Hi
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I have a strange problem with my MR2 Turbo.
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It all started last summer when in very warm weather and when engine was warm the car started hesitating and jerking between 2500
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- 3000 RPM no matter in which gear it was.
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I couldn' find the fault.
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I bought new ignition coil, HT leads,
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spark plugs and cleaned the distributor cap and AFM, unfortunately the fault persisted.
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I used the car several times in this winter when the temperatures were freezing cold and it ran flawles, no hesitation or jerking.
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Only thing I noticed in winter was that the battery and catalytic converter dash lights camer intermittently came on and faded later on.
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I took the car for a ride today and it started again with those problem in warm weather.
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Car was running fine today till it warmed up, after 20 minutes drive it started hesitating at 3000 RPM, when it hit over 3000 RPM it ran fine again.
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After next 15 minutes it started jerking and after that running like a diesel engine till about 3000 RPM, as soon as it hit over 3000 RPM it ran fine again.
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Note that it does that only when engine is warm and in warm weather.
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I think it must be some faulty sensor that is causing this.
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