Last post on Aug 11, 2013 at 2:16 PM
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Pontiac Trans Sport, Pontiac Montana, Van
#1377 of 1493 Dying while driving
Nov 26, 2008 (3:36 am)
I own a 2002 Pontiac Montana. Only 107,xxx miles on it. Recently the check engine light came on and the car started dying while approaching stop signs and just recently it died while slowing from 55 to 45 mph. It isn't doing it all the time though. Yesterday my wife had no problems and drove it about 60 miles. I had a diagnostic check done and it states that either, 1.O2 is bad, 2. Cylinder misfire, or 3. Injector bad. All of this is occuring to bank "1" according to the report. I am not sure an O2 sensor would make the car just die in mid driving. I was planning on starting with the O2 sensor only because of cost. Does anybody have any ideas or had this happen to them before?
#1378 of 1493 Re: Dying while driving [mbollwerk]
Nov 26, 2008 (7:41 am)
you might want to check the map sensor. i had a simular problem my car would shutoff as i was slowing down going into a turn. i changed all the crank sensors but it still did it until i changed ths map sensor ( the big air sensor attached to the air filter intake).
#1379 of 1493 Re: Dying while driving [bikeral44]
Nov 29, 2008 (7:21 pm)
Thanks for the idea! I will post again when I try this part.
#1380 of 1493 Block Heater - 2002 Pontiac Montana
Nov 30, 2008 (5:46 pm)
Can anyone tell me if the 2002 Pontiac Montana comes with a block heater stock? Another user told me depends on trim paxckage...how best to tell what trim package I have? Sorry..I bought this used....
#1381 of 1493 2000 Pontiac Montana
Nov 30, 2008 (8:42 pm)
I have a 2000 Montana and I have a problem when you hit a large water puddle it spits. sputters and backfires. I was told it could be a crank sensor problem. We also have a code coming up P0240 and code P0240P anyone have any ideas what these codes mean.
#1382 of 1493 Re: 2000 Pontiac Montana [Wanderin_Ed]
Dec 02, 2008 (8:06 pm)
You sound like you know allot more then I do but just wanted to share that after my nephew cracked my filter housing on my 1998 Pontiac Tran-Sport I had to be careful about going through puddles... I would lose allot of my power while driving due to the filter getting wet. It to would sputter. Sounded like a jalopy strolling down the street. It sounded bad but disapated as the filter dried out. You never know, Could be something so simple. Lol!!
#1383 of 1493 1998 Pontiac Transport with DTC P0420 showing every 50-100 miles
Dec 30, 2008 (2:20 pm)
I have a 1998 Pontiac that has been plagued with DTC code P0420 showing every 50-100 miles of rural driving. I have replaced the catalytic converter (after market) and the aft oxygen sensor. No other codes are showing up when read. I can clear the code and about 100 miles, it shows up again.
The code cleared for about 1500 miles after the cat was changed and started getting more frequent. The frequency has not changed with the replacement of the aft oxygen sensor.
Car runs fines and gets 19-22 MPH in highway/town driving.
Any suggestions would be much appreciated.
#1384 of 1493 Re: 1998 Pontiac Transport with DTC P0420 showing every 50-100 miles [fryman]
Jan 05, 2009 (3:37 pm)
P0420 is a unique code that will set when the pre and post o2 sensors toggle at the same rate and speed. ( indicating cat has no reserve capacity ) The ecm will also perform invasive testing of the cat. Many of the 3.4 engines are known for repeat head gasket and or intake manifold issues, extended operation with coolant contamination will damage cat. Have you noticed any coolant or Oil loss? The design of this engine and its intake gasket can cause engine oil consumption ( not as popular as coolant on this vehicle ) the only other suggestion would be oem converter I've obtained them from salvage yards opposed to generic.
#1385 of 1493 1999 Montana Rear Heater
Jan 18, 2009 (12:02 pm)
No vacuum going to the rear heater airbox to let hot air into the rear vents... anyone know where the vacuum line starts?! I'm pulling my hair out trying to find the vacuum source!
#1386 of 1493 Re: Dying while driving [mbollwerk]
Jan 23, 2009 (9:16 am)
I'm having the same problem with my 2005 Montana. Did you end up replacing the map sensor? If yes, did it help?