308 Fuel Injection Help Please

Just getting back to finish a major rebuild, but the car won’t start.

82 308GTSi North American spec

No air pump or any other smog stuff remains on car.

Millermon Distributor & MSD box, but not likely a problem, see below.

New fuel pump, filter & regulator, but note pump not same part number and that check valve removed from new pump as it wouldn’t fit original plumbing.

I should have 72-82 psi (5.0-5.6 bar)on primary fuel circuit. What I do have is 25 psi after 8 seconds cranking at the cold start injector, and 0 (zero) psi at one of the cylinder outputs. I think I need 40 psi at least to open an injector.

I tried squirting ether into the air plenum and the car runs for a second or so, so I think the Millermon distributor is working OK.

This is my first try at FI, & not sure where to go from here; wd be grateful for any suggestions.

Tx, and apologies if it’s something obvious I should have figured out or found in the archives.

I'm not exactly sure what you are refering to on the pump, but I would start with a pump pressure test Unhook the main line into the fuel distributor,and hook in a 200 LB (min) gauge. That will establish if it is pump/filter (one in the tank, a screen too) etc. Then follow with checking the O-rings on the system pressure shim area. The book recomends hanging them EVERY time you open it up, but I have gotten more than 1 use with a bit of vasoline and care installing them.
Another thought.
Gas sitting quickly breaks down. I would mix a can of Techron with an equal part of gas and let the pump feed it into the fuel distributor. Let it set a while, then pull the lines from the injectors and while it is flushing, you can check fuel delivery. Dont try to run it with that mixture,or you will get some plug cleanig experience, I know, lol!
Hey, could ya post a pic of the Millermon? afriend of mine prepaid for one for his Mondy, and I'd like him to see what the look like, as he was one of few that got a bit shortchanged.
Thanks,
Kermit

Thanks Kermit... I've sent a photo directly.

The silence says there's no magic bullet here; I'd hope someone would say, "You dummy, you've obviously crossed the line to the control pressure reg." or something.

I'll work through the manual checking everything piecemeal. Sure don't like all that gas flowing 'tho.

Rufus,
Here are a couple of site that do a step by. Most helpfull:
http://www.auto-solve.com/mech_inj.htm

E:\BK1\DESKTOP\FERRARI\K-Jetronic Troubleshooting Symptoms.Great place to find what you have been staring at all along
HTH, Kermit
BTW Check the vacuum hoses to the control pressure reg.

I dont understand how you could have pressure at the cold start valve, but not at the injector. I thought it would be somewhat equal. Also, 25 psi anywhere in the system seems awfully low, I thought you had pressures that were normally above 60 on all the CSI cars.

If the air door is not pulled down by the incoming air, the Bosch wont let it have fuel either. That is if it is adjusted correctly.
It is really a simple design. The more the air flapper is pulled down, the more it pushes the "Pintle" up, causing more fuel to flow to the injettors. As I typed this I realised that your door may very well be out of adjustment. When working on a K-Jetronic, I like to use a remote starter switch (clip on leads, push button type) to power the pump, and that leaves the key off. This can be a real help when working on the WUR pressures as it doesn't power up the element in it, thus causing it to go to Warm Pressures.
As to adjusting the air door, I use the following method: Crack or break loose one injector fitting. With the pump on you should not see ay fuel leaking. If there is, Go afterthe adjusting screw, which is a 3mm allen head located under a plug alongside the air door.Turn I gently and slowly counterclockwise to lean the mixture Clockwise of course fattens it up. Back i toff until any seepage around the injector fitting stops and that should be a good starting place. Paul is right on the money on the injector pressures, it takes 3.0 to 4.1 bars, or about 44 to 60 lbs. Most will pop at 50 lbs and that is considered good.
The cold start injector is a completely different circut than the regular running system It sounds to me like you do not have sufficient fuel pressure, which will show up on a pressure test. I was a bit brief in my earlier mention of it. Following the line from the pump, to where it enters the fuel distributor, remove that line and with the appropriate fittings plumb it drectly to a gauge (200 lb) With the pump turned on you should show about 175 lbs as I recall. If there isn't enough pressure, check the filter(s). On a coincidental note. The fellow I spoke of earlier on the distributor and I were on our way to the dyno to set the injection, timing etc. I stopped a got a fresh tank of premium, and didnt find out until on the rollers it was watered down. Bad. was pulling shims left and right trying to fatten up the mixture, and it didnt seem to change much at all. 1 shim will make about 2 lbs differance in system pressure, and the fuel ratio accordngly. On the last pull the Mondy shut off, like it had hit a Rev Limiter. It had in reality plugged up the filters so badly, they wouldn't let enough thru to open the injectors!
HTH
Kermit
BTW: Nice to see you here Krowbar! You will like it I think

An anonymous reader who rebuilds Bosch FI systems sent me a note... AND THE CAR IS RUNNING! Tomorrow I'll post a photo of what I had to do using a Mercedes part, to make it work.

Much thanks to all for help and comments!

WPG