Mechanics

BUICK LESABRE SPARK PROBLEM

1997 Buick Lesabre • 101,000 miles

Car was running and just stopped. Cranks over but won't start. Put in new fuel pump and filter. Have fuel pressure and spark on plug. No codes do to battery going dead. Checked all fuses.
Whats next?
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Mstraddeck
January 8, 2013.



Use a gage and check fuel pressure. Did you visually check for spark at the plugs, engine cranking? Did you check for spark at more than one spark plug, engine cranking? Engine cranking, do you have injector pulse? What about security system?

JDL
Jan 8, 2013.
Used the pressure tester from Auto-Zone for the new fuel pump. Tested only one plug. Engine cranks. How do you check injector pulse? Do not think it is security system since it was running and the just stopped.

Tiny
Mstraddeck
Jan 8, 2013.
If your system lost battery voltage, it could have went into theft lock? You could use a noid lite to check fuel injector pulse. The autostore sells noid lites. You could probably use an led testlite between voltage and ground at the injector electrical connector.

JDL
Jan 8, 2013.
Car stopped running on the freeway. Pulled over and it turned over but did not start. Going to get test light.

Tiny
Mstraddeck
Jan 8, 2013.
Noid light came on and the second spark plug is working. How bright should the spark be? I could see the spark but it was not very bright. This was during the day.

Tiny
Mstraddeck
Jan 8, 2013.
The noid lite should pulse.

JDL
Jan 9, 2013.
The light turned on and off as the car cranked over.

Tiny
Mstraddeck
Jan 9, 2013.
Some possibilities, contaminated fuel-- Issue with tps sensor or circuit-- Egr system-- check coolant temp sensor--- restricted exhaust--- check idle air system and check for vacuum leak--- check map and maf where applicable--- check pcv system--- Do a compression test, if you haven't already.

JDL
Jan 9, 2013.