My 1999 S430 has 145k miles on it. Doing a re seal on the engine since it was coming out for rear main seal anyway.
Part of that was to split and clean the intake manifold which had alot of old baked on gummy carbon all through it:
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This took alot of effort to clean up but ready to re-assemble now:
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This had got me thinking.... do I really want my engine injesting its own vomit and gumming up again?
My 1999 has a pretty simple Emmissions setup. No air pump etc on front of the motor that is all blank. I was thinking of just blocking the EGR pipe now that feeds into the rear of the intake manifold and leave all connected so the car shouldn't know any different(?)
Or will it detect a difference from what MAF or 02 readings it expects to see when EGR is activated? In which case maybe it cannot be easily defeated? Or code the EGR out?
Ir appears counter intuitive but I have read the exhaust gas coming into the manifold cools the Combustion cycle. And that when activated the car uses less fuel since duty cycle will be top when on motorway etc.
Any reason why this is a particulary bad idea besides possible reduction in fuel economy? The main reason I am thinking about it is to have the engine burning clean air instead of part exhaust gases / carbon which clearly builds up in them over time. But maybe it will take years to get bad again.....
Part of that was to split and clean the intake manifold which had alot of old baked on gummy carbon all through it:
This took alot of effort to clean up but ready to re-assemble now:
This had got me thinking.... do I really want my engine injesting its own vomit and gumming up again?
My 1999 has a pretty simple Emmissions setup. No air pump etc on front of the motor that is all blank. I was thinking of just blocking the EGR pipe now that feeds into the rear of the intake manifold and leave all connected so the car shouldn't know any different(?)
Or will it detect a difference from what MAF or 02 readings it expects to see when EGR is activated? In which case maybe it cannot be easily defeated? Or code the EGR out?
Ir appears counter intuitive but I have read the exhaust gas coming into the manifold cools the Combustion cycle. And that when activated the car uses less fuel since duty cycle will be top when on motorway etc.
Any reason why this is a particulary bad idea besides possible reduction in fuel economy? The main reason I am thinking about it is to have the engine burning clean air instead of part exhaust gases / carbon which clearly builds up in them over time. But maybe it will take years to get bad again.....
