[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]

Re: [T3] Still Can't Get Right With The New FI Parts In.

On 25 Aug 2001, at 21:32, Mark Healey wrote:

> On 24 Aug 2001 17:37:43 -0700, Mark Fuhriman wrote:
> >Mark, it's been a while.  Please give a description of your symptoms
> >again.
> Something about running rich..?  What did you change, why did you
> change, and what is happenng now?
> P.O. had a min-n-match FI system in there.  I couldn't get anything to
> ajust right.  I finaly got the parts for a complete 71 system and put
> it in.  Things are better but there is black smoke in the exhaust, it
> can't handle hills, the mileage is crap.
> Valves are adjusted.
> Dwell and timing are set.

Did you verify that both the vacuum and mech advance 
mechanisms are working properly?

> Idle is at 800.
> Fuel pressure is at 30.

Did you measure the system voltage on a warmed up engine, med 
rpm? Should be 14.1-14.4V; anything more than 13.5 is okay.

> Measured from the ECU plug on a cold engine on a hot day.
> Primary 100 Muir sez should be 90.
> Secondary 350 Muir sez 350.
> Temp Sensor 1 250 Muri sez should be 300.
> Temp Sensor 2 I forgot what it was but wrote OK in the book.
> Throttle valve switch is OK.

these sound fine.

> You mentioned a temp sensor might be wrong...  Which one?  I
> think the cylinder head temp sensors are essentially all the same
> (shorter wire after '69 I think).  Then there is the air temp
> sensor.  The early (68-69) are mounted on the aux air regulator. 
> Later sensors go on the intake manifold I think. 


> Doesn't matter.  Jim says it controls the cold start valve which I
> don't use anyway.
> What do I check now?

Check your grounds: on the center of the engine and the ground 
wire on the main power relay under the back seat.

Check for loose connectors that might not be making a good 
connection all the time.

Can't hurt to pull the FI trigger points and clean them with a clean 
piece of paper.

Check spark plug wires to make sure they are wired up correctly.

Check spark plug connectors to verify that they each have ~1000 
Ohms and that the dist rotor measures ~5000 Ohms. Make the 
connector measurement all the way thru the SP wire. Look at your 
condensor, rotor and cap and replace any part that is not Bosch.

Make sure that the + side of your coil has the 12V connected to it 
and that the dist is connected to the - side.

Try a different ECU.

Try a different Pressure Sensor.

I'm running out of ideas.

Where are you located? Perhaps there's someone near you who 
could help.

Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA

Too much? Digest! mailto:type3-d-request@vwtype3.org Subj=subscribe

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [New Search]