jpitman2

If the injectors squeal with no air moving, it will flood quickly. Backed off a tiny bit from just squealing to not should give a runnable mixture.
jp 83 Euro S AT 55k

FBIII

I didn't say squeal like a pig! Just a faint noise. I'm suggesting a logical approach to determine whether it will run not the tuning that will enable him to pass a CA smog inspection.

missile2511

Wow!!! Thanks for all of this input. I am exploring now if I am missing components, like the accumulator. Did the 928 come with CIS after 1979? The engine I bought was said to be a 4.7 from 1983 and I see where jpitman2 also says that his 83 has CIS. I have seen some references where the 928 went to afc in 1980.
Thanks again.

FBIII

Let's find out what engine you have and then the most prudent way to progress. Report back with the engine number stamped on the rib beneath the thermostat housing. If your engine is a Euro S 4.7 then it would be worth the headaches making the CIS system work in an Ljet chassis. If you have a lesser engine it would be a heck of a lot easier taking the ljet intake system off the original engine and transplanting it to your new engine. This of course if the old engine's fuel system is still available.

missile2511

The new engine number is m28/11. 82d0403
The old engine number is m28/20. 81e06329

missile2511

As I research the 28/11 it seems that it is a much better engine than the 28/20 that I started with.

jpitman2

The accumulator is really only needed to help warm to hot restarts, not really relevant to a cold start problem. Once you get the thing running properly you will able to check the accumulator is working .
jp 83 EuroS AT 55k

FBIII

I'm trying to recollect the differences between the two systems from my adventure well over 10 years ago. My biggest hurdle was the different fuel lines for each system. CIS has two and Ljet has 4 lines I think. I'm wondering if its possible to get fuel pressure w/o changing to the matching fuel system.
The more I think about what you are doing the more I think the best/easiest route to go would be to convert the new engine to the electronic injection off the original engine.

jmartins

My car was stopped for 15 years and the first thing I made when got it, was bypass original fuel lines (fuel pump, tank and accumulator) with regular EFI fuel pump directly at fuel hose in engine bay.

No success... The car only started when decided to clean the original fuel lines, fuel tank, accumulator and installed new CIS fuel pump.

Not telling you that a fuel accumulator is the only reason, but keep in mind that fuel pressure is very important for CIS setups, and if there is something wrong, the engine will not run properly.

STRIKEMASTER

Here's some info from my Bosch K-Jet book. Hope it helps.

Tampa 928s

You have all the parts why don't you use the L-Jet unit?
I converted my 78 from Cis to L-Jet!