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Old 26-07-2010   #1
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Red Injector warning light comes on.

I have recently purchased a 1999 Fiat Seicento 1.1 Sporting. The car has been perfect for the first three months with no problems at all. A problem has now suddenly occurred. When first starting the car from cold and running it all is well but once I stop and restart a short time later the red injector warning light comes on and the engine runs rough. The crazy part is if I leave the car for an hour or so it starts and runs perfectly until I stop an quickly restart again. Can anybody suggest what the problem is?
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Old 26-07-2010   #2
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Re: Red Injector warning light comes on.

sounds like a temperature issue check temp sensor
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Old 26-07-2010   #3
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Re: Red Injector warning light comes on.

Quote Originally Posted by dronenrs View Post
sounds like a temperature issue check temp sensor
Thanks for that dronenrs, do you mean the water or the air temp sensor?
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Old 26-07-2010   #4
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Re: Red Injector warning light comes on.

water temp sensor. by the sounds of it it always thinks its hot so is putting less fuel in but when up to temp itll be fine
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Old 26-07-2010   #5
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Re: Red Injector warning light comes on.

More likely the water sender (in the inlet manifold), but if not check the air temp one too.

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Old 27-07-2010   #6
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Re: Red Injector warning light comes on.

Problem is now more serious the car won't start at all (no spark at all 4 plugs). Fitted new plugs, new HT leads and new coil units but still no spark at all! Any ideas?
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Old 27-07-2010   #7
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Re: Red Injector warning light comes on.

i'm gonna go out on a limb and say its starting to sound like a fault with the ECU check the ECU earth if im wrong someone will be along shortly to correct me
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Old 27-07-2010   #8
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Re: Red Injector warning light comes on.

could be coil wiring if no spark... test the coils

feed the positive with 12v then take it of. it should kick out a spark as you take the feed away. if it sparks you know your coils aint shot check wiring and report back
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Old 27-07-2010   #9
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Re: Red Injector warning light comes on.

Coils are fine.
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Old 27-07-2010   #10
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Re: Red Injector warning light comes on.

the coils themselves may be fine but the wiring to the coils may be faulty
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Old 27-07-2010   #11
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Re: Red Injector warning light comes on.

What is the best way to check this wiring?
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Old 27-07-2010   #12
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Re: Red Injector warning light comes on.

Quote Originally Posted by richydraper View Post
could be coil wiring if no spark... test the coils

feed the positive with 12v then take it of. it should kick out a spark as you take the feed away. if it sparks you know your coils aint shot check wiring and report back
mentioned about 3 posts up
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Old 27-07-2010   #13
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Re: Red Injector warning light comes on.

I have removed the low tension plugs from the coil packs and checked the voltage across them with the ignition switched on - nothing. No power is getting to the low tension windings of the coil packs which might be the wiring loom or something more expensive!
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Old 27-07-2010   #14
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Re: Red Injector warning light comes on.

Crank sensor?

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Old 28-07-2010   #15
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Re: Red Injector warning light comes on.

I have cleaned the earth connection to the ECU but still no spark. Can you please tell me where to find the crank sensor?
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