1997 Mitsubishi Magna wont start sometimes

Tiny
SMAEDLEY65
  • MEMBER
  • 1997 MITSUBISHI MAGNA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 170,000 MILES
Engine turns over but wont fire, hot or cold doesn't seem to matter, my mechanic was told it was earthing problem, he cleaned all earths from body to engine and elswhere, didn't do it for three months and then did it again the other day. Left it over night and it started next morning, drove it one km and turned it off, ten minutes later it wouldn't start again, left it 4 hrs and it started and hasn't had a problem in the two weeks since. Any thoughts
Wednesday, August 4th, 2010 AT 10:55 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If it refuses to start don't wait for nothing- do below to find out if its fuel or spark problem that's causing it not to start-something has to give.

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing.
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Wednesday, August 4th, 2010 AT 11:55 PM

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