Question about 2003 Buick Park Avenue

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Speed Control Problems - Cruise Dropout, Rough Shifting, Engine Cutoff

My 2003 Park Avenue has several problems: drops out of cruise, rough shifting, erratic speedometer, engine quits, usually down hill or downhill and around a curve such as on an exit ramp. Had new transmission speed control, new computer, computer ground terminal cleaned, etc. Buick dealer couldn't diagnose. Suggestions? Many thanks.

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  • Contributor
  • 16 Answers

Maybe start with the fuel filter or pump. possible screen collapsed or plugged.

Posted on Jul 18, 2013

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Posted on Jan 02, 2017

81vasquez
  • 34 Answers

SOURCE: where is the cruise control fuse on the 1991 park avenue

there is a fuse panel under the hood as well as under the steering wheel check that one

Posted on Jun 06, 2009

Molson02536
  • 3854 Answers

SOURCE: fixed check engine trouble code but light with same code comes on

Your transmission problem could be related to the TPS sensor. The TPS sensor indicated to the PCM when and what gear the transmission should be in. As for the Lucas and other additives to the transmission may be doing it more harm then good, As the transmission oil is thicker, the transmission line pressure increases. The PCM try's to compensate for that by letting the converter lock up clutch to slip and the fluid retention in the solenoid to change gears stick causing it to shudder between gear shifts. Recap, Check the TPS sensor readings and the Wire Harness. Look for loose connections and corrosion that may not be giving the proper readings to the ECM. Rescan the car for any DTC codes and most transmission chop can do that for you if your going to get it serviced there anyways. Have the transmission fluid flushed and filter changed, and have them do a transmission line pressure checked, there are additives out there to keep the fluid from foaming which is ok, but changing the fluid's weigh can cause transmission failure. Good luck and hope this helps and keep me posted, be glad to help.

Posted on Jun 14, 2009

emissionwiz
  • 74945 Answers

SOURCE: Replaced IAC valve on a 1999 buick lesabre, car is

a defective TPS will affect shifting replace that 1st

Posted on Aug 28, 2009

emissionwiz
  • 74945 Answers

SOURCE: I have a 1991 Buick Park Avenue. Runs rough in

Here are the common cause of surges, cold stalls, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours.
To correct this problem I want you to get a can of intake cleaner (ABOUT $5.00) from any local auto parts store like NAPA or Carquest, do not use carburetor spray, intake cleaner only or u will damage the Teflon coating inside the throttle valve and air bypass valve, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Posted on May 25, 2010

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wilsodfarm
  • 986 Answers

SOURCE: I'm trying to find the fuse for the cruise control

theres not one

Posted on Aug 23, 2010

Testimonial: "Thank you for your help. "

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