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I did if fact change out the 2 pieces yesterday. In both pieces there =
were cracks at where the nipples left the main crossbars. It helped a =
little, slightly noticeable. Not there yet, my mechanic sent it out =
today to another shop, he is stumped as well. New plugs, wires, timing =
chain, (timing set of course). It seems that was the only noticeable =
vacuum leak. Now the oxygen sensor will be replaced, it connects at the =
exhaust and wires to an inboard computer under the passenger side inside =
cabin in the firewall. We're still working on it.....
"Paul Mckechnie" <pmckechnie@[EMAIL PROTECTED]
> wrote in message =
news:481b7fa1$0$5117$4c368faf@[EMAIL PROTECTED]
It's a long shot but I saw a case like yours one time that the =
mechanic that had done the engine couldn't get it to idle smooth. =
Turned out to be a new rubber part. On each side of the engine between =
the valve cover and the injectors is a rubber hose piece that has 4 =
niples that hook to the 4 injector shields. One of the niples was pluged =
up. The engine gets idle air through these niples hince one cylender =
got no idle air and would miss. If you take off the hoses and look in =
each niple you can see if it is blocked.
This is a very hard problem to diagnose, but an easy one to fix.
Paul
"Tony Pike" <tonypike@[EMAIL PROTECTED]
> wrote in message =
news:dsqSj.3729$XI1.2018@[EMAIL PROTECTED]
I just had a 1988 420 SEL 4.2 Litre motor completely rebuilt at a =
reputable shop. Everything seems fine, leak down test, wet and dry =
compression test -all checks out o.k. When at idle, the motor visibly =
shakes and seems to be missing. The mechanic is even at odds here, and =
might send it outside to determine the problem. Of course everything was =
installed correctly, timing set, plugs gapped, etc. Could this be a =
vacuum leak, fuel/air mixture issue or some relay at fault here? Any =
suggestions greatly appreciated.
Tony.
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<META http-equiv=3DContent-Type content=3D"text/html; =
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>I did if fact change out the 2 pieces =
yesterday. In=20
both pieces there were cracks at where the nipples left the main =
crossbars. It=20
helped a little, slightly noticeable. Not there yet, my mechanic sent it =
out=20
today to another shop, he is stumped as well. New plugs, wires, timing =
chain,=20
(timing set of course). It seems that was the only noticeable vacuum =
leak. Now=20
the oxygen sensor will be replaced, it connects at the exhaust and wires =
to an=20
inboard computer under the passenger side inside cabin in the =
firewall.=20
We're still working on it.....</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV>"Paul Mckechnie" <<A=20
=
href=3D"mailto:pmckechnie@[EMAIL PROTECTED]
">pmckechnie@[EMAIL PROTECTED]
>=
>=20
wrote in message <A=20
=
href=3D"news:481b7fa1$0$5117$4c368faf@[EMAIL PROTECTED]
">news:481b7fa1$0$511=
7$4c368faf@[EMAIL PROTECTED]
>...</DIV>
<DIV><FONT face=3DArial size=3D2>It's a long shot but I saw a case =
like yours one=20
time that the mechanic that had done the engine couldn't get it to =
idle=20
smooth. Turned out to be a new rubber part. On each side =
of the=20
engine between the valve cover and the injectors is a rubber hose =
piece that=20
has 4 niples that hook to the 4 injector shields. One of the niples =
was pluged=20
up. The engine gets idle air through these niples hince one =
cylender got=20
no idle air and would miss. If you take off the hoses and look =
in each=20
niple you can see if it is blocked.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>This is a very hard problem to =
diagnose, but an=20
easy one to fix.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Paul</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV>"Tony Pike" <<A=20
href=3D"mailto:tonypike@[EMAIL PROTECTED]
">tonypike@[EMAIL PROTECTED]
>> wrote =
in message=20
<A=20
=
href=3D"news:dsqSj.3729$XI1.2018@[EMAIL PROTECTED]
">news:dsqSj.3729$XI1.2018@[EMAIL PROTECTED]
>...</DIV>
<DIV><FONT face=3DArial size=3D2>I just had a 1988 420 SEL 4.2 =
Litre motor=20
completely rebuilt at a reputable shop. Everything seems fine, leak =
down=20
test, wet and dry compression test -all checks out o.k. When at =
idle, the=20
motor visibly shakes and seems to be missing. The mechanic is even =
at odds=20
here, and might send it outside to determine the problem. Of course=20
everything was installed correctly, timing set, plugs gapped, etc. =
Could=20
this be a vacuum leak, fuel/air mixture issue or some relay at fault =
here?=20
Any suggestions greatly appreciated.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> =20
Tony.</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>
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