2002 Tahoe Z71 flex, changed failed fuel pump assembly last week and went on a highway trip, of about 300 miles and oil light came on. Checked oil and needed to add about 4 qts. No leaks, so i checked pvc and it was plugged. Changed pvc and drove back and oil level seems to be ok. But this is where it starts to throw a bunch of codes and is running rough.

P0178: Fuel Composition circuit low input
P0207: cly 7 injector
P0226 Throttle PetalSensor/ Switch problem
P0301 #1 misfire
P0302 #3 misfire

Trying to determine common denominator...any suggestions welcome.

 

Did you have the fuel filter changed when the pump was changed?

 

No, but it was changed within the last year.

 

Update, cleaned Throttle body and used injector cleaner in gas, after another highway trip the only code left is p0178, but running great.