sacstinkytiger.DeleteThis@yahoo.com wrote:
> Hi,
> I thought I would just share with people a small victory ... I think at
> least for now.
>...
> Bingo no light!
> So for now anyway novice idiot mechanic 1, Honda Gremlins 0.
> Warmest regards, Mike.
LOL. Good job!
I too am pleased to report another recent VICTORY over the evil gremlins.
Used 92 Accord lit up the dread CE light after ~20 minute's driving.
Code 12 = ERG. Car also hesitated and stuttered at partial load and off
idle. Classic EGR problem, right? Clogged ports and/or flaky valve lift...
Checked / cleaned ports. They were sooty, but free flowing. No
improvement.
Removed EGR valve. (In itself a struggle. The aft bolt was heat seized
and rounded, and with the diaphragm casing overhanging, I couldn't get a
good grip on it with a socket. I just made it rounder.... Finally cut
it with dremel...) Anyhoo, the EGR valve seems to work as advertised.
Lifts at the right vacuum levels, seals when down, the lift sensor
output varies as it should. Hmmmm
Pulled EGR box. Regulator outputs 8inHG. Solenoid opens and closes
cleanly, seals well. Coil not shorted to ground. "This should work."
Pull ECU. Lift sensor signal shows at the correct wire.
En passant, changed plugs / tune up. Found about 1" of oil in the #1
plug port. DOH! Stuttering gone, but CE light still twinkling.
Hot wire solenoid. Apply DC juice when driving and observe output.
Getting only 3 inches, even with much more available on the solenoid
inlet. Recheck for leaks. None. WTF?
Start thinking about the bleed-back circuit in the solenoid. If the
output port is partially clogged, the bleed off will pull down the
output vac level. Look inside output port. Pressed brass metering(?)
jet of some sort. It looks pretty puny and I have nothing to loose,
being about to buy a new Solenoid, so 'screw it!' Drill out the brass
jet. Even using the smallest drill I have, the hole is much bigger, and
potential flow must have gone up by a power of 10 or more. VOILA!!! I
get another 1/2" of lift (all the ECU wants, apparently), and much
improved lift response time. Best of all, NO FRIGGING LIGHT! The car
easily passes smog test. WOOT!
Total cost: $15 for on of those vacuum guage/pump thingamagigies, and
about 5 hours total fiddling.
-Greg
>> Stay informed about: Victory for now vs. Check engine light!