Starting difficulty, 1985 308GTBQV

Many with K-Jet model Fs have. There are two different relays controlling your fuel pump operation. For a first thing, try a different ...101 relay in the "relay for start injector" position. If no joy, try a different ...113 relay in the "fuel pump relay" position.

 

When you turn the key to position 2, do you hear the fuel pump energize? If not, could be the relay, and could also be a bad fuse or corroded fuse connection in the fuse block, fuse #3. The fuel pump relay is lowest left side of relay panel, and is 0332014113.

You may know that the fuse block is a poor design, and spade connections get loose on the block itself. The play is so bad for at the fuse block #3 position of my 85 308 QV that my fuel pump will lose power over bumps while driving, or if the wire to it is moved while the car is idling. I'm replacing both blocks with the Birdman upgrade blocks soon.

 

Yes, 0332204101 is the metal-cased Bosch SPDT relay. If some of your relays have been "updated", 0332209151 is the black plastic Bosch equivalent for 0332204101 as is the purple plastic Tyco V23234-A0001-X037 or Tyco V23234-A0001-Y037.

If you don't have a copy of the OM for your car, please indicate the version (US or euro), and I will post a link for a pdf copy of the OM. You should add model year and version for your "308 GTB QV" to your FChat Profile.

 

The 308QV fuel pump does not run with just the key "on" and the engine not running -- unless the safety switch is unplugged or you manually deflect the airflow metering plate down (which opens the safety switch contacts). If your fuel pump does run with just the key "on", isn't the best situation IMO.

 

I'm glad you said it Steve. I was going to point that out as well.

Personally, I installed a optional relay-bypass switch with a status light that illuminates when the pump circuit is energized. It was temp rig while I was troubleshooting, but I liked it so much I re-built it as a permanent installation. I have a similar bypass switch and status light for the fan circuit. I'm sure people will hate on me for such mods, but I'm a bit of a control freak, and used to aircraft systems where everything remotely critical can be monitored and bypassed if necessary.

 

Not sure that I follow you here. Anything that requires the human to do something isn't as safe as the stock arrangement -- which is designed to shut the fuel pump "off" if the engine stops running and the key is "on". If you are unconscious after a bad accident, and the fuel system has been ruptured, having fuel spray out of the rupture at 5 bar (because the key is probably still "on") is bad news.

I will add that Ferrari did all 308 K-Jet and 328 K-Jet Owners a disservice by calling that ...101 relay the "relay for start injector" (or some of the other weird names that it has). It should've been called "relay controlling the fuel pump relay" so people would better know that it is also involved in the fuel pump operation.

 

Sorry, I think you misunderstood me Steve -- I have a switch that when closed effectively joins the 30 and 87 pin of the fuel pump relay, as you would during a static test of the system and control pressures, or testing the pump output. With the switch in the open position, the relay acts as normal, with the usual protections in place. I should mention also that the switch is spring-loaded open, and has to be held closed during testing (or priming/purging the fuel system) -- so there is no danger of the pump continuing to run after the engine shuts down. Does that make sense now? The status light just tells me that the pump is actually drawing power.

 

Hello, I'm not finding the second relay mentioned above (0 986 AH0n251), can anyone please confirm the part number? Thank you!

 

Thank you very much! I'm going to pick up a set to keep in the trunk just in case.