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--- articles:cis-e_fuel_adjustment [2021/09/07 05:47] – [Adjusting EHA Valve] john5788
+++ articles:cis-e_fuel_adjustment [2021/12/04 03:51] (current) – [Adjusting EHA Valve] john5788
@@ Line 34: / Line 34: @@
 At this point, the control unit should be in the diagnostic mode for outputting the fuel trim as an on/off ratio. After this, when the engine is started, the CHECK ENGINE LIGHT should be illuminated.
-==== Notes and Exceptions ====
+**Note:** Some ECUs do not require being put into a diagnostic mode and will begin outputting a duty cycle reading after 30 seconds of idle time after the engine has been started.
-  * 1986 190E 2.3-16 - This ECU does not need to be switched into a special mode. The on/off ratio will be available after the engine has been running for 30 seconds.
-  * 1993 190E 2.6 - This ECU does not need to be switched into a special mode. The on/off ratio will be available after the engine has been running for 30 seconds.
 ===== Reading the on/off ratio =====
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 ==== Adjusting EHA Valve ====
 <grid>
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   - Remove EHA valve from fuel distributor
     - Unplug wire connector
-    - Remove 2 screws holding EHA valve to fuel distributor while covering the EHA valve with a rag to catch fuel that will squirt in your face
+    - Remove 2 screws holding EHA valve to fuel distributor while covering the EHA valve with a rag to catch fuel that will squirt at your face
     - Pull EHA valve off fuel distributor, noting the 2 green rubber sealing rings.
   - Remove the screw cover with a flathead screw driver
@@ Line 97: / Line 93: @@
 {{ articles:eha_valve_seals.png?300 }}
 <caption>EHA valve seals</caption>
+</thumbnail>
+</col>
+<col sm="6">
+<thumbnail>
+{{ articles:eha_valve_backside.jpg?300 }}
+<caption>EHA valve screw cover</caption>
 </thumbnail>
 </col>
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 ==== Adjusting Fuel Distributor Screw ====
-If there is a steel plug  present, it needs to be drilled out first.
+If there is a steel plug  present, it needs to be drilled out first. Engine must be idling for this adjustment.
 <grid>