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1993 Mitsubishi Diamante 1993 Mitsubishi Diamante hesitatio

Tiny
MADMARXY
  • MEMBER
  • 1993 MITSUBISHI DIAMANTE
Engine Performance problem
1993 Mitsubishi Diamante Front Wheel Drive Automatic 149000 miles

ok I have a 93 diamante I just replaced the trans and the tcu, when the car is cold and I drive it it runs perfect, after it warms up if im stopped and I go to step on the accelerator the car jerks and hesitates unless its at a certain position and if your moving and u go to step on the gas it hesitates and wont downshift right away then it goes above 50 it runs great, if u could help me out id appreciate it thanks, Ed
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Tuesday, February 17th, 2009 AT 8:22 AM

1 Reply

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

Thank you for the donation.

Was this problem the reason for the replacement of the TCU and trans assy?
Did you try to retrieve for Diagnostic Trouble Codes?

If the hesitation you mentioned is as if the vehicle is starting from 2nd speed, then you have a problem with the AT temp switch or its wiring. Check if the connectors are properly plugged in and visually inspaect terminals for corrosion, bent pins or broken wires.
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Tuesday, February 17th, 2009 AT 4:28 PM

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