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Pontiac Montana Engine Problems

46 messages,  Last post on Oct 27, 2009 at 8:02 AM

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What is this discussion about? Pontiac Montana SV6, Engine, Van


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#1 of 46
Engine Work by beowulf58
Nov 24, 2006 (5:23 pm)
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My wife owns a 2000 Montana. The coil pack is bad and needs to be replaced. My question is, how does one get to it? I've heard that the engine needs to be rolled foward to get to the components in the back but I have never figured out how. If it wasn't for that, I would have it fixed by now.
I fix airplanes for a living so I'm quite mechanically inclined. Anyone know how to "roll the engine" or is there something I'm missing? Thanks in advance.
#2 of 46
Re: Engine Work [beowulf58] by flm773
Jan 02, 2007 (12:44 pm)
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Replying to: beowulf58 (Nov 24, 2006 5:23 pm)

Sounds like you need to rotate the engine. Here is info from my '99 shop manual on how to do this:
 
1. Remove the throttle body air inlet duct.
2. Set the park brake.
3. Shift the transaxle into Neutral.
4. Remove the engine mount strut bolts. Swing the engine mount struts aside (both left and right struts go from the engine to the front of the van).
5. Install the J41131 (I used a pipe clamp on the engine to the front frame to pull the engine forward toward the radiator).
#3 of 46
lemon by blg1
Jan 10, 2007 (6:21 am)
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hi i just bought a pontiac montana on dec 20 of 2006 it's has been in the shop since i bought it has engine problems such as low oil pressure it has enough oil and the service engine light kepis coming on the service center at the dealership they can't find out what wrong with it when the check the codes nothing come back with no problem. has anyone had this problem? it's been a nightmare since i got this montana
#4 of 46
Re: lemon [blg1] by beowulf58
Jan 11, 2007 (6:27 am)
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Replying to: blg1 (Jan 10, 2007 6:21 am)

Join the club! Shortly after my first post, I found all my anti-freeze in the oil. Needless to say, it sits in my friend's garage while we take it apart trying to find out if the head blew or just the head gasket. In my research, it is a common problem on the 3.4 liter engines used in many GM makes.
 
Blg1, my Montana has been in and out of the shop since we owned it. Yes, they always need something and they get alot of "Ghost codes." You know, codes that are there but aren't? If it wasn't for the cold, I'd be in my old 1970 Dodge Challenger. An engine without a computer is an easy engine to troubleshoot. Yes, I look foward to getting rid of the Montana.
#5 of 46
Re: lemon [beowulf58] by blg1
Jan 11, 2007 (6:38 am)
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Replying to: beowulf58 (Jan 11, 2007 6:27 am)

i just got my montana back from the shop. they told me they had to recalibrate the computer. well see how long that works or maybe something else will go wrong i hope not
#7 of 46
HELP! 2004 Pontiac Montana. by dsgentili
Mar 11, 2007 (5:34 pm)
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Having the followig problems, all of which happen sometimes. Sometimes when I start it the car idles fast. Sometimes if I turn it off and then on again it will idle normally, sometimes not. Sometimes when I drive I take my foot off the accelorator and the car doesn't slow down, sometimes it will even speed up. Sometimes from a stop the car hesitates and "bucks" when accelerating. Sometimes on the highway the motor will rev for just a second, then go back to normal.
 
Most strange, twice in the past 6 months, both times at highway speeds, the gas guage has gone from full to empty in just a few minutes. I stopped the first time to see if I had a leak in my gas tank. I've had it into the shop 6 times. They cannot get it to "act up" when it's there and don't have a clue. Thanks for the help.
#8 of 46
might be a gas problem by jegjc
Mar 14, 2007 (11:39 am)
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is your gas filter new ? is there gas restriction (pinch some where) ?
 
injectors clean ? Loose wire in the control pannel ?
 
  many question in fact can put you in trouble
 
  byeee jegjc québec city canada
#9 of 46
Re: might be a gas problem [jegjc] by dsgentili
Mar 16, 2007 (12:12 pm)
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Replying to: jegjc (Mar 14, 2007 11:39 am)

Will try filter and cleaning injectors first. Thanks for the suggestion.
#10 of 46
Re: HELP! 2004 Pontiac Montana. [dsgentili] by ejg80s
Mar 24, 2007 (10:37 am)
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Replying to: dsgentili (Mar 11, 2007 5:34 pm)

I have the same gas gauge problem with my 1997 Trans Sport Montana. It usually happens when it gets below 1/4 tank and then the gauge pegs out to full. Does not happen all the time.

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