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Didn't read everything you guys wrote here but... my car has no DPF (pre LCI) and smoked like a chimney when I bought it. But after I cleaned out the manifold and did the EGR delete the soot level went down by like 95%. Only a tiny puff when reved while parked in neutral. A bit more when floored while being driven but nowhere near what it used to be.
So I'm just thinking isn't an EGR delete good for keeping the DPFs from clogging?
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