ECT 183 EOT 208 FICM 29 ?
I am trying to help my brother with his truck, and hoping I can use mine to eliminate a few possibilities like the reader not reading right.
My truck is a 2003 6.0, my brothers is a 2005 6.0. I recently purchased the torque app and 2 OBD II readers (one to keep in each vehicle) to check our temps.
Mine recently had a lot of work EGR delete, coolant flush, new oil cooler, studded. Mine with reader reads 181.5 ECT and 180.5 EOT, so if feel those readings are probably reading right on reader. My FICM Main power reads 48 Volts so I think that is probably close to.
What concerns me is his reads 183 ECT and 208 EOT on a basic 10 mile drive at about 55 mph after the temps stopped climbing. We were not towing anything. His truck has had the EGR Delete also after having EGR either cleaned or replaced twice, but no cooler work.
I don't know if one has anything to do with the other, but his FICM voltage seems off too. When I read his truck I get 29 on FICM when starting cold, after it warms up a while it finally makes it to 42 volts. He notices FICM voltage drops when he accelerates, I'm guessing the injectors are drawing more power and the FICM can't keep up supply, I really don't know. It has a solid 13.5 FICM LVOLT in. I have been reading on these a lot and some suggest it is cold solder joints in FICM.
Thanks for any help, he really doesn't know where to start and I mentioned I have read that either problem could lead to more expensive repairs if not taken care of now. I think I read a bad FICM can take out your injectors, and High EOT can cause head gaskets to blow. I don't even know what are acceptable temps or voltages for certain as there is a lot of information out there to digest.
Last edited by Paul2000; 11-25-2012 at 04:23 AM.