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I have a 1992 3000GT and it runs great

Tiny
HVACMAN24
  • MEMBER
  • 1992 MITSUBISHI 3000GT
  • 200,000 MILES
I have a 1992 3000gt and it runs great. It loses fire, dies, and wont crank up until it wants too, usually a few minutes, then it will fire on all 6. Sometimes it will run days befor it does it again, usually just 20-30 minutes an it cuts back off, with no spark. What could be the MOST LIKELY cause?
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Friday, November 9th, 2012 AT 9:16 AM

7 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
A bad crank sensor. Did you check for trouble codes?
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Friday, November 9th, 2012 AT 11:28 AM
Tiny
HVACMAN24
  • MEMBER
  • 4 POSTS
It cranked an ran fine alllll day everywhere I went, cranked back no probs, this morn, no go. No cel for 5 secs when inserting the key an powering up, also no spark. These two tbings seem to happen together. Ecu maybe? Mfi relay, help lol !
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Sunday, November 11th, 2012 AT 12:33 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Have you checked for trouble codes?
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Monday, November 12th, 2012 AT 1:07 PM
Tiny
HVACMAN24
  • MEMBER
  • 4 POSTS
Well, when I turn the key over, if the cel light comes on for the 5 secs, an goes out, then it starts an runs fine, no lights, no codes. Alot I turn the key no cel light at all, an no spark. Oh, an no code.
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Thursday, November 15th, 2012 AT 5:53 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Such symptoms usualy indicates a faulty ECU. Remove the ECU and take off the cover to inspect the circuit board. If you see signs of leaking capacitors, that would be the cause of it.
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Thursday, November 15th, 2012 AT 5:04 PM
Tiny
HVACMAN24
  • MEMBER
  • 4 POSTS
Thank you, I have did that, looks brand new, I will try to find a known working ecu, an see what happens. Been in the shop two days an they cant get it to glitch :/ so ill keep updated,
Thank you
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Thursday, November 15th, 2012 AT 5:10 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Looks can be deceiving as this is not a normal fault due to damage. It could be due to bad soldered joints. Look carefully at soldered joints and if you any that might look like the solder is cracked, try resoldering them and retest.
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Thursday, November 15th, 2012 AT 5:17 PM

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