smoking diesel exhaust
I need advice from some of you diesel experts. I have a cummins ISB 300 horse with 115,000 miles. Beginning 2 years ago when I accelerated away from a stop sign it would puff out some black smoke. ...
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Our Cat has always done itit'saC7 and when you hit the throttle in goes more fuel.
A diesel does not mix fuel and air and go through throttle blades. It breathe in as much air as it can handle all the time. Hit the throttle and lot more fuel and black smoke. Newer diesels don't have the response of the old because emissions dictated tuning. The Volvo engines are a good/worse example. Low and slow response and power throughout the range and mileage is worse and have lots of engie fires.. Tuners spew more at take off and hot rod diesel engines rely spew the smoke as cam and injector timing is increased and more fuel is sprayed in when you hit the throttle and really gets going when the turbo(s)spool up.
When injector pumps go bad in diesels you will smell and possibly see gray smoke actually raw diesel and smell and raw diesel though the exhaust.
haven't seen in my case any MHs spewing a lot of black smoke even with a tuner.
The turbo could be getting bad...and not compressing enough air for the amount f fuel sprayed in would be the only thing I can think of at the moment.
Hard to hear in a running diesel but a stethascope on the turbo might reveal bearing problems etc. Not cheap but what s on a diesel,a Cummins Dealer or other shop hooked up to the computer, unless yours is pure mechanical diesel, can sort it out pretty quick.I don't think I want to crawl around on our engine and side radiators probably still would have to go through the bed room.A Diesel mechanic knows his brad and others real well.
A diesel does not mix fuel and air and go through throttle blades. It breathe in as much air as it can handle all the time. Hit the throttle and lot more fuel and black smoke. Newer diesels don't have the response of the old because emissions dictated tuning. The Volvo engines are a good/worse example. Low and slow response and power throughout the range and mileage is worse and have lots of engie fires.. Tuners spew more at take off and hot rod diesel engines rely spew the smoke as cam and injector timing is increased and more fuel is sprayed in when you hit the throttle and really gets going when the turbo(s)spool up.
When injector pumps go bad in diesels you will smell and possibly see gray smoke actually raw diesel and smell and raw diesel though the exhaust.
haven't seen in my case any MHs spewing a lot of black smoke even with a tuner.
The turbo could be getting bad...and not compressing enough air for the amount f fuel sprayed in would be the only thing I can think of at the moment.
Hard to hear in a running diesel but a stethascope on the turbo might reveal bearing problems etc. Not cheap but what s on a diesel,a Cummins Dealer or other shop hooked up to the computer, unless yours is pure mechanical diesel, can sort it out pretty quick.I don't think I want to crawl around on our engine and side radiators probably still would have to go through the bed room.A Diesel mechanic knows his brad and others real well.
