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Discussion Starter #1
Hello again.

The car started doing this after I'd been tidying up the engine bay. Thoughts on what causes it? It still seems to run as normal, but as you can hear from the video it sounds rather odd when it's initially started up.

Thanks in advance.

https://youtu.be/ZwHvo3Nnbl4
 

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Discussion Starter #3
Tidy up engine bay.. Did that involve a steam gun by chance? Because you could have damaged the MAF.
Nope. Took off the inlet pipes and cleaned around them and around the base of them. Also had a look around the main intake pipe, didn't actually take it off and didn't go near the maf (assuming it's where I think it is). Fuel rails were moved about a bit due to cleaning around the inlet pipes.

That's the lot I think.
 

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I did something similar and it was down to one of the chrome intake pipes gaskets not being seated properly.
 

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Discussion Starter #7
Ah, now that sounds like it could be the solution. I found when putting them back that some really didn't like going back on, slipping on the metal. Is there a trick to make them stay whilst I put the pipe back?
 

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Now that makes sense!

Ideally, you should replace the gaskets.

You can get new ones from Alfa Workshop and Autolusso.

A smidge of gasket sealer to seat them in position before putting the pipe back on.
 

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Discussion Starter #9
Now that makes sense!

Ideally, you should replace the gaskets.

You can get new ones from Alfa Workshop and Autolusso.

A smidge of gasket sealer to seat them in position before putting the pipe back on.
Lovely. I'll try that, thanks a lot :thumbup:
 

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Discussion Starter #11
So I replaced the gaskets today, and it doesn't seem to have made a difference :(

Any further thoughts?

The car seems to run as normal, but this issue is just bugging me!
 

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Could be something else, that's not related to what you did.

Might be worth getting a diagnostic check done to see if any error codes are logged.

Could try topping the tank and some RedEx, give it a good drive if it's been stood..
 

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Discussion Starter #13
Could be something else, that's not related to what you did.

Might be worth getting a diagnostic check done to see if any error codes are logged.

Could try topping the tank and some RedEx, give it a good drive if it's been stood..
Definitely hasn't been standing around, it's used every day.

I'll get some Redex tomorrow, it'll no doubt be good for the car whether it solves my problem or not!

Regarding the diagnostic check, I don't believe I have what's required for that. What would I need? The cars a CF2, 1999 car if that helps :)
 

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OBD readers are bit basic.. Try your local Alfa Specialist for the proper AlfaDiag. Should cost no more than £25.00.

I always rinse a couple of tanks of RedEx following winter layup with standard 95 RON as that's what the ECU is mapped to.
 

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Discussion Starter #18
Multiecuscan - Diagnostics software for Italian cars

Have a read through the info. Will tell you if you can use the free version and what cable to get.
So, I've got MES working and I have the following engine errors:

PO150 - Lambda sensor
O2 sensor circuit malfunction (Bank 2 Sensor 1)

PO100 - Air flow meter
Anomaly on the inlet air mass signal (then goes on to tell me numerous things to check).

What do these mean?

Thanks in advance!
 
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