02 tahoe throwing codes

[joatman]

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 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, what to check next...any suggestions welcome.

 

[BlueTahoe2001]

P0207: Sounds like a clogged injector or rail possibly...
P0301: Possibly a bad coil
P0302: Possibly another bad coil..

Maybe someone else will chime in and help you pin point the problem!

 

[joatman]

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