03-2011, 11:37 AM   #14
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Quote:
Originally Posted by 02GT_SkyHigh View Post
after Removing the back valve cover one of the rockers was just laying there!!! I tq'd them properly and only did an additonal 20* not 30*. Ummm now what?
Were pushrods, etc. marked and re-installed each in their original locations?
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Magnuson MP90 / TOG's / 3 in. Magnaflow exhaust / MSD ignition / LS1 MAF / Racetronix pump / HP Tuners / TCE 68mm TB / 36 lb Inj
= Best track time: 12.951 @ 104.48, 1.839 60 ft. (Beech Bend Raceway Park, 11-23-13), 50 Deg. F
http://www.youtube.com/watch?v=hpVYZPbpPzk
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Old 02-03-2011, 12:13 PM   #15
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Quote:
Originally Posted by AleroB888 View Post
Were pushrods, etc. marked and re-installed each in their original locations?
Yes they were I used a marked shoe box with holes in it when I took them out. You can also look at the rocker location and tell if its short or long.
I'm #4 to own this car and when I did LIM gaskts the first time, it already had metal frame gaskets in it. I'm thinking that possibly this time when I did the second step of TQ'ing, that the threads had been slightly abused before, cause I know the feel of when I strip a thread and an already striped thread. I got about 10* and the resistance was gone.... Eeeh, Heli-coils are interesting looking..
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--Big 3 Electrical Upgrade--Kicker SX650.1 Monoblock--Kicker CVX12"D4--Ported Box @ 1.88^ft to 34hZ--Alpine CDA-9884--Cadence 6.5" Component's--
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Old 02-03-2011, 06:23 PM   #16
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Ouch that really sucks
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Old 02-03-2011, 06:27 PM   #17
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DONE! What a PITA! I spent $56 on a 10mm 1.5 thread Helicoil set. It has the special tap, the insertion tool, and about 10 coils. Worked like a charm!
Thanks to all for all your help and feedback! Everyone has to learn and the passing of that knowledge is what makes this forum so great!




CAPTURED THE SHAVINGS JUST LIKE PLANNED


TAPPING IT OUT


TAPPED AND READY FOR THE HELICOIL


INSERTING THE HELICOIL


RIGHT BEFORE I BROKE THE INSERTION TAB OFF
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--Big 3 Electrical Upgrade--Kicker SX650.1 Monoblock--Kicker CVX12"D4--Ported Box @ 1.88^ft to 34hZ--Alpine CDA-9884--Cadence 6.5" Component's--
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Old 02-03-2011, 07:10 PM   #18
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Good job on the heli-coil. Hope you used loctite on the outside of it when you installed it. Red would be preferable.
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Old 02-03-2011, 07:23 PM   #19
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Quote:
Originally Posted by Malaclypse View Post
Good job on the heli-coil. Hope you used loctite on the outside of it when you installed it. Red would be preferable.
Umm, no loctite.
Nothing in the directions said anything about it. This was my first try at any tap, dye, helicoil action. I guess it makes sense now why I SHOULDA. Damn the instructional vids on youtube they dont use any either.
Not going to stress on it.... Done too much of that the past few days...
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Sitting in the driveway with no motor.
--Big 3 Electrical Upgrade--Kicker SX650.1 Monoblock--Kicker CVX12"D4--Ported Box @ 1.88^ft to 34hZ--Alpine CDA-9884--Cadence 6.5" Component's--
http://www.cardomain.com/ride/391881...am-gt-sedan-4d
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Old 02-03-2011, 08:37 PM   #20
Malaclypse
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Quote:
Originally Posted by 02GT_SkyHigh View Post
Umm, no loctite.
Nothing in the directions said anything about it. This was my first try at any tap, dye, helicoil action. I guess it makes sense now why I SHOULDA. Damn the instructional vids on youtube they dont use any either.
Not going to stress on it.... Done too much of that the past few days...
You'll be fine. The only possible problem is that the heli-coil may back out if you have to remove the rocker arm bolt again. Hell, sometimes they back out even WITH loctite.

You can completely circumvent that problem by buying one of these: http://www.denlorstools.com/home/dt1...d_remover.html . One of the best ways to spend $20, in my opinion.

Makes life so much easier. Hell I did an intake on a 3400 Grand Am in 3 hours today and I was taking my time. That tool helped out alot.

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