Re: 1987 Ford Ranger problems
Big T. wrote:
> I posted here a couple of weeks back and I just wanted to update you on what
> was happening. If you remember I have an 87 Ranger 4 X4 with a 2.9L engine.
> I was driving about 55 and it just powered down completely. I did not have
> any spark. Anyhow, after changing the ignition module, ignition coil, and
> performing all sorts of tests I still couldn't get it running. So, I took it
> to a local mechanic who after a lot more testing has concluded that it is
> the computer that has went bad. We are waiting on the part right now so I am
> not 100% sure it will work yet. Have any of you ever heard of this
> Tim in Indiana
Haven't had it happen to me personally; but a vehicle computer does
sometimes fail. The 2.9L 's computer has an excellent record for
longevity.... but shit does happen. The TFI ignition module is a known
"hi-fail" item; going there first was not a bad idea.
You went thru the "substitution troubleshooting" maneuvers well though.
Others may disagree on the fine points; but here's the guidelines:
Substitution Troubleshooting Guide:
1) Do the best you can with the tools and trainimg you have to get the
problem isolated to as few parts (that you don't have on hand) as
possible. You've aleady gone thru those; right?
2) See which ones you can borrow; try those first. If no luck there >>
3) Now you get to make decisions! There's three choices to balance
a) which is cheaper
b) which is easier to replace
c) which is locally available
4) If this didn't fix it; decide again.
The "no spark" problem choice of the TFI is 3 a/b/c for most folks as
its reasonably easy to replace; not badly expensive; and widely stocked.