Question about 2003 Chrysler Concorde

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My car starts, but rattles a lot...it gets worst when I drive it...I already had the alternator rebuilt, throttle sensor cleared...could it mean that I need a new motor?

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  • Andre Farmer
    Andre Farmer Nov 27, 2013

    Hi Andre Farmer, I want to help you with your problem, but I need more information from you. Can you please add details in the comment box?

  • Andre Farmer
    Andre Farmer Nov 27, 2013

    It sounded like the belt at first, but when I drove it around it made the whole car shake. It wouldn't accelerate as much when I push on the gas pedal. It also cut off when I stopped

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Sounds like you have a bad spark plug or plugs

Posted on Nov 27, 2013

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Engine hesitates,no pressure release when gas cap removed on a 98 buick lesabre


Not sure how long ago you had the top half of the engine rebuilt and not sure if this is a new problem and the vehicle ran fine after the top end was done (thinking it was fine then). I have found a number of times that the throttle plate gets carbon deposits on it to where it doesn't close in the proper spot. This throttle body happens to have a screen in it so many people don't physically clean the deposits off and just spray cleaner in there to clean it. Below is a picture of that screen in the throttle body and I marked with a red arrow a snap ring that needs to be removed and that screen comes right out. Spray that throttle plate real well with throttle body cleaner and even manually open it so you get both sides. I even use a soft tooth brush and a rag with throttle body cleaner. Get the trottle plate and the inside of the throttle body including the little ledges that kind of stop the trottle body (you will feel a "lip" in there). After you get it all back together, disconnect the negative battery terminal for about 10 minutes and then start the car. It's gonna be a hard start at first and rev it a few times to blow the cleaner out and then just let it idle for about 5 to 10 minutes. Then maybe drive it for a few miles. Disconnecting the battery cleared how your vehicles computer (PCM) where it thought its idle was set and now is going to teach itself the best idle position. It still going to take about 25 miles and some driving time to totally learn but I think this should help clear it up. Another thing but you will need the proper scanner or somebody who can do it for you and it is called a crankshaft position system variation learn procedure. Hope this helps...

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Feb 18, 2013 | 1998 Buick LeSabre

2 Answers

Hi, yes, ... my car just started having the RPMs to go up and down while I am driving...


Yes iac valve or throttle control valve. Check for vacume leaks first.

Jun 18, 2017 | Cars & Trucks

1 Answer

Wants to stall with lite gas peddle application


You could check and clean throttle body and iac control, see if it helps? Check the throttle position sensor. Does the fuel injector spray pattern look ok?
I would want to check fuel trims, to see if running rich or lean? Any more the 02 sensor is part of a tune-up.
Do you have good engine vacuum at idle? If this a high mileage engine, I'm not sure it will ever run perfect?
I don't know litre size of engine?

Jun 27, 2017 | 1989 Chevrolet G20

1 Answer

The truck has a hesitation when starting and it rattles at the bottom end. i replace the gas cap and clean the throttle body


this rattle at the bottom end is my main concern and i would advise you to call a local mechanic and take it for a test drive ,you may need a rebuilt engine if the crank is worn but without have a listen i honestly cannot say and i will have to trust a local mechanic to give you a honest opinion

Jan 03, 2011 | 1997 Ford Explorer AWD

2 Answers

The van chokes out when you get to about 2500 rpm.it will drive,just not fast.we have replaced the mass air sensor, the o2 sensor,the throttle position sensor,the distributor(which was in very bad...


run a fuel pressure test during a drive cycle, you will need adapters to do this from the cab, if i remember you need 60 to 65 lbs pressure,

Aug 13, 2010 | 2003 Chevrolet Astro

1 Answer

Starts with acceleration once warm starts fine already changed maf sensor.


Question isn't exactly clear. If you mean that you have to press the accelerator to get the car to start, you probably need to replace the Idle AIr Control Valve (IAC). Other possible causes include a fault throttle sensor or a vacuum leak.

Dec 29, 2009 | 1997 Mercury Grand Marquis

4 Answers

PO1290 CODE


I just got one today with the same problem; both lights and code p1290 hard to start and once started stayed at idle with no accelleration . If you have already fixed it would be nice to share the info. If not already done ill tell you when i fix this one.

Sep 18, 2009 | 2003 Isuzu Rodeo

2 Answers

Alternator rebuilt tested ok still will not charge battery


hi im sorry to tell you this never ever disconnect the battery while the car is running , could cause surge which will blow the alternator at best at worst it could fry the ECU (computer) WHY would you want to disconnect battery while the engine is running or is there something im missing here?

Mar 28, 2009 | 2000 Ford Focus

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