1992 Mitsubishi 3000GT Hard to start when warm

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.

7 Replies

KHLOW2008

MECHANIC
41,815 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

SCYTHE13

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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

KHLOW2008

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41,815 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

SCYTHE13

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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

KHLOW2008

MECHANIC
41,815 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.