P38A Modulation

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Datatek

Well-Known Member
Posts
45,023
Location
Near Poitiers SW France
Does anyone know how much variation in the modulation can be expected with coolant temperature? @wammers perhaps?
Maybe it's not obvious. it's a 1999 diesel with MAF & EGR.
 
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I always drive with torque running, that logs time, speed, revs, coolant temp etc every few seconds. Happy to share if it's of any use
4.0 Thor
 
Modulation is only checked engine up to temp at idle. Should be in the 45 to 55% range. It will increase as revs rise and pump internal pressure rises.
 
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