Hey folks, Got a question for you. I have replaced the head on my son's 850 and got everything running but there seems to be a lack of power. Now to get to this point took a while since this was my first Volvo engine to work on. From all that I have read, I still have not been able to extrapolate th...

Hi guys,

I have this 4-1-8 code and it won't go away on my son's 93 850 GLT. I have been reading your posts on this subject and I have a question...What the Heck is a MOSFET?? Until now the only MOSFET I knew was a sound system....Thanks