Ok so I'll try to keep it short, I was needed cheap transportation so I bought a 4.3 sonoma not running low miles, changed everything on it tree times bashed my my head of the fender a few times said ge wiese and took it down the road to the mechanic (who is pretty accualy) scaned it got no map voltage just 0 and tried a couple of more maps still nothing, did a conuity test from the pin on the at the harnes and to the map and it was good, so he said the computer had grounded the map signal inside the ecm, so I'm wondering if this would be somthing that might be odd but happen, or am I still mising somthing, it a two hour drive to the nearest ecm and Ive spent alot of money on this already. any help would would be great.

 

anyone?