Injector(s) wont fire 89 veloce - Alfa Romeo Bulletin Board & Forums
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post #1 of 2 (permalink) Old 06-14-2007, 08:33 AM Thread Starter
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Injector(s) wont fire 89 veloce

Ok, so I thought I had a bad injector due to the fact that the car ran poorly and I could unplug it while the car was running and it didn't make the idle change at all. Well, I replaced it with a known good one and guess what? It still doesnt run right.

I now suspect wiring issues, and tracing back from the plug on the injector I find two three prong connectors bundled together. One is all black, the other is black on one side and silver on the other. SO when I unplug one of them the car dies instantly, but when I do the same with the other nothing changes at all....

Any ideas how to troublshoot this? should I also check the big connector on the ecu (which I assume is in the passenger side kick panel)

--AaronAlfa---Mill Creek WA-----
91 164S (Engine & Parts for sale)
91 164L Auto (Parts for sale)
84 GTV6 (In the doghouse this week)
94 Audi V8 Quattro (Guzzles gas, but oh so comfy)
94 Nissan Skyline (Car speaks for itself)
03 Saab 93 Viggen (The reliable one)
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post #2 of 2 (permalink) Old 06-14-2007, 10:19 AM
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Location: Mebane, NC
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I almost bought a new injector thinking I had a bad one, too. It turned out that it was really an air leak at the intake plenum. The air leak (loose hose) must have affected the #1 cylinder much more than the others (it was closest to #1) causing that cylinder to run so lean that it seemed like the injector had failed.

Here's a link to more about that issue: embarrassing confesion

You could be right about a wiring issue. Oft times the small terminals inside the Bosch connectors loose their spring tension or get bent or move out of position. Look real close - make sure that the male spade isn't bent over (thus failing to make a connection) and that the female terminal grips tightly (you can use a tiny screwdriver - a jeweler's screwdriver - to re-bend the connectors to ensure a tight grip) . Also make sure that neither terminal is loose inside the connector. Gently tug on the wire harness and see if the terminal inside the connector moves (it shouldn't).

The connectors you mention - one 'silver' & black - might it actually be grey & black? I think you may be looking at the flywheel sensor connections. There is info in the Spider L-jetronic diagnosis page about them and how to test them. Make sure you understand what's involved. Doing it wrong could fry your car's ECU (computer).

- - Eric
don't read this
~ 1984 Spider Veloce ~
- -~ 1981 GTV-6 ~
Mebane, North Carolina

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