Intermittent misfire after tuneup
Hi all, first time posting!
I bought a 1988 2.9 ranger. 4x4 w/ stick-shift. It initially drove OK but sounded lean.
It has 210K miles and hadn't had a tuneup in I don't know how long.
I replaced following:
Oil
Oil Filter
Spark-plugs (previous ones were corroded and required patients to remove)
- I did torque the new plugs to book spec
Wires
Distributor + Cap + Rotor
Ignition Coil
I had to remove some vacuum lines for this process and put them back. None of them seemed cracked when I put them back.
A negative wire to ignition coil broke in the tune up process and so I had to re-strip and hook that up again. This broken wire was causing no firing at all.
Now, when I start the truck it idles with an easily audible misfire and doesn't go away after accelerating just gets faster.
I've tried unplugging each plug but I can hear a change for each when unplugging so I assume wires are fine?
I used a timer light on #1 plug after installing new distributor and it seems to run as best it can when "TC" (top center) is inside the circular hole. (Sorry, I don't know the name of it)
I did read somewhere that I should have it at 10 degrees. But we tried the whole range of degrees (at least where it wouldn't stall) and all the degree marks still had the intermittent misfire.
I tried to get the new distributor + rotor as spot on to the old one as I could.
Last edited by mrwindigo; 04-21-2020 at 06:47 PM.
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