Does anyone have pictures on the assembly wiring of the ECU. see pictures. Is the second relay (silver capsulated) wired properly in the pictures. P/N 61766200 When I opened up the compartment I noticed a loose wire - looked like it was supposed to be connected somewhere. Not sure if it should be connected to the single spade connector or was it supposed to be connected to the slot on the right?? (At the 3 o clock position on the relay?? I did connect them to the same Spade connector and the car started fine with the same issue for low bumpy idle. The idle is very rough and low to no power below 2000 rpm. Sluggish start but when I’m above 2500 rpm it’s fast. Also think I’m hearing a backfire - get an occasional pop on WOT parked while checking throttle response. Any thoughts would be helpful. Pictures of the relay assembly would be helpful also. View attachment 3045968 View attachment 3045969 View attachment 3045970 View attachment 3045971
Going by the mondial 3.2 qv diagrams the brown with black stripe goes to the tacho, but only shows one off. What colour is the 3rd wire ? Not an original connection for sure.
OK brown wires to the second relay. Does not look like a custom wiring issue as this is in the wiring diagram - just the the colors of the wires are not given. Apparently with the 85QV there are three relays two black on the ECU and this one. My question is are the two brown wires supposed to be on the same spade? Or does the one brown wire soldered to another go in the relay slot to the right of the 12 o clock position (@3 o clock) where the spade was originally. When I first opened it it looked like both brown wires were shoved into the 12 o clock position. Dunno if that is intentional or just happenstance. I’m doubtful that this simple connection is the bane of my fuel issues - but one never knows the Ferrari wisdom Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
I'm going to assume that you have a 1984-85 US version 308QV so please confirm/deny that before reading further. That is some serious hack-ology. What's happened is someone has replaced the now-unobtainable 5-pin US '84-85 308QV Protection Relay (that has a built-in 10A fuse) with some sort of WEHRLE relay (that probably doesn't have a built-in fuse so the "over-voltage protection" function is lost -- cars that would use this WEHRLE relay would have the 10A fuse somewhere else in the wiring harness). This figure describes how one connects the wires from the now-unobtainable 5-pin US '84-85 308QV Protection Relay (that has a built-in 10A fuse) to the still-obtainable 4-pin US TR/328 Protection Relay (that also has a 10A fuse, but it is externally accessible): Image Unavailable, Please Login My advice would be to buy the TR/328 Protection relay (you can get one from Pelican Parts, or Ricambi, etc.), and then hook up the wires as described in the figure above -- it looks like this (and is now Stribel 92861512402): Image Unavailable, Please Login The way it works is that, whenever the engine is running or cranking, the three PN (beige-black) wires should be +12V -- this is the +12V that runs the injection ECU and causes the frequency valve to "buzz". If they are not +12V, the injection ECU won't work and the air-fuel mixture will be very lean (because the frequency valve will be dead/always closed). Obviously, one of your PN wires has been cut and replaced with something else so that's a wildcard. Bottom line is that your frequency valve should be "buzzing" whenever the engine is running or cranking (you should be able to confirm/deny this just by touching it). Good Hunting!
Yes I have a 1985 US QV. Thanks Steve. I figured you might have insight. I’ll try your suggestions and share them with my folks working on the car.
It's also sometimes called the "metering valve" (it's located next to the fuel distributor) -- it's a controlled leak device that changes the lower chamber pressure in the fuel distributor to change the amount of fuel being delivered for a given plunger position (i.e., it changes the pressure difference across the slits in the fuel distributor which changes the amount of fuel flowing thru the slits for a given slit opening): Image Unavailable, Please Login
