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Pontiac Grand Am Hesitation

19 messages,  Last post on Mar 18, 2009 at 9:23 PM

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#1 of 19 Hesitation and bucking by mekie1 Aug 18, 2007 (4:18 pm)
My 2000 Pontiac Grand Am hestitates and bucks when I am driving. What could be the problem? Replies to this message: pbowers (Oct 14, 2007 8:21 am) egryeyes (Apr 02, 2008 1:30 am) kimp123 (May 10, 2008 6:02 pm)
#2 of 19 Need More details by gtx Aug 18, 2007 (8:43 pm)
It could just be you need a tune up, but it could also be more serious. The more details about symptoms, the better.    When was the last tune up and what was done? Are you using good gas? How long has it been going on and how did it start?
#3 of 19 miss-fire on 1 and 3 by cardancer Sep 08, 2007 (5:34 pm)
get your thinking caps ready. '99 grand am 2.4 quad four. miss fire on 1 and 3. replaced both coils, module, and plugs. have fire on all plugs, have power to all injectors. still missfiring. possible slight timing jump??? 2 injectors clog at the same time??? I'e got 2 GM master techs stumpped with this one. HELP!!!
#4 of 19 cured. by cardancer Sep 10, 2007 (6:52 pm)
replaced the coil tower, housing, whatever you want to call it. bingo. internal failure somewhere without any external signs at all. it actually looked pretty new.
#5 of 19 Grand Am Hesitation by dave4825 Oct 08, 2007 (4:08 am)
Similar to another message...2004 Grand Am 3.1 6 cy Auto, 36000 miles; tends to hesitate as in misfire (or so it seems) when the engine is cold. It goes away quickly but is irritating. Hasn't stalled when this happens yet. Gets about 25-30mpg in town. No check engine lights coming on or anything. Any advice for a novice? Filters to look for and change, etc., before taking it in? Thanks for any advice. Replies to this message: dave4825 (Dec 28, 2007 4:45 pm)
#6 of 19 Re: Hesitation and bucking [mekie1] by pbowers Oct 14, 2007 (8:21 am)
Replying to: mekie1 (Aug 18, 2007 4:18 pm) Have you found out if is an lockout swtich by the torque converter but in the value body? Transmission people called it an torque conventer lockout swtich but some my say it's and torque conventer neutral lockout switch. Please let me know. Parts places don't have any parts but maybe a dealer I will check tomorrow and let you know.  Thanks
#7 of 19 2002 Grand Am GT speed gain, slippage by motorpig4 Nov 08, 2007 (4:08 pm)
My 2002 Grand Am GT is fine around town but when I try to roll up to highway speed, it takes forever. Stomping the accelerator does no good, it just revs like the tranny is slipping, then finally shifts, etc...   My mechanic ran a diagnostic test and everything comes back normal. Tranny fluid is fine.   He mentioned that the catalytic converter might be going (or gone) bad. Does this sound odd to anyone and is there anybody else who's had this problem?   thanks, Reed Replies to this message: momof3divaz (Dec 28, 2007 10:50 am) rich99 (Feb 22, 2008 7:52 pm) momof3divaz (Feb 22, 2008 10:17 pm) rich99 (Feb 23, 2008 3:05 pm)
#8 of 19 Re: 2002 Grand Am GT speed gain, slippage [motorpig4] by momof3divaz Dec 28, 2007 (10:50 am)
Replying to: motorpig4 (Nov 08, 2007 4:08 pm) I've had the same problem for a few months now. At first it wasn't that noticeable, but now it's gotten to where I'm terrified of driving on the highway for fear of being run over! I had a diagnostic test run and I was told that my catalytic converter is clogged. The dealership quoted me a price of $800 or higher. Ridiculous right?!? I called a second dealership and the guy didn't even give me a price... he just told me it'd be a lot cheaper to get it done at a muffler shop. So I called a muffler shop and got a price of less than $200. Needless to say...... that's where I'm headed.
#9 of 19 Re: Grand Am Hesitation [dave4825] by dave4825 Dec 28, 2007 (4:45 pm)
Replying to: dave4825 (Oct 08, 2007 4:08 am) Thought I'd do an update on this...had the oil changed at wal mart and noticed they now do fuel injector cleaning for $20 - I asked - this is more than putting a bottle of stuff in the gas tank right???, and they said yes, it's primarily cleaning under the hood...car has run fine ever since I had this done! Clean injectors (supposedly) without the $90 hard sell the scam shops try to pull on you.
#10 of 19 the EGR valve by tomnguyen Jan 05, 2008 (4:27 am)
My car is Pontiac Grand-am 96, v6. Maybe I have a problem with the EGR valve. Where is the EGR valve in my car ? How can I clean it?    Thanks

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