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1999 trooper: start on 2/3 cylinders..throttle..As it warms..runs well…

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I have a 1999 Trooper...
I have a 1999 Trooper 3.0d auto. When the engine is cold it will start on 2/3 cylinders and has nil response from the throttle. As it warms up it runs well but seems dowm on power. No fault codes are stored and no engine management lights are on or have been on. The car has a full Isuzy service history and has covered 34000 miles
Submitted: 8 years ago.Category: Car
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Answered in 1 day by:
7/1/2010
Auto Mechanic: Tom, ASE Certified Technician replied 8 years ago
Tom
Tom, ASE Certified Technician
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Has a compression test been done?
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Customer reply replied 8 years ago
Yes and was all good, oil changed for correct grade, injectors replaced under Isuzu warranty 18 months ago, Suspect oil pressure switch to be changed next.
Auto Mechanic: Tom, ASE Certified Technician replied 8 years ago
Oil pressure would be the next issue . Also they need to check the glow plugs a fault glow plug will cause this .These are the next steps.
Tom
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Customer reply replied 8 years ago
Oil pressure switch fixed the problem. Thank you.
Auto Mechanic: Tom, ASE Certified Technician replied 8 years ago
Anytime .

Positive feedback and bonuses greatly appreciated.
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