4kq Fuel distributor/pressure?

[Ado Sigal]

Huw Powell wrote:

>
>
>> I have a '85 4000 Quattro. it wont start, but actually it will but
>> only after about 20 minutes of cranking/turning off and on fuel pump
>> manually
>
>
> most of description edited... basically I think you are not getting 
> enrichment (extra fuel) when the engine is cold.  You are then firing 
> it enough over 20 minutes to get it warm enough to run at "warm idle" 
> fuel levels.
>
> Most likely culprit is Ben Swann's favorite, the thermo sender for the 
> CIS system, which is found on the bottom of the coolant neck on the head:
>
> http://www.humanspeakers.com/audi/cise2.htm
>
> It can be tested by removing and measuring its resistance in ice water 
> and boiling water, I think it goes from a fairly high resistance whne 
> cold to 50-100 ohms or so when hot.
>
> I don't think it has anything to do with your fuel pump relay, so just 
> leave that in place.
>
> You can also take a quick look at all the items on this list (but I 
> still think it's the temp sender):
>
> http://www.humanspeakers.com/audi/tuning-cise.htm
>
Its also worth looking for air leaks around injector area; try to 
manually operate the f/distr/ plate and throttle simultaneously. If 
there is improvement, the air leak could be the cause.

Ado