Hi Rene,
Did you measure the pressure of each cyl.?
Looks like not all cyl's are running well, so check if all sparkplugs really
are working.
The irregular idling indicates the engine propably is not using all it's
cylinders.
If it's the 3-4 carb, you can visually look into the venturi, where the jet
should generate a kind of fuel spray sucked into the inlet manifold.
If the front carb shows this and the other not - the 3-4 carb is starving.
Check the float chamber.
Pinging sound may derive from vibration of the engine itself, while it runs
irregularly.
Underpressure: put some little oil in cyl 3 and later 4.
This may give some smoke, but also will force higher presure when piston
rings are faulty.
Good luck.
Just have had my engine tuned.
Have to collect the BGT now.
I really wonder how it behaves...
Cheers,
Hans
-----Original Message-----
From: Reni C.M. van Maanen [mailto:cmvanmaanen@hetnet.nl]
Sent: Wednesday, April 18, 2001 3:58 PM
To: mgs@autox.team.net
Subject: still having troubles
List,
About one month ago I mailed the list about the trouble I have with the 1800
GT engine.
The problem was that it the engine made a noise like it was pingin heavily,
when increasing RPM.
I first thought it was the big end bearings, so I replaced these and also
the oil pump, since the rotors did not look to good to me. But...... still
having troubles. Pinging sound.
What I have determined so far:
I have some underpreasure in the engine. When I remove the oil filler cap, I
can feel the under preasure and as soon as I remove the cap, the engine
starts running faster, say from 700 to 1200 rpm.
The engine shakes heavily when idling.
When removing the # 3 and 4 spark plug cap, nothing happens. The engine runs
like before removing them.
-when removing either #1 or #2, the engine dies-
I checked the # 3+4 carb, all looks OK. Including the floatlevel. It has
fuel in it.
When removing the #3 or #4 sparkplug, I can feel the compression, but not
smell any fuel.
Question:
Where can I look next? Where does the underpreasure come from?
Thanks in advance. Rene
Reni van Maanen
My NOS parts for sale:
http://www.homepages.hetnet.nl/~honda-sohc4/rene/nosparts.htm
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