2000 Chevy Impala

20impala00 · Posted at Tue Oct 28, 2008 4:52 pm

Engine Mechanical problem
2000 Chevy Impala 6 cyl Front Wheel Drive Automatic 128000 miles

my wife was driving home car sputtered for a second then shut off, vehicle starts but will not stay on, unless you give it some gas, if you manage to get it running it runs rough. my guess is the fuel filter. vehicle has almost new battery, recent oil, also radiato flush, and trans flush with 10k miles. any advice is greatly appriciated.

mastertechtim · Posted at Tue Oct 28, 2008 4:57 pm

not fuel filter, i would imagine its a faulty ignition coil or ignition system breakdown. you can try removing spark plug wires at the coil towers one at a time and see if one coil has no spark output. hope this helps

20impala00 · Posted at Sat Nov 08, 2008 4:11 pm

i have replaced all 3 ignition coils, spak plugs and wires, and now the fuel filter. car turns on but starts to run rough skanner code p0172 : system to rich(bank 1). checked under the hood because car shut off on its own plug wire #1,#3, and #5 are hot to the touch, #3 more than the rest, and #2,#4, and #6 are normal. what can i do to correct this.

mastertechtim · Posted at Sun Nov 09, 2008 3:30 am

remove the fuel pressure regulator vacuum hose on the fuel rail i bet you have gas in it. sounds like the diaphram has ruptured causing raw fuel to enter the vacuum line causing the rich condition.

20impala00 · Posted at Thu Nov 13, 2008 5:49 pm

decided to change fuel pressure regulator but still not resolved, check engine light came on, scanned, code is P0300 (random/ multiple cylinder misfire detected.

mastertechtim · Posted at Fri Nov 14, 2008 12:30 pm

im at a loss on this one. it seems like you covered all most common areas. maybe install fuel pressure gauge and actually watch fuel pressure. also check coolant temp sensor on the wscan tool and make sure its not reading too cold, for example if the temp sensor is reading -40 degrees then the computer will compensaate and make vehicle run rich.

20impala00 · Posted at Thu Nov 20, 2008 8:45 am

tried all possible options with no luck, finally took to repair shop had diagnostic test, result was bad mass air flow sensor. this was a learning experience for me hopefully for you as well. thank you for your insight on this problem.

chevy bound · Posted at Sun Dec 07, 2008 4:55 pm

before I trade my car in - was your eventual fix expensive?

mastertechtim · Posted at Mon Dec 08, 2008 4:22 am

a mass air flow sensor is about 100 dollars