Good afternoon - Just finished rebuilding the engine. Tried to start it for the first time and I get a few seconds of start and then it dies out. Checked fuel pump and that seems to be running ok and also have spark, but can't get it to run continuously. Fuel tanks were completely drained if that would make any difference? Would there be an air lock in the fuel system, something I need to prime? Thanks
Sorry...2v injected Just let the fuel pump run on ignition and I get a ticking noise after the initial prime. Is that normal?
There is no "initial prime" on a CIS model -- the fuel pump is either always running or always not running (and it doesn't run with just the key "on" when the engine is not running). Unplug the blue safety switch on the fuel distributor, then turn the key "on" = you should hear the fuel pump running.
Fuel pump definitely ticking (thats when I'd disconnected the safety plug. Reconnected it as it got quite hot if left running) Im guessing the initial start is caused by the cold start valve letting a little fuel in? I opened the 12mm nut on the WUR and got pressure with a face full of fuel, but I didn't get the same on the individual pipes on top of the fuel distributer. How can I test them?
(When the fuel pump is running) The airflow metering plate has to be deflected downward (which deflects the plunger inside the fuel distributor which uncovers the slits) to have fuel come out the top ports where the injector lines connect.
Might need to set your fuel distributor. With fuel pressure in the system, everything turned off. Remove one of the Hexbolt lines from the top of the fuel distributor. Turn the mixture adjustment screw until it barely begins to fill the cavity and back it off a quarter to a half a turn that will preset the fuel distributor. I have my big air idle screw cracked open an eighth of a turn. That should get you in the ballpark to get it running adjust as needed to stabilize it. My air fuel ratio is set to 14.1 it runs about 13.5 for 2500 and drops down to 12.1 at full throttle.
Thanks - Ive tried turning the screw about 4 turns CW and still no fuel appearing. I didn't want to go much further or is it a case of keep going until it appears? Ive definitely got pressure from the pump
Which screw? The mixture adjustment screw is between the fuel distributor head and the air filter. You need to remove a cover, cap or screw cover in my case then use a 3mm Allen key about 10" long to adjust the mixture.
Yes, that's the one. Took the small screw out and kept turning the allen key clockwise but no fuel evident in the thread cavity
Afraid you might say that! What checks can I do on that one? Am I right in thinking fuel from the pump goes to the side of the distributor, then up to the WUR and then back to the centre (top) of the distributor? If so I should see pressure on the 14mm outlet. Ive got pressure on the 12mm inlet on the WUR. Should there be a full 12v supply to the WUR with ignition on and fuel pump running? Just checked and only had 9.9v if that would make a difference?
Not a fuel injection expert, but one thing to note. When I had trouble with the CIS/Lambda on my 328, I found a lot of step-by-step CIS how-tos on VW sites. Ferrari used CIS for maybe 10 years, on a few cars. VW/Audi used it on many many more cars. Much larger support base.
Carl Rose wrote this. The kit I bought had full instructions. http://b2resource.com/PDFs/Ferrari328CISfuelpressurecheck.pdf
Thanks - Ive been through the procedure which all makes sense but Im not able to start my engine to idle. I did try turning it over again and let it initially fire without the fuel line connection to the WUR and there was no flow of fuel. http://www.ferrarichat.com/forum/attachment.php?attachmentid=2281306&stc=1&d=1471767945 Image Unavailable, Please Login
Could it possible the main two fuel lines from the pump to the FD (pressure)and from the FD to the passenger side tank (return) are reversed?
I did check that, Ive got the one from the pump going over to the far side of the FD and the return coming off the nearer side of the FD back to the tank. Ive ordered a new fuel pump as maybe the easiest process of elimination.
Please reconfirm these two lines. The fuel pump line in mine (top line in photo) goes to the nut on the FD the return line goes to the banjo. Just went out and took this photo. Image Unavailable, Please Login
Ok hands up...school boy error! Yes, I connected up the the feed / return pipes the wrong way around. Many thanks for your help and apologies for being such a numpty However...it now fires on the turn of the key but I still cant keep it at idle
Might need to set your fuel distributor. With fuel pressure in the system, everything turned off. Remove one of the Hexbolt lines from the top of the fuel distributor. Turn the mixture adjustment screw until it barely begins to fill the cavity and back it off a quarter to a half a turn that will preset the fuel distributor. I have my big air idle screw cracked open an eighth of a turn.
After you get it running and it's warmed up then you can tune the Air fuel adjustment to the proper range.
I've never heard of this. Is this documented in one of the Bosch or Ferrari manuals somewhere that I missed and can read up on?
