Hi all,
Question A.
My car runs good but it idles around 1200 rpm after the car has been fully warmed up.
I would like to adjust the base idle speed and idle mixture.
Do I have complete list of things to do before I make any adjustment? Any advice would be appreciated.
I have never done it before and I am just getting ready by reading our FAQ/Bentley manual.
Thank you as always.
1. air intake; check/replace air filter/air thermostat look for air leak
2. tune up; spark plugs, wire, cap and rotor
3. battery charge and fuel injection relay (Is this fuel pump relay? The white relay by the front passenger foot)
4. Check fuel supply
5. Check and clean MAF, Idle control motor and throttle body valve
6. Check O2 sensor
7. Check ignition timing
Question B.
With the battery disconnected, I am getting the following reading.
MAF platinumm wire resistance / 2.7 ohms
Idle mixture potentiometer resistance / .389 ohms
I turn the screw half turn, it changes to 389 ohms. The value does not move through the entire range. The value jumps up and down rather... Do I need a new MAF prior to my baseline idle speed/ idle mixture? The manual says it should be around 3.5-4.0 ohms. Oh, yes. I almost forgot. There is a hiccup as the engine rpm comes down to idle.
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