82 FI Spider intake issue

[BammBamm]

Thanks for the links. Maybe this manual will help me. Im going to double check all the contacts and wires tonight. Plus i should see + power at the injectors if i pick another ground. ( the ecu controls ground) my next question is about the ECUs i find on ebay that were from spiders.they are part number 0280000223. Mine is a 119. Will it work? I dont mind picking up a spare ecu.

[76was124]

Did you mean yours is a 191? That equates to a CU97x

[That]

I think those ECU on eBay are compatible with 85-87 model fiat. Not imported to USA. Check it out.

[That]

The ones ending '223' I mean

[BammBamm]

my ECU is 0 280 000 190. I will be testinbg things tomorrow.

[BammBamm]

So i have checked everything (i think). I have checked continuity between the ECU plug and all sensors, injectors, grounds, relay connections and coil. I have checked the resistance of the air flow meter,coolant sensor. I am unable to find a resistance spec on the air temp sensor. The dual relay operates correctly. It will only power when the ECU is plugged in. (not sure if that is normal). I have 12v pos at the injector when the ignition is on. So it is only the ECU controlling the negative.. It appears I need a new ECU. Are there any other tests I can do? Anybody have a CU97X ECU?

[BammBamm]

Can I use the 85-87 ecu? Did they change anything for those years?

[spider2081]

The dual relay operates correctly. It will only power when the ECU is plugged in. (not sure if that is normal).

The dual needs a ground to operate. Both of the relays inside the dual relay share a ground that is made through the ECU. I believe that ECU pins 16,17, 28, 34, 35 are all connected together inside the ECU. Pins 16 and 17 should be grounded with one of the bolts securing the throttle body to the intake manifold. There are 3 ground wires that are connected through the 2 bolts closest to the fire wall for the throttle body. Once 16 and 17 are grounded they supply the grounds for the Aux air sensor pin 34 and the dual relay pin 28.

I have seen the air temp sensor inside the air flow meter disconnected and the cars appeared to run with little or no noticeable effect.

The ECU's are pretty reliable units, but from reading and talking to folks it seems one of the most common reasons for changing an ECU is because the car will not start.

Have you requested a loaner ECU in the parts wanted section here. Or maybe someone in your area would let you plug yours into their car as a test.

[76was124]

Can I use the 85-87 ecu? Did they change anything for those years?

I think the 223 is for an Fiat X1/9, and I do not know if they are compatible with and 82 spider.

Also, re-reading your post from the beginning, there are a couple things not clear to me.

1. You said it runs at low idle 500 rpm and stalls. Around 500 RPM the dual relay usually starts chattering from low voltage resulting in a stall. But you said the main injectors aren't firing? The cold start injector fires for just a for a few seconds. (approx 3 seconds) Is it sputtering longer than that? If so, than at least one or more main injectors are firing. This would mean the ECU is okay( which my gut feeling is that it is). As a further test you could use a NOID light across one of the main injector harness connectors to be sure. It's sometimes hard to tell, but the light is mostly on, with a very brief flicker when the ECU fires the ground circuit. The darker the room lighting when you check, the better.

2. One of the first suggestions was to check your timing. Was that done both static timing marks and a properly adjusted distributor ( preferably using a timing light)? Take no offense in my asking, I just missed if that was done or not?

3. Along the same lines as item 2 is the ignition pick-up gapped properly? Mine loosened up on me once and had a gap bigger between the metal cam and the pick-up than it should have which caused me similar problems. I too thought it was the ECU which it wasn't

4. Just to rule it out, your plug wires ( and spark plugs) are all good and connected properly?, Have you confirmed there are no insulation break downs on the plug wires causing shorts? You would see the sparks from shorts if you are in the dark. Also check the distributor cap hasn't pinched the small ignition pickup wires inside.

[BammBamm]

The 500 rpms i spoke about is what the engine could do with just the cold start injector. I do not get any impulse signal at the injectors. i appear to be getting spark. It seems like the only the thing is to replace is the ECU. i found a couple on ebay. I will see if I can get one for a good price.

[BammBamm]

so I didnt buy the ECU when I had the chance and another is going through the roof. I did find out the 0280 000 223 is for the 85-87 spiders. Does anybody know if they changed anything? it might drop in

[bradartigue]

so I didnt buy the ECU when I had the chance and another is going through the roof. I did find out the 0280 000 223 is for the 85-87 spiders. Does anybody know if they changed anything? it might drop in

They did not make a Spider after 1985.

The ECUs are all the same, every year from 80-85 works with every other year.

[BammBamm]

Thank you gentlemen for all your help. I finally connected an led to the injectors. So i was getting pulse. So i went back to the drawing board. I looked at some pics on how the distributor should looks. I had my timing off. I moved the distributor over a couple of teeth and she fired right up. She's even peppy. There ia still a bunch to do but the major part is done. Thanks again.

[76was124]

Distributor Timing is a likely culprit.

Thanks for letting us know, nothing better than a running spider!.....looks like Pete (RRoller) wins the two door prizes. 1st to respond and 1st correct answer!