To build a boost fooler, you need to obtain a 10Kohm linear-taper POT from your local electronics vendor (Radio Shack #271-1715), some wire (16 ga should do) and either a decent crimp-connector set or some rosin-core solder and shrink-wrap.
The POT wires into the 3 wires coming off the Boost sensor, mounted on the intake manifold. (shown in picture #1)
The circuit diagram is shown in picture #2
Once this setup is installed, starting with the POT set to O resistance, you can 'dial-up' the resistance to 'fool' the PCM into seeing less boost than is really there.
To illustrate, your PCM will normally throw an overboost code when your boost is over 10psi sustained... it would first try to reduce the boost, but with a TM installed, that isn't possible, so it woule then defuel in an attempt to lessen the boost and prevent engine damage.
Having a boost fooler in your sensor circuit removes this safety feature and makes it possible to run damaging high boost without the engine being protected.
You should therefore only use this mod with gauges and a level head
__________________
Please include your vehicle details in your signature. Click
here to fill out yours.
=================ΜΟΛΩΝ ΛΑΒΕ==================
1994 Silverado SLT c2500, 3.73 gears, "F" engine, 300 000 km, Snorkle-ectomy and Airbox mod, TCC mod, Mandrel-bent DP and crossover, 3" Duramax resonator, 4" constant-radius out the back.
(
Heath Essential Upgrades) PMD Isolator, Max-E-Torq 2.0, Turbomaster, Severe-Duty Fan Clutch, Heath HO LP, Injectors, (Bosch) Duraterm Glowplugs