We got the repalcement ECU ihn and it works fine in my Civic,
but the other Civic will not start. Cranks great, getting fuel
into the throttle body, and has spark, but does not even try
to fire.
Tigger over in the Toyota group suggested that I check the
PGM relay, and the solder di look dull and crystallised.
So I removed the old solder and resoldered, then used a mil spec
silicone "conformal" spray to protect it. I have since
tested that in my Civic.
The one big difference between the cars is that the non
running Civic blows air back through the throttle body.
This apears to happen once per revolution.
Tuesday afternoon, after some repairs to her CPU, I was able to
start the engine, but got a PA sensor error. I removed and continued
repairing the ECU and Thursday afternoon, I tested it again.
Thiat time the engine tried to start but died after a second or
so. When I cranked it againm, I heard a sound that I had never
heard before. I now know it to be the air coming back
through the throttle body.
I am afraid the T-belt has really jumped and the engine is badly
out of time. My wife has gone to visit her mom, abnout 100 miles away.
so I don't have my car for comparison.
Can I use a timing light to rough check timing?
I have trid to use a long wodden dowel to find TDC in #1, but even
with all the spark plugs out, I just can't turn the flywheel by hand>
A hint to everyone with a 1990~1994 Honda. Itmight be well worth your
while to check your ECU for corrosion. I have taled to several local
Civic owners who have had bizare errors on their ECU and I have
checked
2 and found the electrolytic capacitors has signs of leakageone of the
47uF/35V and the 220uF/35V show seriuos corrosion. Since I up to my
bellybutton in engine problems I was not willing to replace their
capacitors at this time. With a good work station, controlled temp
soldering iron, antistatic solder sucker it should take less then an
hour to change
all 6 electrolytics caps. Given that a rebuilt ECU will run $150 and
up,
it could save you some real money.
While her ECU appears to have been wet, there is no sign that water
has
been in the floor pan, the noise reduciton carpet shows no sign of
mildew,
their is no interior rust etc. I am beging to suspect that the prior
owner got ripped off for a repair and somebody swtiched a flooded unit
for a good one. Either that, or someone pulled a midnight switch. How
many different key patttterns does A Honda Civic have anyway?

Terry