Question about Q4 - Alfa Romeo Forum
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(Post Link) post #1 of 3 Old 29-12-09 Thread Starter
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Question about Q4

hello all...
I have a question about my alfa 155 Q4...
Problem is that when the water temperature is under 90, car is going very fast..
but when the water temperature is 90, car is going very slow...turbo efect is loosing...
I know that when the engine temperature incrising, most of cars became slower, but in my case this difference is seriously...

sorry for my English...
I hope we'll understand my question... thank you...

Last edited by gio_155Q4; 29-12-09 at 09:12.
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Check the thermostate
My friend has a Q4 and he keeps his cool, he took out the air-con radiator and the front fogs to keep the air cool and the oil cooler cool aswell
Ther last thing you want is for the car to get too hot and the head gasket to blow
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There should not be a dramatic difference in performance over a small change in engine cooling water temperature. Something is wrong. Check the water level, oil level and thermostat to see if the reading is right. If that all looks OK then you need a mechanic. You may have a gasket leak opening and losing compression or sticking piston rings causing loss of compression or even partial seizures due to temperature changes. Or something silly like ignition advance being affected.
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