fraggle

Yes yes, install the injectors in the rail, then rail to the intake. Pressure test first with the jumper wire on the fuel pump relay.

worf928

See above responses. If "bypass the relay" or "jumper the relay" is insufficient guidance, then do a search: there are many threads on technique and gizmos.

And to reiterate what Fraggle wrote: injectors in fuel rails, clips on injectors to secure injectors to rail, then rail into intake.

Any other order of operation results in a fuel leak unless you are just plain lucky.

worf928

Oil. Fuel would evaporate pretty quickly. 87+ air guides always have some amount of pooled oil measured in units of teaspoons.

Unless you are 100% sure it was gas then that means:
- You began your disassembly promptly after having run the motor such that there wasn't time for the fuel to evaporate.
- One, two or all of the two fuel pressure dampeners or regulator is dumping raw fuel into the air guide via the vacuum lines because the dampeners and/or regulator are internally broken.

Oil.

No.

Unless your 928 is unlike any other S4/GT ever.

The injectors, mounted at the inlet ports in the heads are injecting fuel onto the backs of the intake valves. This keeps the inlet ports clean.

The throttle valve housing - aka air guide and what I assume you call the intake distributor - is usually clean except for several teaspoons of pooled oil.

FredR

TRacy,

I think 5-0 must have scoured the planet to find 8 Lucas injectors that were actually working so not too surprised they do not have them any more - ha ha!B

I have some Lucas kit in my Jaguar and some of it seems as bad as the kit I had on my British motorcycles of the 50's and 60's vintage.

Wishing you well with them but I am truly intrigued as to why you would install Lucas items when Bosch are still readily available- maybe I am suffering from too many memories of driving around in the dark without lights and having magnetos pack up when it rained which is about every 5 minutes in good old Bighty!

Rgds

Fred

Taguid

Fred,

Thanks for the heads up! I had not found any new Bosch available at the time and I did not realize that Lucas injectors were that bad. I will replace them with new Bosch if I start having fuel delivery problems.

FredR

Tracy,

Doubtless they have improved a lot over the years and if they work OK fair enough- just remember that there is more to injector specification than just the nominal delivery poundage, things like impedence and opening time to mention a couple. If you use sharktuner then these things can be compensated for and/or addressed.

For what it is worth I am not entirely convinced that Bosch injectors are the best on the planet either given that over here they seem to need more frequent cleaning than other injectors but then on daily drivers or the wife's car one is not quite as fastidious about such either.