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1991 190e 2.6 automatic
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760 Posts
Discussion Starter #1
Does anybody know how a m103 without EGR controls the high nox emissions without the EGR? Does the computer retard the timing at a certain point?

i know the earlier m103s have 2 pre cats and one cat while the EGR has no precats and one cat but with a egr

but how does the non egr m103 cool the air mixture without the egr?
 

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'87 190E 2.3 Manual, '81 500SEL 4whl SLS, '91 300SEL
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1,757 Posts
Does anybody know how a m103 without EGR controls the high nox emissions without the EGR? Does the computer retard the timing at a certain point?

i know the earlier m103s have 2 pre cats and one cat while the EGR has no precats and one cat but with a egr

but how does the non egr m103 cool the air mixture without the egr?
For reference, the pre-cats are basically just a wire mesh that appear to be designed to catch particulate. Nothing looks particularly special about them.
 

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Registered
1991 190e 2.6 automatic
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760 Posts
Discussion Starter #3
For reference, the pre-cats are basically just a wire mesh that appear to be designed to catch particulate. Nothing looks particularly special about them.
so it has no catalytic compound in there??

but yeah, i still wanna know what is in place of the EGR

ignition timing or?

that means the ecus wont work form 87 to a 91 since it would have different code?
 
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