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The emissions system has two tasks - make sure the engine is hot enough to burn all the ingested fuel, so it doesn't emit unburned hydrocarbons, and make sure the engine is not too hot, so it doesn't emit oxides of noxious.
If you look in the dictionary under oxymoron, that's a picture of your intelligent emissions system.
ECM determines suitability of emissions emission by monitoring AAT, IAT, ECT, transmission temperature, and engine rpm in order to maintain engine operation within a range designed to promote lowest pollution, while still allowing the vehicle to proceed in a timely manner - the engineers are stuck between a rock and a hard place because traffic speeds with cold engine is excessive unburned hydrocarbon emissions, but idle is even worst emissions level and zero fuel economy, to boot.
That, and the thought of millions of irate soccer-moms returning 'instantly undriveable' vehicles for full refund, is why you get what you got
ECM will always take the hardest path to emissions nirvana, driveability and customer satisfaction notwithstanding.
Either that, or it's gremlins..........................
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'05 CRD Limited
Pricol EGT, Boost
GDE Hot '11; EDGE Trail switched
SEGR; Provent; Magnaflow;
Suncoast T\C, Transgo Tow'n'Go switch;
Cummins LP module, Fleetguard filter, Filterminder
2.5" Daystar f, OME r; Ranchos; K80767's, Al's lifted uppers
Rubicons, 2.55 Goodyears
Four in a row really makes it go
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