308 ‘safety’ switch not functioning.

308 safety switch disables starting. That is, if the blue/greenish plastic switch that plugs into the fuel metering unit is plugged in my ‘80 i 308 doesn’t want to start. Unplugged it starts. How do I fix or replace ?
Thanks

 

May I suggest that you move your question over to the 308/328 subforum…I’ve found over the years that the model-specific forum members are both more responsive and knowledgeable. Steve Magnusson in particular will be able to help you figure this out.

good luck,
Alan
N.J.

 

OK, first, you're going to get a demerit for not having the version (and model year) of your 308GTSi listed in your Profile .

If you have a US version 1980 308 GTSi = try a different ...101 relay in the relay P (Relay for start injector) position. Relay P is in the bottom row on the far right side. You can temporarily "borrow" a ...101 relay from one of the headlight functions for a test. Relay P should really be called the "Relay controlling the Fuel Pump Relay".

If you have a euro version 1980 308 GTSi = give a shout back as that (surprisingly) has a somewhat different electrical architecture for the fuel pump operation.

Also, please clarify if this is for all starts (cold or warm) or only just warm restarts (as that's a different kettle of fish).

 

If it is equiped with kjet, aside from an electrical fault, these are the possible culprits:

• Fuel pressure regulator seals (see DeLorean cold start repair kits)
• Thermo time switch
• Fuel Pressure acumulator
• Leaky fuel hose

 

Thank you both.

 

Yes North American . Which relay we talking ? I know search is supposedly your friend but sometimes for me it isn’t. Saw a diagram a few years ago when I replaced a cooling fan relay but can’t find same diagrams now.

 

Paul Bennett do sell proper diagrams for a small fee.

http://www.paul-bennett.com/Ferrari/

 

I've highlighted the relay P location from my prior post:

If you have a US version 1980 308 GTSi = try a different ...101 relay in the relay P (Relay for start injector) position. Relay P is in the bottom row on the far right side. You can temporarily "borrow" a ...101 relay from one of the headlight functions for a test. Relay P should really be called the "Relay controlling the Fuel Pump Relay".

 

Also, you didn't clarify -- is this is for all starts (cold or warm) or only just warm restarts?

 

It has always started right up for 15 years. Then, about two years ago it began not wanting to start when the safety switch was plugged in. Cold or warm. Now it’s starting after several attempts cold or warm. Not really thinking it’s an accumulator problem as it’s cold and hot hot issue at this point. Was wondering if the same thing that caused the safety switch to go bunk may be same thing causing this. Been going through extenders and wires and looking at rotor arms in the distributor etc as possible problems. Put a little fuel stabilizer in gas and a little fuel injector cleaner in too. I replaced the injectors on the rear bank a few years ago. I added a ground to the Marelli boxes. Stuff like that so far..

 

Definitely try another relay P as the first diagnostic test.

 

Can

will do!

 

Been searching for an hour online. I guess you’re talking about the far left bottom metal Bosch 113 relay right? Replace or switch with one of the top row ones with same 113 number on it?

 

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Ah dyslexia kicked in. Far right. I see..

 

Yes, "far right, bottom row" -- it's a ...101 relay. Do you have the OM for your car? Very good diagram in the fuses-relay section with the relay letters.

 

101 not 113

 

Yes I have OM. Just switched the lower right 101 with the one above it. Did start after about 4 attempts . Noticed pump fuse (original crappy fuse block) was hot after so many attempts. Still didn’t want to rev tho.

 

Fuse cooled after car idled for a minute

 

Hey -- no fair changing the symptom! Your first post stated just a problem starting, but no runability issue (once started). If it's just generally running crappy (in addition to being difficult to start) = that's more of a Bosch CIS problem somewhere. See Chapter D of the 281/83 Mondial8/QV WSM -- a much more complex issue to diagnose.

 

Just wondering if the same thing that started the safety switch thing was doing this too. Will keep looking for clues. Thanks

 

Appreciate the advice. Maybe time to take her in in fresh non-ethanol gas doesn’t help.

 

Actually my manual shows the fuel pump relay in the far right side H.

 

Far left H
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