We have all new sensors & relays, except,ECM,MAF & MAF burn off,but te MAF checks out testing it, It keeps throwing code 33 & 34.idles ruff, what do you suggest,I can't find any ways to test burn off relay,but it engages when key is on,we reset the computer & after a while it throws the same codes. we are lost Please help! this motor was just rebuilt,everything new & can't drive it! I'm recovering from cancer & broke,if you can help I will find money for a donation! my son paid for my rebuild