GrandAmGT.com Forum
http://www.pfyc.com GrandAmGT.com Premium Memership Signup
CustomCarGrills.com   

Go Back   GrandAmGT.com Forum > GAGT - Technical - Sponsored by www.MilzyMotorSports.com > Technical Q&A

Reply
 
Thread Tools Display Modes
Old 07-16-2014, 01:06 PM   #1
mach158
GAGT - Newbie
 
AKA: Curtis
Join Date: Mar 2009
Location: Walker, IA
Posts: 5
Vehicle: 97 grand am SE
mach158 Gettin' there
Cylinder misfire again. LIM or Head gasket?

I have a 2004 grand am with the 3.4. I am having problems again with a misfire in cylinder 1 (code 301) When engine is cold I can start it and it will idle rough and can smell unburned gas and after 15-20 seconds it smooths out and runs fine. If i try to drive in that 20 seconds it will bog down and have no power.

I have replaced the spark plug in this cylinder twice due to cracking of the plug. It has new wires as well.

My main concern is this may be a LIM issue or headgasket putting coolant onto that plug and causing the plug to go bad. I have no had a chance to dive in to look at it yet but last time I replaced the plug it showed no signs of being a LIM issue. Found no coolant in the oil or external signs. The only other thing I notice is i will gradually loose coolant over a long period of time. Like after 2 months my low coolant light will come on and only for a short period of time.

I am fine with doing a headgasket or LIM repair I would just hate to go through all that work for something I may be over looking so thoughts on this matter would be great.
mach158 is offline   Reply With Quote
Old 07-25-2014, 06:32 PM   #2
Dave Carney
GAGT - Member
 
Dave Carney's Avatar
 
AKA: Dave
Join Date: Dec 2006
Location: Derby, KS
Posts: 41
Vehicle: 2002 Grand Am SE Coupe
Dave Carney Gettin' there
I think it's your head gasket. Cylinder #1 is generally where they blow. Here is a pic of my wife's engine (2002 Grand Am) that I took during my teardown. Note how nice and clean the #1 piston is from the steam cleaning action of the leaking coolant.

Go ahead and tear it down, use a good felpro headgasket and the problem solver LIM gasket while you are at it. They are worth fixing.
Attached Images
File Type: jpg Cylinder One Blown.jpg (198.6 KB, 34 views)
Dave Carney is offline   Reply With Quote
Old 07-25-2014, 09:43 PM   #3
plastic_indian
GAGT - Member
 
plastic_indian's Avatar
 
AKA: Mark
Join Date: Apr 2008
Location: Naptown, IN
Posts: 422
Vehicle: 04 2DS
plastic_indian a trusted member
"cracking of the plug"? The old sparker shows an actual fracture in the porcelain insulator around the electrode? Fracturing a tip is typically caused only by a foreign body in the chamber or gross detonation in the affected cylinder. What flavor coolant is this power plant running? Green coolant leaves a telltale signature in a wet hole, but Dex often is misread. Post a pic of the offending plug. Contrary to popular belief, 3400s don't pop head gaskets with much frequency absent a legitimate overheat condition. If the plug tip is truly cracked, the head should come off for the purpose of inspecting the chamber for debris, if nothing else. If "cracked" is actually carbon tracking, a HG problem is not ruled out, but other problems can be ruled out before going to the bother of yanking the head; any liquid (coolant, wet fuel) can induce the spark to track down the tip to ground and leave a tracer. Does this cylinder post comparable compression/leakdown numbers to other cylinders, hot and cold?
__________________
Where was Bunkie when we needed him?

Quote:
Originally Posted by cardude007617 View Post
I'm pretty sure you don't need 600HP to merge safely onto a freeway. and if you do, you're doing it wrong.
Quote:
Originally Posted by bricooper78 View Post
how do you think i ever got girls to show up? i'm only paying for so many of them
plastic_indian is offline   Reply With Quote
Old 07-26-2014, 06:18 AM   #4
Dave Carney
GAGT - Member
 
Dave Carney's Avatar
 
AKA: Dave
Join Date: Dec 2006
Location: Derby, KS
Posts: 41
Vehicle: 2002 Grand Am SE Coupe
Dave Carney Gettin' there
Quote:
Originally Posted by plastic_indian View Post
Contrary to popular belief, 3400s don't pop head gaskets with much frequency absent a legitimate overheat condition.
I don't think that's true particularly if you read all the posts here, but I will just go on record as saying my wife's car had only 51k miles (easy miles) on it and had never overheated in the slightest. We also did a LIM at 22k. We had missing coolant and eventually tell tale white exhaust smoke.
Dave Carney is offline   Reply With Quote
Old 07-28-2014, 08:39 PM   #5
plastic_indian
GAGT - Member
 
plastic_indian's Avatar
 
AKA: Mark
Join Date: Apr 2008
Location: Naptown, IN
Posts: 422
Vehicle: 04 2DS
plastic_indian a trusted member
Quote:
Originally Posted by Dave Carney View Post
I don't think that's true particularly if you read all the posts here, but I will just go on record as saying my wife's car had only 51k miles (easy miles) on it and had never overheated in the slightest. We also did a LIM at 22k. We had missing coolant and eventually tell tale white exhaust smoke.
As always, Your Mileage May Vary, but from the perspective of an automotive professional, the percentage of 60 degree head failures occurring in concert with an overheat is very near 100% in personal experience. Phrased another way, those 3x00 head failures accompanied with "it never overheated!" stories, in my own experience, typically presented low on coolant with evidence of long standing coolant leak problems.
__________________
Where was Bunkie when we needed him?

Quote:
Originally Posted by cardude007617 View Post
I'm pretty sure you don't need 600HP to merge safely onto a freeway. and if you do, you're doing it wrong.
Quote:
Originally Posted by bricooper78 View Post
how do you think i ever got girls to show up? i'm only paying for so many of them
plastic_indian is offline   Reply With Quote
Old 07-29-2014, 05:06 AM   #6
AaronGTR
BlingWithBallz
 
AaronGTR's Avatar
 
AKA: Aaron
Join Date: Aug 2002
Location: Detroit area, MI
Age: 39
Posts: 12,197
Vehicle: 2000 Grand Am GT1 2dr
AaronGTR has made plenty of valid pointsAaronGTR has made plenty of valid points
I'm with Mark on this one. Head gasket failures are actually not that common on these engines unless they overheat. That's not to say it can't happen, but it would be in the minority of cases.
__________________
The few, the proud, the boosted!
13.788 @ 103.73 mph (3/2011) 320 whp and 300 ft/lbs torque. (3/2011)
See it here. the total package.
AaronGTR is offline   Reply With Quote
Old 08-10-2014, 07:07 PM   #7
mach158
GAGT - Newbie
 
AKA: Curtis
Join Date: Mar 2009
Location: Walker, IA
Posts: 5
Vehicle: 97 grand am SE
mach158 Gettin' there
Sorry for the delayed response, I thought I subscribed to this thread and never got an e-mail so I forgot all about it.

The car has about 90k miles on it and I have been putting the universal (or so it says its good with all coolants) coolant which is green in the car. I haven't had to add any for awhile and have not had a problem for the past couple weeks.

When I say the plug cracked I am referring to the porcelain outside of the cylinder. I have not noted any issues inside the cylinder with the spark plug. It could possibly be installer error I guess but I find it hard to believe the time frame is so far apart from install to issues if I cracked it during install.
mach158 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 01:31 AM.


Powered by vBulletin® Version 3.7.2
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright 2011 GrandAmGT.com
CustomCarGrills.com