tools/meters needed to trouble shoot idle?

[WORLDCITIZEN]

Alright so I know I have posted about solving my idle so I wont bother with that again. Ive been trying to do as much research as I can and know the bentley manual would be very helpful. I dont know too much about names of parts/tools required but have noticed a lot of people talk about measuring voltage for different things like: TPS, ICV, etc. Can Anyone clarify/suggest what tools Ill need to diagnose my idle issue. Valves have been adjusted, ICM joints have been resoldered, smoke test passed. Replaced: ICM, hoses, AFM. The previous owner had a note to a shop saying the idle problem started after the clutch was replaced.

[JIM1inWisconsin]

idle

Not sure what the nature of your problem is but my last two E30's had a low idle problem cured when I put in an upgraded Mark D. chip. Idle went from 500 to 700. You can research the reason for this.

[WORLDCITIZEN]

Not sure what the nature of your problem is but my last two E30's had a low idle problem cured when I put in an upgraded Mark D. chip. Idle went from 500 to 700. You can research the reason for this.

its a high idle that surges(drops off then revs back up)

[tomstin]

its a high idle that surges(drops off then revs back up)

Sounds like Idle Control Valve to me. One of the better explanations / trouble shooting guide I have found is here:

http://www.verrill.com/car/e30_idlefaq.shtml

[dnguyen1963]

Alright so I know I have posted about solving my idle so I wont bother with that again. Ive been trying to do as much research as I can and know the bentley manual would be very helpful. I dont know too much about names of parts/tools required but have noticed a lot of people talk about measuring voltage for different things like: TPS, ICV, etc. Can Anyone clarify/suggest what tools Ill need to diagnose my idle issue. Valves have been adjusted, ICM joints have been resoldered, smoke test passed. Replaced: ICM, hoses, AFM. The previous owner had a note to a shop saying the idle problem started after the clutch was replaced.

One of these?

http://www.ebay.com/itm/Craftsman-Digital-Multimeter-Volt-AC-DC-Tester-Meter-Voltmeter-Ohmeter-34-82141-/291498430984

[101]

^^^ A simple multimeter, a test light and two fused jumper wires are all that I've ever needed to do the complete diagnostics.