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Sedans Pontiac Grand Prix Pontiac Grand Prix - 2005 and earlier
4431 messages, Last post on Nov 30, 2009 at 7:07 AM
You are in the Pontiac Grand Prix Forum. Your Hosts are pat & karens
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Replying to: dziegiel (Jul 03, 2001 6:49 am) |
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| I have no idea how to explain this one. It started shortly after I got the car in 2004 but only occurred at one specific time when I was backing out my drive. Now it's happening a lot more. What it is is this: Originally when I started my car, put it in reverse and started backing out the drive, something in the front of the car (engine, brakes, steering, ???) makes a kind of humming/grunting noise that vibrates slightly, lasting a few seconds. Now it happens more often but intermittently when I break, am steering into a turn, or sometimes just driving straight down the road. It's loud enough people can hear it and stare. I don't know if this is connected, but sometimes my low track light will come on for no reason. This has happened maybe 3 or 4 times when there is no reason for it to come on, such as starting to back down my paved, even driveway. I tried driving with the track off, but it had no affect on that strange noise. Any ideas? | |
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Replying to: grprixluvrgal (Oct 01, 2007 10:17 am) Clark
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Replying to: cnw (Oct 07, 2007 5:26 pm) I did, however, take my car in to have the tires rotated and Belle Tire told me I needed a new right front hub assembly. Could this contribute to the problem at all? The vibration and noise is getting so frequent now it happens more time than not. Thanks for the info and I will check the brake fluid level when I get home tonight.
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Replying to: grprixluvrgal (Oct 16, 2007 8:07 am) |
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Replying to: chambo1 (Jul 12, 2006 10:32 am) My starting problem was cause by the mass flow air sensor starting to fail in the throttle body (manifold). If the computer detect decreasing air flow it tries to compensate by decreasing fuel delivery and when sensor completely fails the computer stops fuel delivery completely. I hope this helps, I've been where you're at and it ain't no fun. John |
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Replying to: grprixluvrgal (Oct 01, 2007 10:17 am) Thanks, Christi |
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Replying to: chriistii (Nov 26, 2007 8:54 am) I am having the same exact problem on my 04 GP as well. And this morning my ABS and Traction System lights came on. I have also had a couple of instances where the same "humming/vibrating" noise would happen pulling into a parking space while turning to the right, 
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| I have an 05 Grand prix that just failed its inspection due to a P0411 code that came up in the emissions test. I was told by the dealer over the phone that its a secondary air injection check valve that need to be replaced at a cost of $300 for just the part!! Are there any other cheaper options it might be? Is the dealer blowing smoke up my butt? | |
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I noticed about three months ago my tac on the console would drop to 0 and stay there while the car was still running. Once you stopped and started the car it would work fine. Then the past two weeks I have had issues with the car not starting right away. It will turn over but not start and if you wait some time it will start for you. Also it has stalled on me about 3 times this week. After reading this I think I am looking at the CrankShaft sensor. IS there anything else I should look at based on your past experiences? Thanks, |
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