Re: [T3] still won't idle....

["Dave Hall" <dave@hallvw.clara.co.uk>]

Poor fuel consumption on injection is often due to a leak in the
pipe from manifold pressure sensor to intake air chamber. (Or a hole
in the diaphragm inside the pressure sensor).  The favourite cause
of changing idle speed is air leaks to the intake air chamber,
either at the big hoses to the four intake pipes (try turning them
round a bit and see if the idle speed changes), or on the hose from
the warm-up device (where the fuel pump is on carb Type 3s) to the
underneath rear of the intake air chamber.

Check all the hoses for security and leaks; remove and replace the
connectors (carefully!) and you may find it's OK.

I've found very fine tuning of the distributor timing can
significantly change idling, particularly with the twin vacuum
distributor (two pipes into the vacuum chamber).

This sounds so like the problem a friend has at the moment with her
injection Squareback.  She had trouble with the pump relay, but that
seems to be OK now.  She has poor fuel consumption too.  If you find
a nice, clear solution, I'd be grateful to hear, Sonny.

Dave (Hall) (UK VW Type 3&4 Club).
www.hallvw.clara.net/

-----Original Message-----
From: Sonny8oy@aol.com <Sonny8oy@aol.com>
To: type3@vwtype3.org <type3@vwtype3.org>
Date: 12 August 1998 00:20
Subject: [T3] still won't idle....


>'69 f.i., AT.
>timing set.
>
>like i said, my car won't idle.  suspecting it merely to be set to
850rpm (not
>950 as AT should be) turned up the idle a bit.
>
>still not idling.  basically it's not consistent.  occasionally, it
will run
>fine, but by the next light, it may want to die.
>
>probably connected to this is my other increasingly major problem:
>highway driving - after more than 5 minutes say, on the highway at
55-60mph,
>the car will suddenly lose power and slow down.  previously this
happened at
>speeds of 65mph, now it's even beginning to happen at 50mph, and
when driving
>around town.  sometimes it will correct itself in 4 or 5 seconds,
other times
>i'll have to pull off the road, let it die, and restart it (giving
it some
>gas).  when this happens, black smoke (could be blue, i'm only
looking in the
>rear view mirror) comes out the back.
>my favorite thought about this is the fuel pump.  could it be on
the way out?
>is the car simply not getting enough fuel?
>other thoughts:
>severely blocked fuel filter (unlikely, since i changed it 5k miles
ago,
>although i did run out of gas once which could have dragged some
crud from the
>tank into it).
>
>some other perhaps relevant points:
>changed the coil (for a used one) suspecting it me be defective,
like toby's
>dad had had, but no difference.
>been getting terrible fuel, economy for a while - about 18mpg.
>same symptoms if i put the car in 2nd or 1st gear, so i don't think
it's
>anything to do with the AT.
>
>hope someone can understand what i'm talking about.
>please help, i'll be commuting 4 hours/day in a couple of
weeks.....
>thanks in advance,
>
>sonny
>
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