Loss of power 159 JTDM 1.9 16v - Alfa Romeo Forum
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Loss of power 159 JTDM 1.9 16v

Hi there, I was hoping for some diagnosis help. I have a 2007 159 JTDM 1.9 16v. Yesterday I pulled up at the lights, and as I tried to pull away I heard a rattling sound coming from the engine bay. There was a trickle of power but foot to the floor in first I was struggling to get enough revs to engage 2nd gear. So there was an immediate loss of power rather than a gradual one.

Turbo pressure gauge wasn't getting above 0.8bar at 2500 revs in second gear, and I didn't notice the turbo pressure gauge go any higher than that.

There were no warning lights what so ever (apart from front side light and parking sensors – Is there a limit to how many faults can be displayed? So I limped home.

My initial thoughts were obviously turbo related, but after reading a few threads could it be EGR or MAF sensor (MAF was replaced a few months ago)

I would appreciate any help anyone can offer me.

Oddsock1970 is offline  
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It could be vacuum leak, check if you are getting vacuum in and out of the vnt valve.
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Check out the diesel power loss guide in the stickies, work your way through that!

Any spelling/ grammatical errors are purely there to annoy!
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