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Discussion Starter · #1 ·
A few times since I got my car, the injection system malfunction light has come for a second or two. I did'nt put much pass on it, because it would always go off !

I have also been having a problem whereby the car engine would stutter for a split second. This has happened a few times, but I wasn't too concerned and figured I could live with it (until it got better or worse).

However today (for the first time) both problems happened together !!!
The car stuttered (jerked) and the light came on at the same time, but only for a second !

I would imagine it is possible that the stutter is caused by fuel problems and maybe the light is just confirming that I have a problem with my injection system.

Has anybody got any ideas ?

Thanks,
Ger.
97 155 2.016v TS
 
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Discussion Starter · #2 ·
Hi,

This does sound like your injectors are blocked or 'fowled'. Your first step (if you haven't already tried it) is to invest in a good injector cleaner available from most car accessory shops (Halfords etc).
I have used this to good effect in a previous Alfa of mine, and it invloves no more than adding it to your fuel tank, it can also be bought in spray form to add directly into your air intake/meter.
Alternatively, if this doesn't work, most garages offer a service to clean the injectors directly.

Hope this helps,

Regards,
A.H
 
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Discussion Starter · #3 ·
Thanks for the reply Alex.

Any recommendations for a good Injector cleaner to try. Are they really any good ?
I recall seeing an advert and there was two types, one for cleaning first, and another for continued maintenance.
Whats the diffenence with them ?

I suppose its a cheaper enough first step to try !


Ger.

PS. did it fix the problem in your previous Alfa ?
 
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Discussion Starter · #4 ·
Well, I've tried about three different ones.

Redex are probably the best known but also STP or the last one i tried was Slick 50 (there are loads others) they all do pretty much the same job of clearing the muck from your injectors and also cleaning the fuel lines.
Redex are probably the one you mention as it is more concentrated, and you use a certain amount to begin with followed by smaller amounts every so often for continued maintenence.
Most however are a 'one shot treatment' ie you pour the whole bottle in - but read the instructions first!
My previous Alfa (a 33) had some poor running from time to time and i recall i used STP, and yes it did seem to make the car run better. But you're probably best using one make and sticking with it. I usually make a point of using the stuff every few thousand miles whether i have problems or not - a sort of preventative maintenence.
You could also try the spray type in the air intake. I think the intervals tend to be around 5-6k miles depending on which make you choose.

Something i forgot to mention, Does the car seem to hold back temporarily? (usually under hard acceration) If so you could have a problem with your air-flow meter, this can cause the car to stutter badly or even cut-out (another problem on my previous 33!).
So if you still have problems get that checked out. As with all problems of this nature it's trial and error!


Regards,

A.H
 
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Discussion Starter · #5 ·
Hi
My father-in-law had the same problem with his Vauxhall Cavalier 2.0 16v. Eventually he lost all power and it died. This was traced to a sticking airflow meter. It was cleaned out with carb cleaner and all was well again.
just a thought

Mike
 
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Discussion Starter · #6 ·
Your problem may be due to a faulty Lambda sensor. From previous posts I have seen a lot of complaints of these sensors failing.
Have it checked before you replace it, as they are not too cheap.
My 2L 16v had basically the same (intermittend) problem: The engine seemed to lose power for a second or so, almost like a misfire, but no popping. The injection light also came on.
Maybe unplug the sensor first for a few days to see if the problem still occurs. Just a suggestion.
After replacing my Lambda sensor my car has been running fine. It seems these problem are sometimes difficult to trace. By the way, the "Examiner" computer at my agents didn't show the Labda to be faulty.

Good luck.
 
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Discussion Starter · #7 ·
Thanks for the replys guys,

I'm currently running with a tank full or petrol & redex injector cleaner. So fingers crossed I'll notice a difference.

In the event that I don't, how does one unplug the Lambda sensor ?
What does it do, and if unplugging it makes the problem go away, why not leave it unplugged ?
 
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Discussion Starter · #8 ·
Hi gjmassey,

Yeh I reckon it may be Lambda sensor, a friend has a 1996 155 2.0 valve and has had 3 fitted its only covered 58k and injection light always comes on like yours!

If you find it is, get a quote on replacement then look at www.tancbarratt.co.uk I think the last one he bought there was about £30, I don't understand this myth with Lambda sensors being £100 + I've heard it numerous times too, you've got to shop around I guess!


Hope its just clogged up injection system though :D

Cheers MAK
 
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Discussion Starter · #9 ·
Hi all
Have anyone checked the fuel filter, service staff often forget to replaced it servicing the cars.
The Lambda sensor measures the exhaust’s amount of oxygen and temperature at the Lambda by a electrical current to the ECU which adjusts the fuel mixture accordingly. In order to function (clean the exhaust gasses) the Catalyst Converter’s (Cat) temperature have to be around 400C and a certain surplus fuel amount in the exhaust, i.e. then the temp is below 400C fuel mixture is managed in accordance to engine coolant and inlet air temp (like no Cat is fitted) and above 400C fuel mixture is a bit richer than is needed for optimal engine performance (used by the Cat to clean the gasses). Removing (the leads to) the Lambda will upset the ECU on newer ECU versions – I have tried it on my 155 16V but ran my former 33 without Lambda and Cat for year with no ill effects.
Alfisti regards
Erik
 
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Discussion Starter · #11 ·
I have just finished my tankfull of petrol / redex injector cleaner.

The malfunction light is coming on more now than it was before. When the light comes on, the engine starts stuttering / spluttering, but it usually only lasts for a few seconds, then disappears for a while.

Could it be a problem with the fuel supply (as suggested above), would this cause the light to come on ?

Any ideas ?
Ger
 
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Discussion Starter · #12 ·
Hi Ger
An authorized or well-equipped specialist Alfa repair-shop will with their laptop and program (CD) for your model be able to diagnose your problem, usually they charge a fix price for such a test.
Good luck finding the problem
Alfisti Regards
Erik
 

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2,849 Posts
Hello again Guys,

Nice to see the site back up & running again.

Back to ECU/Lambda/hesitation problems. A long whie back I posted similar problems with my 96 V6 and had all sorts of ideas. I swapped AFM, replaced Lambda (which did cost £100 from Alfa), checked every single wire in the ECU loom, stripped and cleaned PCV, looked for leaks, tried injector cleaner etc etc etc. Nothing helped, light came on more and more, car hesitated more and more. Eventually, I tried yet another new Lambda (this time £40 from a local factor). Hesitation went away, light stopped coming on (for about 2 weeks). Then I went on a decent run and got 36mpg. I had never got better than 28 before. I still see the warning lamp from time to time but I don't let it bother me.

So, change the Lambda first and hope it's a decent one!

ChrisS
 

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1,134 Posts
I agree with jaques and the others mentioning the lambda sensor - I have had first hand experience of the same symptoms as you're getting, so had to have a new sensor. Unfortunately for me, I had it done at a main dealers and it cost £80. There used to be a link on this site for somewhere that did them from £25! I'll let you know if I find it.
 
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Discussion Starter · #15 ·
Hi all.

I believe the site for Lambda Sensors and replacement cats is www.fuelparts.co.uk.

Althoulgh I dont know if they are £25 but they're considerably cheaper than main dealer.

Hope this helps

LesPix
Not in the register yet
155 TS 2.0 16v :D
 
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Discussion Starter · #16 ·
Hi all.

I believe the site for Lambda Sensors and replacement cats is www.fuelparts.co.uk.

Althoulgh I dont know if they are £25 but they're considerably cheaper than main dealer.

Hope this helps

LesPix
Not in the register yet
155 TS 2.0 16v :D
 

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6 Posts
Hi GoodPeople

My Alfa 166 injector light does not come ON at all on the dash.We checked the injectors on the engine still there is no spark. And the Key code is ON. My Mech programmed the Key and the light went off.however when i try to start the babie just cracks and finally the Key code light come back ON again.This happed aftr jump starting,Please shaired some light it has been weeks now.:confused
 
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