12-28-2004, 05:11 PM
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#1
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AF Newbie
Join Date: Dec 2004
Location: albany, Wisconsin
Posts: 5
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1999 Grand Prix chugs going up hills
My wife's 1999 Grand Prix GT 3.8 chugs when under load like when you go up a steep hill or sometimes when you get on it. She had me drive it and when it started to chug I got on it and then the check engine light came on. Any ideas???
Thanks, Steve
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12-30-2004, 10:32 AM
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#2
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AF Newbie
Join Date: Sep 2004
Location: Brantford
Posts: 45
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does the chugging go away when you lightly press the brake?
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12-30-2004, 10:43 AM
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#3
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AF Enthusiast
Join Date: Dec 2004
Location: E Lansing, Michigan
Posts: 240
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Re: 1999 Grand Prix chugs going up hills
hard to say, has to be a liquid not circulating properly due to being unlevel.
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12-30-2004, 12:52 PM
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#4
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AF Newbie
Join Date: Sep 2004
Location: Brantford
Posts: 45
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It is not always the tranny. One guy had that problem and it turned out to be intake gasket. Mine is doing that too but when I press on the brake it stops chugging which means it is related to the lock up converter. When I get my scanner, I'm going to find out if the computer is telling the lock-up converter to engage/disengage or if it is in the tranny.
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12-31-2004, 02:37 PM
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#5
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AF Newbie
Join Date: Dec 2004
Location: albany, Wisconsin
Posts: 5
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It has not done it again since I replaced the plugs and wires so my wife has not had a chance to try out the brake trick. Still I doubt that plugs and wires were the problem. I had a Sunbird that the lock up went out on and I ended up just disconnecting the wires to it. Do you think that could be the problem with this?
Thanks, Steve
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01-14-2005, 05:34 PM
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#6
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AF Regular
Join Date: Jan 2005
Location: toronto
Posts: 463
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drjimmy: My grand prix 1999 does the same thing have you found a fix for it yet?
I just touch the brakes and it goes away.
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01-14-2005, 07:28 PM
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#7
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AF Newbie
Join Date: Jan 2005
Location: Cleveland, Ohio
Posts: 20
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Re: 1999 Grand Prix chugs going up hills
A long time ago that happend to me on a 92 buick century, changed the plugs and wires and it was fine after that!
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01-15-2005, 06:15 PM
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#8
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AF Newbie
Join Date: Jun 2004
Location: dorchester
Posts: 13
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Re: Re: 1999 Grand Prix chugs going up hills
same problem on my 99 grand prix. Bad plug wire.
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01-16-2005, 11:17 AM
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#9
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AF Regular
Join Date: Jan 2005
Location: toronto
Posts: 463
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Quote: same problem on my 99 grand prix. Bad plug wire.
I've had it on a scope twice wouldn't this show up?
And I don't understand the tap the brake lightly and it goes away part.
the car 1999GPT runs fine most the time until its under load(going up Hills mostly) and it starts, if you touch the brake light or hammer down on the gas its goes away.
The PO is that I've had it in twice and they tell me nothings wrong.
Whats a good set of wires to use? Last time I did wires on my older GP the mechanic told me not to use wire made by Cheap Charlie.
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01-17-2005, 12:25 PM
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#10
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AF Newbie
Join Date: Jan 2005
Location: Sheppton, Pennsylvania
Posts: 4
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Re: 1999 Grand Prix chugs going up hills
Quote:
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Originally Posted by steve53502
It has not done it again since I replaced the plugs and wires so my wife has not had a chance to try out the brake trick. Still I doubt that plugs and wires were the problem. I had a Sunbird that the lock up went out on and I ended up just disconnecting the wires to it. Do you think that could be the problem with this?
Thanks, Steve
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What engine is in it? Mine is a 3.1 Only acts up when going up hill as if it's the fuel pump but isn't the fuel pump. Hooked it up to the fuel pressure gauge & it's giving the right reading of pressure. I am stumped.
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01-17-2005, 02:40 PM
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#11
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AF Newbie
Join Date: Dec 2004
Location: albany, Wisconsin
Posts: 5
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The motor in our car was the 3.8 (not super charged). It has not done it again since I replaced the plugs and wires. As far as the brake tap thing goes, maybe it has something to do with the torque converter lock up solenoid ???
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01-17-2005, 09:07 PM
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#12
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AF Newbie
Join Date: Jan 2005
Location: pulaski, New York
Posts: 10
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Re: 1999 Grand Prix chugs going up hills
i have recently bought a 99 grandprix and it tends to chug going uphill but it also does it going down the road at around 2000 to 2750 rpm, changed plugs and wires and it did not help, i think mine is fuel related some throtle sensor, but not shure any ideas would be nice
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01-17-2005, 09:15 PM
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#13
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AF -Advisor
Join Date: Jul 2004
Location: >>>>, South Dakota
Posts: 1,140
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Re: 1999 Grand Prix chugs going up hills
dont say the tranny is bad before you completely rule out a engine miss tapping the brake is unlocking the torque converter and letting the engine miss be absorbed. when the torque converter is locked up its like having a solid connection every engine miss will be felt
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01-17-2005, 09:44 PM
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#14
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AF Enthusiast
Join Date: Jul 2003
Location: Fort Worth, Texas
Posts: 1,207
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Re: 1999 Grand Prix chugs going up hills
Probably just the torque convertor. When going up hills the convertor probably starts out locked and then when you give it just enough gas to get up the hill its locking/unlocking.
Surprised no one has said to go get the car scanned. If it threw a SES then go find out what code it is.
__________________
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01-18-2005, 07:05 AM
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#15
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AF Newbie
Join Date: Jan 2005
Location: pulaski, New York
Posts: 10
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Re: 1999 Grand Prix chugs going up hills
my cars service light or check engine light has not come on but because i have only owned it for 18 days i might check it and c if it went off before i bought it. i will check out the torque converter
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