'04 156 2,5 V6 Problem with engine temp and Motor Control System Failure
Pud237 - thank you for your input. I tried two different temp sensors, both manufactured by FAE and none worked. Must say I didn't have much faith when i installed the OEM sensor, but I'll be damned. The needle in the gauge now works in perfect harmony with the data from the ECU. During motorwaycruising the needle shows a perfect 90C and through town, it goes a bit beyond 90C before assumably the thermostat brings it down to 90C again.
If it wasn't for your comment about a batch of faulty sensors, there is simply no way I would have bought a third one!
Man the car is sweet now. Will have a grappa tonight!
Hello. Hoping for some help with my dear Alfa. Start of by excusing myself for bad english, beeing a Swede.
During summer I replaced the clutch and the cambelt/waterpump/idlers on the car. Been sitting on jacks for a month in waiting of a new crank pulley which arrived yesterday and today was the first testdrive. I've now two problems that I need some help with:
High engine temperature:
When pulling the clutch I accidentally broke the temperature gauge on the thermostat housing. I ordered a new one from ebay which looked the same and was supposed to fit my model and year. Today when driving, the temp gauge in the car rapidly climbed to 130C (about 3 miles from dead cold) and scared the living crap out of me. Open the bonnet and put my hands om both the hoses from the radiator and they where warm, but no problem gripping them. None of the fans (AC turned off) ran when I opened the hood and only started doing so after some time on idle and just for a short time.
Before the cambelt/waterpump swop, the temperature on the gauge when doing 50-60mph, has always been around 70C, and I can't work out why there would be any difference now which led me to believe that the sensor itself was the problem. Hooked up Multiecuscan and went for a drive and when the computer says 90 degrees C, the gauge in the car says 130C. The gauge in the car says 95C now an hour since the car was last driven. Do I need to calibrate the sensor? Input please! Where is the second sensor placed and can them being far from each other result in this?
I got no warning on the screen from high temperature and neither did the the red light on the gauge go off.
Motor Control System Failure:
When impacting a bump in the road at about 60-70mph, I get the above warning on display and the engine loses power, but only for a fraction of a second or so and then everyting is normal again. Battery seem to be a known culprit, but mine is 3 months old and since it only display the warning/engine cuts out on a hard impact from bump on the road, my guess is that there is a wire/contact somewhere that isnt seated properly. When swopping the cam belt, the intake was removed and so the two contacts on the back of the intake for what I believe is the ECU. I have release them and hooked them back on without any difference. Anyone having any suggestions? The car is lowered 50mm with Bilstein/Eibach components and is of course stiffer than normal. When winter arrives if this problem still is present, I will have hell on the rough terrain.
Cambelt was swopped using guide from this forum. DTI and camlocks used and from my point of view fairly easy on the V6. The clutch though.... The starter motor bolt from underneath is a right pain in the a**. I could have started a personal war with them Italians when removing it.
Thank you in advance for input!
Last edited by Pelvan; 17-08-15 at 16:30.
Reason: Problem solved!!!