First off its a 91 toyota pickup 4x4 a/t 3vz 3.0. I have been having problems with the cooling so it wont go into over drive, often anyway. I did upgrade to a 192 degree thermostat and its still running cool. i also changed the clutch on the cluth fan any ideas! And i was getting 10 mpg i found that the vac lines for the egr were all mixed around so in the middle off fix that i guess i hit a loose wire cause now it wont read the ecm! Checked all the grounds that i know of ( 6 ground points) but didnt find anything!? Im getting fire to everything in both fuse boxes and to the coil but not from coil to distributor! Any ideas??????