Indexing position of Injectors - Alfa Romeo Bulletin Board & Forums
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post #1 of 12 (permalink) Old 01-17-2019, 10:38 AM Thread Starter
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Indexing position of Injectors

I have the fuel rail with injectors off the 85 Spider. In a previous post "ghnl" suggested sending the injectors out to Cruzin Performance for servicing. Cruzin looks pretty good so unless somebody has another suggestion that's where I'll send them.
The manual says to check the position of the connector on the injector. They are cocked a little compared to exactly straight up. Is that what there referring to or is there an indexing mark on the injector to look for. I don't want to take the injectors apart until I'm sure of this. Thanks in advance for any advice.

WARNING:
Prior to replacing any injector, check
the position of the connector on the injector
in order to achieve the same position
when assembling the new injector.
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post #2 of 12 (permalink) Old 01-17-2019, 10:56 AM
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No, there's no indexing mark. Just install them so the plug is pointing mostly up so you can plug them into the harness once the rail is installed.
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1963 Giulia Spider (1750 engine)
1974 GTV
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post #3 of 12 (permalink) Old 01-17-2019, 11:17 AM
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I think the "indexing" refers to this:
if you look at your injectors in place on the engine, they are in fact not all straight up.....some of the injector plugs (at least on my S4) are very slightly 'off upright', so angled a tiny bit left or right..... which allows the connectors to fit back on as they came off on your particular car.
Some of the injector wires are fairly tight, there is not a lot of movement, especially as their original suppleness after 30+ years is way past its sell by date

so, as Tom says there is certainly no indexing mark, but they are not 'necessarily' all facing up dead straight....as he says "mostly up" is probably the correct term here.

it is just something to ease the refitting of the connectors to your particular car

that is what I think the manual is referring to, as indexing.

hey, I might be wrong, but I remember asking my injector service place to put them back on exactly as they came off the rail.

Dom - Alfa Spider 1990 S4 - formerly: Alfa 101 Sprint, 2600 Sprint, Montreal - family classics: Jensen Interceptor II, '58 Hooper RR Silver Cloud I, Shadow II, '60 Corvette.
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post #4 of 12 (permalink) Old 01-17-2019, 12:18 PM
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I agree with the above. You just need to align the injectors in the general direction needed to reconnect the wire harness plugs.

- - Eric
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~ 1984 Spider Veloce ~
- -~ 1981 GTV-6 ~
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post #5 of 12 (permalink) Old 01-17-2019, 01:39 PM
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I wouldn't bother removing the injectors from the rail. I would just send the entire fuel rail assembly (with the 4 fuel injectors AND the Cold Start Injector still attached) to Cruisin as a complete unit. They will check, test, and service (if necessary) all 5 injectors and replace them with their power connectors in the same exact position as they were in, and probably replace the feed hoses too.

Edward
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post #6 of 12 (permalink) Old 01-17-2019, 04:43 PM Thread Starter
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Thanks to all for the advice. I took good closeup pics so I can see how they're off center a little. I already took the injectors off the rail with the "welder" like the manual showed. Now I wish I had left them on like Norseman50 suggested. Should I take the injectors apart (flange, gasket, circlip, O-ring) before sending them to Cruzin?
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post #7 of 12 (permalink) Old 05-11-2019, 02:16 PM
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How the heck does one remove the fuel rail from the shock mount? The nut on top of the bracket appears to be welded in position. It is square and looks like a wrench won't go on it or turn it!

87 spider grad, 06 audi cab, 12 prius, 79 bellanca viking
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post #8 of 12 (permalink) Old 05-11-2019, 03:29 PM
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Quote:
Originally Posted by mgsteve View Post
How the heck does one remove the fuel rail from the shock mount? The nut on top of the bracket appears to be welded in position. It is square and looks like a wrench won't go on it or turn it!
You have to unbolt the nut on the bottom, below the plenum-support strut. Then leave the shock mount attached to the fuel rail as you remove the fuel rail as a whole. When it is out of the way, the shock mount will just screw out (if you need to replace it).

Rich

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'17 Giulia Ti Sport
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post #9 of 12 (permalink) Old 05-11-2019, 05:37 PM
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Sloboy, thanks for the reply. Can you access the nut under the bracket without removing the intake plenum?

87 spider grad, 06 audi cab, 12 prius, 79 bellanca viking
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post #10 of 12 (permalink) Old 05-11-2019, 05:46 PM
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Quote:
Originally Posted by mgsteve View Post
Sloboy, thanks for the reply. Can you access the nut under the bracket without removing the intake plenum?
Yes, but putting it back on is another story.

Richard
76 Alfetta GTV gone to rust haven, 89 Spider the red graduate, 86 GTV6 on wish list
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post #11 of 12 (permalink) Old 05-11-2019, 06:00 PM
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It is one of the many nuts/bolts you have to access by feel. Here's a photo of the underside to give some sense of what you're trying to feel.

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- - Eric
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~ 1984 Spider Veloce ~
- -~ 1981 GTV-6 ~
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post #12 of 12 (permalink) Old 05-11-2019, 07:11 PM
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Quote:
Originally Posted by mgsteve View Post
Sloboy, thanks for the reply. Can you access the nut under the bracket without removing the intake plenum?
It is either 8 or 10 mm. I use a 1/4-inch drive deep socket as I feel around from the front of the plenum.

Rich

'85 Spider Veloce
'17 Giulia Ti Sport
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