Fuel Injection Relay
08-29-2012, 03:20 AM
#1
Intermediate
Thread Starter
Fuel Injection Relay
1982 928. I have a faulty Fuel Injection Relay. I have ordered a new one. In the meantime I would like to drive the car. Is it safe to add a jumper wire. If so what two slots do I jump? Thanks!
08-29-2012, 11:46 AM
#4
Nordschleife Master
you have an early car and need a 3 wire jumper,
It would be safe to drive, but not recommended, you can however modify a bosch or hella 5 pin relay to work the same as the fuel inj relay.
It would be safe to drive, but not recommended, you can however modify a bosch or hella 5 pin relay to work the same as the fuel inj relay.
08-29-2012, 12:27 PM
#5
Intermediate
Thread Starter
Do you know which 3 slots to jump? I tried most of the other relays in the car and none worked. The schematic on the side is different with two #87's and an open switch operation.
08-29-2012, 12:30 PM
#6
Rennlist Member
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You need to jumper from 15 to both 87 terminals. There are some safety issues, so this is not a recommended technique for driving except in emergencies - very useful for testing, though.
08-29-2012, 12:58 PM
#7
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NEVER EVER try most of the other relays !!!! Unless you KNOW it is the same relay do not try plugging one in to see what happens because you can easily burn things up. If you have the old relay you can as a test pull the cover and wedge the points together with a toothpick but not a good FIX . Just a way to get home if stranded.
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08-29-2012, 01:06 PM
#8
Chronic Tool Dropper
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There are aftermarket fog light relays configured with both 87's. Try your local parts place and look in the universal help parts electrical rack. Most of these aftermarket relays are less than stellar quality/durability, so I wouldn't plan on using one for any extended mission-critical service like FI, but it might get you out of a bind for the short term.
Using jumpers and not getting them out in time leaves a risk of filling the engine with fuel. Except for very controlled testing or for an emergency that will just need to get you home once, a jumper for this or fuel pump service is way dangerous. Better option would be a standard 53B relay in a socket, with pigtails fitted with crimp-on spade connectors that can plug into the panel. If you can't find the fog light relay described above.
Using jumpers and not getting them out in time leaves a risk of filling the engine with fuel. Except for very controlled testing or for an emergency that will just need to get you home once, a jumper for this or fuel pump service is way dangerous. Better option would be a standard 53B relay in a socket, with pigtails fitted with crimp-on spade connectors that can plug into the panel. If you can't find the fog light relay described above.
