my guess, those DTCs off a cheap scan tool>? why not post source and real codes, no lie P0301 is real. but off what?
real engine: Name.
4.7 L 2UZ-FE V8
VVT-i variant??? got VVT?
IF ONE SIDE FAILS
, misfire there. if cam retarded. if bad, can be 14deg retarded, (huge)
see cam action here.http://www.mr2.com/files/mr2/techinfo/Random%20FSM%20Data/2uz-History.pdf
if using a full real scan tool that sees all toyota extended DTCs
, you might see VVT errors, $20 tools and lame autozoned , blind .
there are 4 sensors there, id bet there are codes you missed!
P0301,3,5, and 7, DTC, ONLY?
bad coil packs? no.
thats the whole left bank, bad.
RF 2-4-6-8LF 1-3-5-7
so, VVT bad on left bank or coil pack ,
yours has 8 COP coils, so its not 4 bad COPS.
a real mech sees all this in 1 second , online, impossible
nor country. sold.\'
could the timing belt slip only on one side
did you do timing belt service, on time, if not, bingo.
misfire isbad compression
bad spark , no, not all 4
bad fueling, but there is only 1 maf/map, and one full injection rate there so not fuel mix.related.
here is a tool (most AZ stores clueless)
that reads the enhanced DTC of Toyotashttp://www.amazon.com/gp/product/B001QIUGVI/ref=oh_details_o01_s00_i00?ie=UTF8&psc=1#productDetails
using a 1996 tool , misses the boat.
but id bet your VVT is bad. left bank.
the real tool might help. here.
P0011 Diagnostic Trouble Code Discussion for
Camshaft 1 Position Sensor Target Performance
P0012 << or this>? P0020/21/22?
the FSM shows the manual tests for these VVT parts.