osidis

well in preparation of getting a turbo kit, i thought i would upgrade the cooling system to support the extra heat. So, i went with mishimoto parts, radiator, hoses, stat, fans, and fan switch. i flushed the system completely with distilled water and then replaced it with 50/50 and added 2 bottles of royal purples engine ice. under normal operation, the temp gage was at 7-8 bars. mine is an ap2, my understanding is that 7-8 is the norm. however now it operates at 4-5 bars. so, is my system TOO efficient? i already reset the ecu and it did it again. so im a little worried now. i will check the code tomorrow. it doesnt retard my system either. any input would help. any ideas what caused it? and is i bad for my car?

i have an AEM version 2 ems, would this fix my issue if is is indeed my factory ecu that cant support my mods?

wisdom

Last I head, AEM did have a problem with the temp gauge correct? As far as why you have CEL, its best to pull the code. That way you know exactly what is wrong.

Have you double checked all your connections?

osidis

apparently my cooling system is too efficient. i found out im running at 140 deg. well who ever heard of running too cool?

Gernby

It sounds like your thermostat is missing, or stuck open. It is definitely too cool, and will drastically increase wear while also reducing power. Get a late model AP2 thermostat in there, which is about 10 degrees F hotter than the earlier thermostats. Basically, hotter coolant temps are better for power and efficiency.

osidis

i got it figured out. its neither issues. i broke the knock sensor when i tried to instal the new thermostat from the top. i forgot it was there. do not break it!!!! its a $150 part. all is good.