Lousy Behaviour - Alfa Romeo Forum
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(Post Link) post #1 of 9 Old 03-05-14 Thread Starter
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Lousy Behaviour

Come one, i just solved the broken bottom turbo hose and now i get a diffrent sympthom?!

Currently i've not many performance from the engine on bellow 2500rpm, worse after driving it for a bit if i come to a stop and engage 1st gear it starts "to lump" to climb in the rev scale, on had a nightmare when i had to go up a 25 street, had to rev to 3500 and let the clutch go...

Can it be the EGR? i've cleaned it like 8-10 months ago, not fully disassembed since it more or less moved freely...

Ideas?!


Last edited by Intimidator; 03-05-14 at 23:47.
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Could be the boost control solenoid, maybe.......
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(Post Link) post #3 of 9 Old 04-05-14 Thread Starter
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Where is that located? is the one screwed to the manifold?
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No, that would be the MAP (Manifold Absolute Pressure) sensor. If you haven't already done it, take it out and clean that.
The boost control solenoid is a vacuum device mounted on the back of the airbox. There are two pipes connected to it, one controls the actuator on the turbo. If there is a problem with the pipes or the solenoid you get the problems you describe.
The pipes (just rubber piping best replaced with nice silicone pipe from ebay) can and do split so worth checking them first before replacing the solenoid unit.
Also check that the actuator arm is moving up and down, I spray with WD40 once in a while and move the arm down - obviously with the engine turned off.

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(Post Link) post #5 of 9 Old 04-05-14 Thread Starter
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Thanks, will do that, off to check the EGR and what you call MAP.
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(Post Link) post #6 of 9 Old 04-05-14 Thread Starter
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Ok, EGR was solid shut, couldnt even push it open, gave it a good clean and it moves freely now, also cleaned the MAP but i'll be honest i think there is something missing inside, can you guys check the following image:

https://dl.dropboxusercontent.com/u/...504_152251.jpg

Isnt it supposed to have somehting else beside that sensor?!
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Oooh that doesn't look quite right
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That looks OK. There is a small delicate bulb inside the plastic cage. Its usually caked solid with carbon. Carburettor cleaner will sort it but don't be too rough with the bulb.....

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Don't forget to check the actuator pipes for the boost solenoid as its a common fault....

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