Should do -- but remember, you're not after the blue one, but t'other one.

fingers99 said:

Should do -- but remember, you're not after the blue one, but t'other one.

Click to expand...

Think it is p/n 7588802, quite widely used by Fiat.

About £18 for a new one (so don't pay more for a s/h one...!!)

Cheers for the info guys!

Hi Chaps, just fitted a replacement complete throttle body today, and the result.....exactly the same as before! just not wanting to start until the engine is absolutely cold. I checked the plugs, and they were dry and very light grey, when your cranking there's no sound coming from the injector(which makes a clicky sound when running) and the only way it will fire up when hot is if I either spray Cold start spray or pour a small amount of petrol in the top of the throttle, the simple thing is it doesn't seem to be getting any petrol when your cranking, but is getting petrol once fired up, plus it idles a bit faster than it should. Any further ideas guys? Is it the ECU, or sucking air, or perhaps a dodgy crank sensor?

If it's the crank sensor there will be no spark and no fuel past the injector when conked and cranking.

I'd suspect a poor wiring connection to the injector itself. Trace back the wires. Unlikely to be the ECU -- they're pretty much bullet proof on the SPI cars.

Thanks "Fingers 99"
So, by you'r reply, there could be a poor connection at the injector plug or in the wiring to the injector plug?
If so, how would I go about testing these?

I'd be inclined to do it visually at first. For the injector to "fire" sometimes, but not others, there's got to be something pretty obvious. Just strip back the sheathing, take a peek.

Thanks "Fingers 99"
But if it was a loose connection to the injector I would be getting the same starting problem when the engine is cold, and it starts from cold after cranking for approx 6-10 seconds without fail, it's just when the engine is hot that the starting is very difficult.
For testing purposes, what is the voltage at the injector that the ecu tells it to run at meant to be? Thanks.
Bill

i'd be getting out my compression tester at this point - just to be sure its got good compression.. It should start pretty much straight away cold or hot, 6-10seconds is alot.

other thought would be how quickly is it turning over? dying battery or starter.

Not really saying it is any of them but i would want to be sure its not before i went investigating further.

It cranks fast, and the battery is fairly new. To give you a scenario, one morning a few days ago, it had been raining all night and it was a chilly morning, Cinqy started first try, went to work no probs, Cinqy was parked up for 12 hours, by then it had been a warm and dry day, Cinqy took 2 or 3 trys before he suddenly fired up, got home without drama, parked up, switched off engine, tried to restart, no chance! When driving along it runs no problem, no misfiring, no cutting out, no loss of power. Hope that gives you an idea of what it's doing. But I will check the compression on all cylinders just to eliminate that from the situation.

Hi all, does anybody know what voltage the fuel injector runs at, I tested it recently and when the engine conks, the voltage reads 0.72 volts, which seems hardly enough to make a L E D bulb glow! Is this normal?

With engine conked, I'm not sure I'd expect any voltage. The injector won't fire unless the ECU believes the engine is turning.

Hi "Fingers 99" last week I tested the voltage going to the injector whilst cranking after I had warmed the engine up and the voltage at the injector plug measured 0.72 volts, no wonder it's difficult to start if there's hardly enough voltage to fire the injector, so I was wondering what voltage the injector is supposed to run at when the engine is turning over? Also, do you think that I may have a dodgy fuel injector relay?

Check the wiring diagram -- but I don't think there is a fuel injector relay or even a fuel pump relay in the 899.

I'd not get carried away with voltages. If there is no fuel getting past the injector and no spark, TDC sensor. (although it could be the air gap, etc.).

Otherwise look elsewhere.

I don't know the voltage, or how you're measuring it. But remember that the injector is actually fired on the earth side. Worth tracing back the + ive side.

Ok, thanks for the info.
Regards
Bill

fingers99 said:

Check the wiring diagram -- but I don't think there is a fuel injector relay or even a fuel pump relay in the 899.

Click to expand...

100% there is a fuel pump relay. It is the relay the guide for fitting a rev-counter points to...

Hi all, still working on the starting problem with my cinq, I've replaced the crank sensor, but it's still no different, and to make matters worse now it won't start even from cold, all it will do is fire but not run. I've checked the fuel flow, and there seems to be plenty getting to the throttle body, but when I checked the spark, the plug was firing very erratically, firstly I am thinking I could have a faulty coil pack, but on the other hand I'm also thinking that there could be a fault with the ecu, if so, what's involved in replacing it?

Cento78 said:

also thinking that there could be a fault with the ecu, if so, what's involved in replacing it?

Click to expand...

unlikely, its almost unheard of the ecu on these failing

I'd go leads, plugs, coil packs. BUT! Do note that on the 899s it's easy peasy to bugger up the placement of the crank sensor when replacing it. IIRC, there's some stuff on how to do it correctly in the Haynes Cinq manual, probably something on how to re-set it in the Seicento Technical Manual (in the Downloads section). (899 engine is identical Cinq and Sei.)

ECU issues on the SPI cars are very rare as Blue says.

Ok thanks guys, thanks for the info!