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Discussion Starter #1
Hi there

Only had my Alfa 156 3 days when she died on me, there was a dead spot in the rev's around 1500 - 2500 when she was cold I could get her started no problems but once she had warmed up there was no chance off her starting again or she would cut out, At 1st I though must be a spark plug or coil as I was sure you could hear her miss fire... Anyway took her to a local gargage to get her diagnosed on the computer properly.

The diagnostic showed 2 faults Mixture control & Mass air flow sensor after checking the gargage found the air flow sensor faulty the replace this as well as all the spark plugs and clean the coils as the were a little corroded, at 1st the air flow meter they fitted didnt do the job but then they upgraded to a higher quality one and this has worked. WHen you rev her she now has no dead spot when stationary.

However after leaving the garage this doesn't seem to have solved my problems every now and then when driving I seem to be getting a dead spot It only ever happens when I'm in low rev's like when in traffic or pulling off, theres just a dead spot in 1st or 2nd gear around the 1500-2000 rpm range.

Does anyone have any ideas?

What could be causing this?

Is it a fuel supply issue?

Oh its worth mentioning that the air flow senosr they used is a brand x one and not an Alfa one does this matter?

Anyway guys all your input will be really appreciated it would be good if I could go back to the garage with some info at least!

Ta

McCoy
 

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In my personal experience you need to be using a Bosch MAF, i tried a cheaper one with my V6 and it was a total waste of money. Do you know what make the one they used is?
 

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Discussion Starter #3
Unfortunately not, just out of interest is it hard to fit this part ourselves or does it require a garage, my father has been a mechanic & engineer for over 40 years but he is reluctant to work on my Alfa as he knows nothing about them and they seem quite specialist mechanicly?
 

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I am hopeless with cars and even i changed my MAF in a couple of minutes, as far as i remember it is just 1 connector and 2 torx screws?
 

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Hi mate change the lambda sensor, about £70, the lambda and the air mass meter work in correspondence with each other to send the right amount of fuel through. I had the same problem with my 156 1.8TS and changing the airmass meter worked for a while but then slowed off until I changed the lambda sensor, its now fine. Please make sure you get the correct lambda sensor as there are literally 100's to choose from, the wrong one will create problems!
 

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Discussion Starter #8
You know what I reckon thats it!!! You've got it spot on when they did the diagnostic they said it was coming up with a fault on the Lamda sensor, but thay had noticed that the front exhaust box had been change recently and thought it maybe the guys who fitted that had knocked the sensor or not reset the fualt on the cars computer. But that makes sense...

How easy is it to change the Lambda sensor myself?

Not really got much faith in this garage anymore...
 

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Its pretty easy to do, if you look under the car on the exhaust you will see a sensor sticking out with a spanner nut thing with a wire attached, take this off and replace it, that's the lambda sensor. This may need heating up to take off as some are very tight. Again, make sure you get the correct one.
 

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There is a set of digits on the sensor, use these, failing that ring the dealer they should be able to get it from your car registration or at least tell you how.
 

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Look it up on the Bosch parts catalogue ... http://ecat-online.bosch.de/toc/

It will list two:

0 258 006 190 is a straight swap with new cable and plug.

0 258 986 615 is their Universal part and needs to be connected into the existing wires from the lambda socket using a wiring block supplied with the kit. Also known as LS615.

1.6, 1.8, 2.0 all use same Lambda and it's also used on different models with same engines 145, 146, 166, etc. They are also used on different manufacturers (Audi, etc), so if you have trouble finding one at an Alfa source, you could try them or even a Bosch outlet.
 

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tried disconnecting MAF sensor on jack today,made him very,very poorly,so don`t think it`s that,seems to get worse when he`s hot,still can`t track down 3 pin water temp sensor though,any clues peeps?was kangerooing so badly earlier,that my `oh,my god i`m so funny` 18yo old started singing `tie me kangeroo down sport` until i gave him the stare of death!:rant:
 

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Look it up on the Bosch parts catalogue ... http://ecat-online.bosch.de/toc/

It will list two:

0 258 006 190 is a straight swap with new cable and plug.

0 258 986 615 is their Universal part and needs to be connected into the existing wires from the lambda socket using a wiring block supplied with the kit. Also known as LS615.

1.6, 1.8, 2.0 all use same Lambda and it's also used on different models with same engines 145, 146, 166, etc. They are also used on different manufacturers (Audi, etc), so if you have trouble finding one at an Alfa source, you could try them or even a Bosch outlet.
Im just lookin on another site now, BOSCH, and they have come up with part number 0258006376, what that code for, they're saying 1.8 TS, is this right? Cheers
 
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