Injectors

[Godfath]

Injectors won't fire

[Landseer]

Anything else you want to add?

[harborman]

Originally Posted by Godfath

Injectors won't fire

Like he said, anything more to describe?? Guys are willing to help but they are not mind readers.

[Landseer]

6 posts spread out over a month.

Nothing but this cryptic message and model year designation.


Sell the car.

[MPDano]

You guys are fast this morning. Maybe give the guy a chance to respond and finish that cup o coffee first?

[Pete R]

Originally Posted by Godfath

Injectors won't fire

Then fix them.

[Landseer]

Originally Posted by MPDano

You guys are fast this morning. Maybe give the guy a chance to respond and finish that cup o coffee first?

I did on the first four posts.

Cmon, seal team assembled, stop straddling the fence

[MPDano]

Originally Posted by Landseer

I did on the first four posts.

Cmon, seal team assembled, stop straddling the fence

Ha ha!!!!

[JhwShark]

Originally Posted by Godfath

Injectors won't fire

Fire them and get some who will.....

[Landseer]

OK.
Godfath, wiring digrams that you asked me for using the visitor message function for 80 928 are in two places.

They can be found on the cannell UK site.
http://www.cannell.co.uk/928_Workshop_Manuals/1980%20Current%20Flow%20Diagram.pdf The third diagram, entitled "part 2" has the fuel injection relay, but note that it is cryptic and not properly showing the two "87" terminals within the relay.


And, the relay and fuse chart can be found by entering and digging a little bit on the 928 Specialists website.
928 SPECIALISTS ONLINE STORE - 30,000+ 928 Parts - 928 SUPERCHARGER KITS!

If your injectors are not firing on this car, it might be the injection relay on the 1980 car.

It is labeled as XVI on the top row of the CE fuse panel. Its the relay occupying 4th "position" on the top row, counting backwards from right to left. It is possible to jumper that relay using a three-ended wire with some male spade ends crimped onto them. Jumper 30 to 87 to 87a. Turn the key and it might start. The wiring diagram for that single relay position is located printed on the relay itself! So, hopefully you have the right relay to begin with. If not, let us know. (there are other tests I guess you could make to be sure there is good power to the right parts of the fuse panel first, but this will work. Careful, hot wires! sparks if you get it wrong)


You mentioned once that you didn't have a good ground to the injectors, but had 16 volts to one side.

I suspect you had only 12 volts, and maybe to both sides of each injector.

The electronic ignition system on the car works to "switch" one terminal to ground. That's how the injectors are fired. You won't normally then see a ground condition at the injectors.

With key off, no jumper...
if you unhook, and probe a single injector plug for continuity (ohms scales), you will see continuity.

Next, if you unhook the computer brain plug in the car and retry, you should see NO continuity across two electrodes of the same plug. ( IF YOU STILL do, then the problem is a short at one of the injector boots.) All the injectors are connected. All fire at once, each time the brain switches one side of the injectors ( all at once) to ground.

Hope that helps. Sorry to be such an ass initially.

Normally, a person gives just a little more information about an issue or problem, you know, some background. A little foreplay.

Hope this helps you. Check back.
Pictures would be nice, too.

[harborman]

Originally Posted by Landseer

OK.
Godfath, wiring digrams that you asked me for using the visitor message function for 80 928 are in two places.

They can be found on the cannell UK site.
http://www.cannell.co.uk/928_Workshop_Manuals/1980%20Current%20Flow%20Diagram.pdf The third diagram, entitled "part 2" has the fuel injection relay, but note that it is cryptic and not properly showing the two "87" terminals within the relay.


And, the relay and fuse chart can be found by entering and digging a little bit on the 928 Specialists website.
928 SPECIALISTS ONLINE STORE - 30,000+ 928 Parts - 928 SUPERCHARGER KITS!

If your injectors are not firing on this car, it might be the injection relay on the 1980 car.



It is labeled as XVI on the top row of the CE fuse panel. Its the relay occupying 4th "position" on the top row, counting backwards from right to left. It is possible to jumper that relay using a three-ended wire with some male spade ends crimped onto them. Jumper 30 to 87 to 87a. Turn the key and it might start. The wiring diagram for that single relay position is located printed on the relay itself! So, hopefully you have the right relay to begin with. If not, let us know. (there are other tests I guess you could make to be sure there is good power to the right parts of the fuse panel first, but this will work. Careful, hot wires! sparks if you get it wrong)


You mentioned once that you didn't have a good ground to the injectors, but had 16 volts to one side.

I suspect you had only 12 volts, and maybe to both sides of each injector.

The electronic ignition system on the car works to "switch" one terminal to ground. That's how the injectors are fired. You won't normally then see a ground condition at the injectors.

With key off, no jumper...
if you unhook, and probe a single injector plug for continuity (ohms scales), you will see continuity.

Next, if you unhook the computer brain plug in the car and retry, you should see NO continuity across two electrodes of the same plug. ( IF YOU STILL do, then the problem is a short at one of the injector boots.) All the injectors are connected. All fire at once, each time the brain switches one side of the injectors ( all at once) to ground.

Hope that helps. Sorry to be such an ass initially.

Normally, a person gives just a little more information about an issue or problem, you know, some background. A little foreplay.

Hope this helps you. Check back.
Pictures would be nice, too.

You spent more time answering this guy than he deserves. I hope he appreciates all your time as I do!!!!!!!!! You are one of the experts here in my book!