My car cranks and runs for 2 seconds, then shuts itself back off. What might be the problem?

10

Asked by Mar 02, 2014 at 03:09 PM about the 2000 Buick LeSabre Custom Sedan FWD

Question type: Maintenance & Repair

I've replaced alternator, mass airflow
sensor, and pcm. It all started when
the alternator went out. Replaced it
the drove it bout 30 miles the it shut
itself off, well killed the engine.  Still
had accessories power. Try to crank it
and it shut itself back off. Put a code
scanner on it and it was saying mass
airflow sensor, replaced it. Reset the
code. It went about 5 miles and shut
itself down again.  Checked it again, it
said the same.  Before I took that part
back we checked fuel pressure, it was
at 50psi, checked coils, coil plate, and
wires,all of which was replaced bout
3 mths ago. Another friend of mine
said it might be the security system
so we checked and reset it. He
confered with one of his friends and
they said it was the pcm, so I
replaced it and went through the
whole security setup again.  Car is
still doing the same.  Cranks, runs for
bout 2 sec then shuts the engine
down.  Any help would be greatly
appreciated.

7 Answers

120,925

Did you buy an oem mass air flow sensor or a cheap one on line? I have got bad ones before.

1 people found this helpful.
10

I got a new one from O'Reillys, with lifetime warranty, took it back and got another just like it. Not the rebuilt

120,925

Oh ok that's good. Will it stay running if you feather the gas pedal?

5 people found this helpful.
10

No effect

1 people found this helpful.

im having same problem with my 92 cadillac i pull up code and it says mass air flow sensor shorted so im thinking thats whats wrong with your car shorted in the sensor wires

10

fuel pump?

1 people found this helpful.
10

I've got a 1998 Buick Regal and it's doing the same thing,but before that it was running fine,I was at Advance Auto parts for some Exaust putty and when I got back in the car it started rite up as usual the Leaving the parking lot it started puut put put went about a quarter of a mile and Stalled,I tried starting it again all I got was Cranking but not turning over,put New Plugs New Wire's New fuel filter New coolent Temperature sensor, when I took the radiator hose off there was no antifreeze coming out of it,I've changed them hoses before, there's always been antifreeze in them so I'm confused why there wasn't any.but I also Cleaned My Trottle body and that's when It started turning over but only for about 3 seconds,then it cranks but doesn't turn over then when it sits for about an hour and I try it,it turns over for about 3 Second's.SMH IM LOST.

1 people found this helpful.

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