1992 Mitsubishi 3000GT Hard to start when warm

Tiny
SCYTHE13
  • MEMBER
  • 1992 MITSUBISHI 3000GT
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 88,500 MILES
Hey, my problem is when starting the car. When it is cold it starts well, every time, but after I've driven it and parked up for a hour or two, and go to start it again it has a bit of trouble and I have to give it a bit of acceleration to get it going. Any ideas? Thanks.
Saturday, December 19th, 2009 AT 12:41 AM

7 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi Scythe13,

Thank you for the donation.

There are a few possible causes for such occurrences.

Does the Check Engine Lamp illuminates when engine is running?

What is the idling speed when engine is warm?

After it starts, does it stall when accelerator is released?
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Sunday, December 20th, 2009 AT 12:21 AM
Tiny
SCYTHE13
  • MEMBER
  • 4 POSTS
Hey, nope the check engine light does not come on. The idling speed is usually around 700rpm when warm, and yes occasionally if I don't keep the pedal pressed slightly it will cut out.

Cheers.
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Sunday, December 20th, 2009 AT 12:58 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
This seems to be a fault with the idling system.

Get the throttle body and Idle Control Solenoid cleaned and retest if the problem goes away.
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Sunday, December 20th, 2009 AT 3:17 AM
Tiny
SCYTHE13
  • MEMBER
  • 4 POSTS
Sorry I should just clarify that it will only cut out straight after I have tried to started it up while warm. Once it's running, it seems fine other than the idle speed seems low.
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Sunday, December 20th, 2009 AT 4:07 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
When the ISC or throttle body is irty, insufficient air would get past the throttle body resulting in the low idling. This can result in the engine stalling at initial start up as the ISC is slow to react.

Usually cleaning the components and readjusting the idling speed would resolve the problem.
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Sunday, December 20th, 2009 AT 5:50 AM
Tiny
SCYTHE13
  • MEMBER
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Thanks a lot. Will get that done and see if it comes right. Cheers.
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Monday, December 21st, 2009 AT 11:19 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You are welcomed and if you have further questions, feel free to drop by.

Merry Christmas
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Tuesday, December 22nd, 2009 AT 6:47 AM

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