03 BUICK LESABRE HARD STARTING AFTER REFUELING. ENGINE DIES WHEN GAS CAP REMOVED

SOURCE: 1999 Buick LeSabre Power Steering

next to firewall below the alternator

SOURCE: When i start the car

could be the O2 sensors

Marvin

• 85242 Answers
• Posted on May 20, 2009

SOURCE: car dying when letting off gas

try this it might cure the problem. works for me most of the time.

Here is the common cause of surges, 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, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, 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.

SOURCE: air conditioner problems on 03 buick lesabre

located on the line

SOURCE: trani shifts hard

change trans fluid and filter