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Discussion Starter · #1 ·
i know this been covered here before,but i have tried everything
New maf and etc..

There is lack of power at lower revs and when she hits about 5k then she really opens up as she should

Its a 2.5 v6 cf2 model

Any help would be appreciated
 

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Check for any splits in the plastic flexi hose, letting too much air in after the MAF can cause all sorts of symptoms.
 

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Alfa 159 1.9 JTDm Sportwagon
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Throttle clean then ecu reset?
 

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Alfa 159 1.9 JTDm Sportwagon
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Do you have two cars as your member car says 3.0 V6 but the fault is with a 2.5V6?

Anyway we need to start from the beginning, so we can find out more.

How long have you had the car, has it just started doing this or has it got worse over a period of time?
 

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Once my 2.5 gets over 4000rpm all hell breaks loose and she wails like a banshee all the way to 7000rpm. Yes they are a little flat below that. Do you have the STR button on or off??

Mine was like this, checked and changed all the obvious like the MAF and pipes etc. but all it need was a really good run out to strecth it's legs and blow the cobwebs away, she is now running like a champ again! :)
 

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My 166, when the engine is cold, or just started, feels as if it wants to cut out. I throttle it and that seems to do the trick. I have an auto 2.5, is this the start of something that i need to get looked at, is it my MAF?

Thanks
 

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This is an interesting topic because it seems to come on a lot. I would be careful changing the MAF before getting it checked out (i.e. have an Alfa mechanic go for a drive in it). The poor MAF is being pinned on all kinds of issues on this car and I am not certain that it is always to blame.

Anyway, I am certainly no expert, just relaying what the specialists have told me. As for the power output on the 2.5, two things need to be considered.

1) It does feel a bit slower under 4000 (although I am into 6m ownership after running a Golf IV 1.6, so I don't feel it :)), but regardless it needs to "pull cleanly" all the way up of course. You should definitely feel a surge above 4000 RPM where it really bites.

2) Gearing is very low in my mind. I actually like it because it fits well with the 6 speed box, but it can also affect how the car "feels". Basically, 5th gear feels like 4th gear in all other V6s I have driven with similar power.

Finally, my car also feels a bit uninterested when cold, but that is normal with a V6, it needs to warm-up to work .
 

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This is an interesting topic because it seems to come on a lot. I would be careful changing the MAF before getting it checked out (i.e. have an Alfa mechanic go for a drive in it). The poor MAF is being pinned on all kinds of issues on this car and I am not certain that it is always to blame.
Good point. Alfa's may be unreliable, but bosch have been making some of the best fuel injection systems in business for a long time.
 

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I have a similar issue and a error code from the ECU relating to a cam sensor. Have you had your fault codes read?
Not that it helped me much....
Now I'll tell you how I fixed mine..
Left early one Saturday morning to have a look at a Mito, got caught up in the worst traffic with a queue stretching from Southend on sea to the M25 Croydon turnoff. Was severely late and hacked off.. Floored it, redlined it and put that smile back on my face. Had a bang and a sound like some belt had come loose.
After that the care was fine and has been fine since.
The noise of a belt come lose was the remained of a frayed auxiliary belt that had probably lodged itself near the cam sensor.
My mechanic is still puzzled about this self healing 166.. This incident also fixed the brake pedal stiffness.

So moral of the story.. redline and drive your 166 like you had just stolen it...
 

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I have a similar issue and a error code from the ECU relating to a cam sensor. Have you had your fault codes read?
Not that it helped me much....
Now I'll tell you how I fixed mine..
Left early one Saturday morning to have a look at a Mito, got caught up in the worst traffic with a queue stretching from Southend on sea to the M25 Croydon turnoff. Was severely late and hacked off.. Floored it, redlined it and put that smile back on my face. Had a bang and a sound like some belt had come loose.
After that the care was fine and has been fine since.
The noise of a belt come lose was the remained of a frayed auxiliary belt that had probably lodged itself near the cam sensor.
My mechanic is still puzzled about this self healing 166.. This incident also fixed the brake pedal stiffness.

So moral of the story.. redline and drive your 166 like you had just stolen it...
:lol:
 
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