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Old 08-03-2003   #1
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Injection system warning light

This warning light came on the first time while driving to work last week, it went off after a few minutes. I looked it up in the manual and it said not to worry. However this week it came on again and stayed on until I stopped the car, it hasn't lit up again since then though. Is this anything to worry about? I'm planning a long motorway journey this weekend...
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Old 08-03-2003   #2
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I should probably say I haven't noticed any effect on engine performance when the light comes in, so I don't know whether I should be concerned.
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Old 12-03-2003   #3
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Well I've found out that it's a faulty lambda (oxygen) sensor that needs replacing which will cost 160!
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Old 12-03-2003   #4
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I was only doing 80...
 
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Buy a genuine Bosch one designed for the Punto for 60 and fit it yourself - it's only one electrical plug and you just need a 22mm (I think?) spanner. Wouldn't reccommend universal lambda sensors, I've experienced problems with them.

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Old 29-03-2003   #5
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<blockquote id="quote">[size=1] face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Originally posted by rkone
This warning light came on the first time while driving to work last week, it went off after a few minutes. I looked it up in the manual and it said not to worry. However this week it came on again and stayed on until I stopped the car, it hasn't lit up again since then though. Is this anything to worry about? I'm planning a long motorway journey this weekend...
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
iv had that problem before. i have found out that after i put in fuel injection cleaner the light likes to come on. but your car hasn't cut out yet. i took it to the garage and they said it was the egi valve that gets stuck and lets to much air or petrol in to the engine one or the other.they took it out and said i had to replace it but now it hasn't come on 4 a few months.
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Old 03-05-2003   #6
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Hi
The light came on in my punto the other day as i was driving along, i continued my journey home. Once i parked it in my drive, that was it. Now the car will not start. I've been told that the problem is related to the injection sysytem.
Anyboady got any ideas? Could this be caused by this?
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Old 04-05-2003   #7
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Andy, sounds like either a Lambda sensor problem or a sticking EGR valve (if your car has one). Unlikely to be blocked injectors, fill up with Optimax a few times, that'll help clear any blockage there may be.
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Old 28-05-2003   #8
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:)i have a problem with my fuel injection warning light the other day i done 400 miles and it came on a total of 10 times usually when travelling at a constant speed of around 70 or higher the car judders a bit then the light goes off. also what rpm are you people getting at 70 mine is around 3900 rpm its a 1.1 punto sx

thanks

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Old 30-05-2003   #9
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Hi, I've had a few probs with the injection light on my '94 55SX. After a few minutes of motorway use, the light comes on and the rev limit is reduced to 4500rpm (about 82mph). Car runs fine normally, and still pulls well up to 4500. Could this be a Lambda fault? Ocasionaly the light goes out for a few mins at a time, and the car performs fine then - in fact it's very quick for a puny 1.1, I've had 105mph out of it and there was a bit more to come!
Anyone know how to test the Lambda probe without resorting to a FIAT dealer?

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Old 30-05-2003   #10
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Hi ive got this problem with my 95 55sx, ive just had the head gasket done and now the injection light comes on every now and then and the revs drop.It wont pull more than 60mph then it will clear and be ok for a while then do it again.
Please Help!!
is it the sensor, ive taken it back to the garage and they say they cant find anything wrong , is it time to change garages
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Old 30-05-2003   #11
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BH49Q: I'd recommend you change garages - this is not normal behaviour for a car! I'm going to check my lambda sensor at the weekend, the general consensus seems to be that lambda's burn/wear ot and cause this kind of fault. And if I were you I'd change garages! Or preferably buy a good toolkit and a Punto workshop manual - this is one of the easiest cars I've ever worked on (and head gaskets are dead easy to replace yourself, I replaced one on a friend's 60S, it took me all of half an hour and 12 for a new gasket)!
(NOTE ON HEAD GASKETS: As soon as I bought my '94 55SX I re-torqued the head bolts as most of them were way out, and the head gasket has been fine since. I'd advise all you Punto owners to do the same!).

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Old 30-05-2003   #12
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Thanks Jonny Boy im going to give them one last chance as this didnt happen before they did the gasket, but came on as soon as i had the car back so i think they should fix it.Would this problem occur because of anything they did while fixing the gasket?
Thanks again
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Old 06-06-2003   #13
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hi i took my car to fiat and altho my car had the problem with the fuel ig lights coming on and going of 2 weeks ago the guy at fiat said the light should stay on and they should switch it off. so instead i bought a lambda sensor as from the fourum gave me most of the info as this hopefully is the problem. i shall let you all know what the out come is.
thanks
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Old 06-06-2003   #14
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whats this EGR valve that someone was talking about, i just got my lambda sensor and ECU replaced but my refuses to start now, even the garage dont know whats wring but they have never mention this EGR valve?????

Ali
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Old 06-06-2003   #15
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Refusing to start from cold can be a symptom of a missing sensor voltage to the ECU.

It's my understanding that the ECU will adopt "LOS" (limited operating strategy) on loss of signal(s).

While in this mode it will substitute warm engine values for the missing one(s).

For example if CTS (coolant temperature sensor) is out of limits it will assume the engine is warm, you won't get a rich mixture for starting: difficult to start, and poor cold running.

Once warmed up it will be near to normal, but not quite 100%.

You might find you can provoke it to start by giving it about 1/4 throttle when you try and start it...


All the above assumes the garage haven't broken something else [:0]


Regards


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