Ironembraced

Sounds like you are not getting any power to your 02 sensors. Try checking the 02 fuse and swap out the mini relay.

dw1998ls1

Changed fuel pump and filter car still dies at WOT. Any other sugestions

Ironembraced

try another set of injectors. measure yours with an ohm meter, and run some Seafoam through your fuel system.

i assume it could be a sensor problem like IAT/MAF/MAP or O2. those 4 all can adjust fuel mixture.

You might want to get some data logging from a tuner before this issue drains your bank account. They will be able to pinpoint the problem driving your car with a laptop hooked up.

Ironembraced

you have an obvious issue with your O2 sensor heater circuit. did you ever investigate this? doesnt sound like a coincidence.

slowpoke96z28

iTrader: (2)

thats an assload of work to not fix anything. still waiting to hear those pressure numbers when the failure occurs and what those plugs look like. its too late to compare pre and post pump numbers, but it may still give a clue.

myk

iTrader: (4)

That's an interesting idea, I'm curious to see what the 'OP has to say as well...