idle speed
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Posting Guru
Joined: Jun 1999
Posts: 1,083
Likes: 1
idle speed
I want to use my old tach/dwell meter (two wires, green and black) to check idle speed on my 1990 F150 SC with 4.9L I6. Now this was real easy on my 68 F100 with 240 I6, cause the coil connections were simple. How to I tap the coil on my 90 to do the same thing. When I look down at the coil from over the driver's side fender I see left wire/terminal, coil/dist. terminal, and a right terminal. Which is it right or left? And what's the easiest way to connect the meter's alligator clip? Any help appreciated.
Fleet Mechanic
Joined: Aug 2000
Posts: 1,504
Likes: 1
From: Texas
idle speed
In all truth and reality the idle seed of the computer controlled engines is controlled by the computer. You can adjust it a little bit, but not a whole lot. I have tried to adjust mine down to what it says in the books, but I cannot get the idle on mine below 1,000 or 900 sometimes.
I would say drop in a tach instrument cluster and that'll show you what your engine is running at.
1988 F-150, SWB, 5.0 EFI (formerly 4.9 EFI), M5OD 5 speed, 3.08 gears, Summit shorty truck headers, Custom built Flowmaster exhaust system. Force 4 LP6000 lightbar, Federal signal PA-300 100 watt siren, Icom IC-V100 50 watt mobile radio.
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1965 F-100 (just purchased 1/18/01), SWB, 390, C-6 auto. Dual exhaust, Not much else to do to it.
Can see both below.
[link:www.geocities.com/hotrodford_88/|Hotrodford_88's Webpage]
