fuel injection probs- coupe gt

[Ameer Antar]

all i'm saying is within a few hundred miles, I'm sure you'll need new 
injectors if you want your car to perform and start on the first crank. 
Injectors can be had for reasonable prices from wholesalers and are easy to 
put in if there's no insert. Bad injectors can give the same 
symptom...maybe the injector is gummed up, but under enough pressure, open 
up more, so the injector might be just sluggish, causing a rough spot at 
around 50% open.

It could also be a gummed up plunger, vac. leak [maybe at injectors], fuel 
system problem. To diagnose CIS, you need a special fuel pressure kit. I 
found one for $55 and has helped me eliminate problems w/ my warm-up reg. I 
just think CIS injectors need to be very new to work right. As Haynes would 
say, it is a false economy to reuse old injectors....



At 05:36 PM 10/11/00, you wrote:
>cheers for the advice but im inclined to think it isnt just a dodgy injector
>because when the car pulls through the really rough spot it pulls extremely
>quickly and cleanly,  i may check the regulator out, by disconnecting it
>electrically, and by disconnecting the vacuum line
>----- Original Message -----
>From: "Ameer Antar" <ameer at snet.net>
>To: <quattro at audifans.com>
>Sent: Wednesday, October 11, 2000 9:53 PM
>Subject: Re: fuel injection probs- coupe gt
>
>
> > you need new injectors, but make sure there are no vac. leaks ANYWHERE.
> > There's not really anything you can adjust in the distributer or warm-up
> > regulator. The only screw to adjust idle mixture is the 3mm hex screw
> > between the fuel dist. and air-flow valve. But the injectors have to be in
> > perfect working order in CIS. If one of the injectors that you cleaned to
> > the best of your ability didn't work, the rest are probably in not much
> > better of a state. Do all the standard checks while you wait for injectors
> > to arrive. you're gonna need 'em in a couple hundred miles anyway, so yer
> > better off doing it now.
> >
> > -ameer
> > '84 5kT
> >
> > At 04:04 PM 10/11/00, you wrote:
> > >well ive got my car back together, and fitted a second hand fuel
>injection
> > >system which i stripped and cleaned to the best of my ability.  when i
>fired
> > >the car up it ran badly and wouldnt idle. after a plug inspection, and
> > >felling the manifold i determined that no 1 was bad, i checked the
>injector
> > >out of the car and it let very little petrol through, so i swapped it for
> > >one of my old ones, the car was better, to get it to idle better i had to
> > >wind the screw out by 1.5 to 2 turns, all better now.  i then drove the
>car
> > >home, it was perfect to 2 grand, then major flat spot/rough running, at
>3250
> > >it cleared and the car rocketed better than it ever had done before.
> > >   when i checked the plugs before i also notice no3 seemed very wet.
> > >my question ...... what happens at 2000-3250 revs that would make the car
> > >undriveable, i considered leaning of no3 (i presume thats what the screws
> > >are for by the injector take off points)  but thought it may be something
> > >else ie. 6th injector...... aux air valve, or regulator.....
> > >when i stripped the system i removed the gauze from the fuel
>distributor,.
> > >and the one from the regulator.
> > >any help/questionss would be great
> > >thanx
> >