General Uno Fire`88 wont start. Injection fault?

[Andreas]

Hi to you all. I`m new to this forum i might say. I bought my Uno yesterday from a friend at work. My problem is this;
This morning it just wouldn`t start. (It ran 100% the day before and fired up after a milisec on the startermotor.)Some starterspray in the airfilter didn`t help.It didn`t fire up. I`ve checked the cables and the usuall ignition parts,all OK. Afew starterspray-sessions later it ignited but only ran for 1-2 second and then at BELOW idle speed(it hardly had power to turn itself around!).
So im not sure if the injector itself is spraying enough gas in it. Why then? i`m not to shure on injection,all my other cars was of the carb-type u see.
Oh yes,its a Uno `88 with 45hp Fire engine,Mono-jetronic.

 

[Morty Mort]

Heisann.

Actually, it might get too much fuel. When the car idles, the injector should pump half the amount of fuel into the engine. Try to start the car, and let it idle. Open the bonnet and try to push the throttle cable backwards until it hits an "idle button" around the injection unit. You cannot make any adjustments to this unit - I think. My car (1.1i.e) stalled when idling also, and this was part of the problem. I loosened the throttle cable a bit and found an adjusting screw to hit the "idle button". And it worked...

Your car might also be running on three cylinders. Unscrew the plugs. You might have to remove the airfilter box. You should do this anyway when making the above adjustments, to see if there is some dirt plugging the lever in the injection unit. If it is blocked, the car will again get too much fuel when idling, making it stall when stopping at a red light. And that's VERY annoying, I know. Back to the plugs. They should be light brown. Use some sandpaper on them and put them back, with low torque.

There might be other solutions, but try this first, they don't cost you anything but time.

Hilsen Morten.

 

[John H]

My {Bosch) injected 999 FIRE Panda was stubborn to start from cold, and would "tick-over" at a very slow speed, and eventually clear with lots of petrol smell.

I found it would start more easily by depressing the throttle a little bit when cranking.

Eventually I found the throttle body and butterfly valve were all gummed up - cleaned it up and it is a lot better.

AIUI the problem is that there wasn't enough air getting past the muck, so the mixture was too rich at the point of trying to start. (using the ECUs guess at throttle position).
Because this over rich mixture wasn't igniting/burning properly, the lambda sensor saw the extra air in the exhaust and the ECU gave more fuel.


YMMV.


But try starting tomorrow with the throttle down a bit - see if it helps..