RE: IML: Engine problems

["Brooks Harkey" <vm.dude@xxxxxxxxxxx>]

I think you have "outted" the suspect and don't realize it.

What everyone else said on vacuum leaks applies, but the big hint (I think)
here is that you say when you put it in gear, it begins to idle roughly.
The *other* thing that probably happens when you put it in gear is that you
put your foot on the brake -- and if there is a bad seal or a leak in the
power brake booster, maybe it doesn't leak when the brake is *not* pressed,
but begins to leak vacuum when you press on the brake pedal -- hence, the
bad idle shows up when you put it in gear.

Check that out.... disconnect the brake booster and plug the line.  THEN see
how it idles in gear.  If it's now fine -- VOILA!

WARNING:  It'll be a LOT harder to hold the car from moving when that's
disconnected, so don't drive the thing thru any walls or over somebody.

--Brooks in Dallas
PS:  I'd love to know if this ends up being the culprit!  I like it when I
diagnose a car from hundreds of miles away.  (:-D)


-----Original Message-----
From: mailing-list-owner@xxxxxxxxxxxxxxxx
[mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of JAY D'ANGELO
Sent: Saturday, September 17, 2005 12:46 AM
To: mailing-list@xxxxxxxxxxxxxxxx
Subject: IML: Engine problems

Just put a brand new long block 413 in my 64 Imp Convt., but it doesn't idle

properly and is very sluggish off the line.  We did a new PS unit, water 
pump, radiator, master brake cylinder, coil, points, condenser, cap, wires, 
plugs and an Edelbrock 1406.

We set the plug gap at 35, points at 16 and the dwell dropped to 21.  I 
hooked up the vacuum advance hose to the driver side port on the carb and 
wired the electric choke thru the whatumacacallit on the firewall.

we set the timing to 10 and got it to idle smooth, then it would get rough 
in gear, like it had a vacuum leak.  Then we were able to get it falrly 
smooth by readjusting the distributor and it roared in park.  In gear, it's 
smooth but slow off the line and pings.

My mechanic is tearing his hair out and I'm not too happy, either.

Any suggestions on this one?

Jay




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