Potential vacuum leaks aside, I would question the cleaning interval of your injectors if stock fuel pressure (no vacuum to the diaphrams) seems like its starving the engine. Also check your regulators for scent of fuel at the vacuum port. After that, try swaping the Air flow meter (predecessor to later MAF).


the sensor at the bottom of the drivers side plastic tank at the radiator is a temp switch to turn on the auxilary ac fan, which turns on when 1 of either 2 conditions are met (ac relay is triggered, temperature sensor closes the circuit.) jumpering that should have the fan running even when cold as long as the key is in the on position (engine does not have to be running).

I have ran an entirely custom fuel system.

The injectors are brand new 0280150201 injectors from Fiveo Motorsports. If anything, I expected my fuel pressure needing to be lower to compensate for fresh injectors.

I no longer have the fuel dampers or stock fuel pressure regulators.

The auxiliary fan has never ran. It must be defective. I am having vapor lock issues, so I plan to put a fuel cooler where the fan is currently. I've been looking at fuel coolers with fans, so that would be a dual purpose modifcation. My fuel pump is a modified Bosch 044. My car didn't have the in tank pump. My feed lines to the pump are 10an, but I have my fuel filter before the pump now. It is a reusable Golan fuel filter claimed to flow 900GPH and filter to 10 microns. It is clean as a whistle, but I guess the 044 is pulling enough vacuum that once the fuel gets warm enough, chemistry takes over.

After removing the vacuum lines from the OEM fuel regulators and dampers, I have noticed my HVAC is warm all the time. The flap that bleeds hot and cold air is no longer operating I imagine. (I haven't had A/C for over a year due to a failed resistor pack.) At least the air usually coming through was ambient and not warm from the heater core. Where should I begin to look?