First off I'd like to apologize to Nachtritter for thread jacking. I thought it best that I start my own thread for this issue.
This is in regard to the 49 state conversion I just completed following Nachtritter's instructions.
Quote:
Got everything installed, double and triple checked all my work. Started up no problem, no check engine light etc...
Only problem is, now the part throttle hesitation i was experiencing previously has gotten much worse. Car runs fine until it reaches operating temp then it bogs and forces you to give it much more gas than before. I can tell having to drive this way is going to kill my MPG for sure. It's almost as though the car won't operate in lean burn mode at all.
When i pulled the old 02 it was white if this helps any.
The car has:
correct timing
new OEM cap, wires, rotor
new NGK plugs,
new fuel pump,
My thoughts are that since the wideband setup is much more sensitive, it's amplifying the problem.
My next guess would be:
clogged EGR, (****ty mechanic said this was working fine last week)
faulty TPS,
faulty MAP
help?...
EDIT:
I just unplugged the MAP and test drove it. Idle was rough but the hesitation went away completely! Does this mean the MAP needs to be replaced or does it mean the real problem is just being masked because the car is now running in limp mode?
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Since that post I've replaced the MAP with no improvement, seafoamed the intake manifold, again no improvement, cleaned out the EGR and intake/exhaust ports with no improvement.
What did work strangely was unplugging the brand new NTK/NGK L1H1. I drove it home today like this and it ran perfectly aside from the check engine light coming on. I'm stumped because I tried this before when the car had the P07-L01 (Cali) ECU and 4 wire 02 and there was no improvement to the hesitation issue whatsoever.
I even went back today through Natch and TomO's wiring instructions and made sure everything was connected properly.
Any help would be greatly appreciated!