Ok so I replaced the uvch today cleared the codes started the engine and the code p1316 came back ran the buzz test faulted p1277 high to low side open cylinder 7 same as before. Could it be the IDM?
Thanks fo any help Larry
2003 f250 super duty 7.3
supercab long bed
4" exhaust with 5" magnaflow tip
Hypertech power programer III