Quote:
Originally Posted by Tomguy
The MAP and ECU screws are opposite.
Turn the MAP CCW to richen, CW to lean.
Turn the ECU screw CCW to lean, CW to richen.
The ECU screw won't have any effect on idle mix unless your TPIS is adjusted right.
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Quote:
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Originally Posted by BWOSTOSH
Map sensor, unscrew = cclw (when facing screw) will lean the whole system all rpm ranges
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Maybe it depends on how we look at the MPS screw, but don't the above posts contradict each other?
By the way Tomguy - I have carefully adjusted the throttle idle switch. I had not realized how sensitive this is. I suspect many D-Jets are running without the idle switch closing. At idle, the injectors see vacuum on one side, so differential is something like 39 psig while when throttle plate is open differential is 30 psig. Presumably ECU adjusts injector pulses to account for this?
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Graham
85 300D
,72 350SL, 98 E320, Outback 2.5