Boy, now that's what I call a very subjective test.&nbsp You realize if you electrically disconnect the boost sensor from the wiring harness, the ECU defaults to a 4.x psi setting?&nbsp So anything below 4kRPM or so and the car run overly retarded ignition timing; an overly retarded ignition produces very little power.&nbsp Now if you're talking about removing the boost sensor vacuum line, the boost sensor now sees "0" manifold, which should induce detonation due to too advanced timing.&nbsp Overly advance timing (and detonation) also will kill power (and the engine).

I've seen our improptu test show no adjustment to the fuel injector pulsewidth with change of boost sensor input.&nbsp No7Yet has also confirmed this is true.


Care to quantify "pretty rare"?&nbsp I find next to the TPS, the boost sensor fails pretty commonly.



-Ted

 

I heard "if it reads something and changes, it ain't broken"

 

Well....Ted's always right (well...mostly). Anyway...I've never seen a boost sensor fail but if he says they do then I'm sure they do. Still does not change the fact that your problem probably lies in the gauge.

Todd

 

mine was reading.. erractically due to wiring. I watched my stock boost gauge needle literally spasm up and down under boost, after I ran a new wire and spliced the stock gauge in, it was rock solid, in fact, I wonder if I've had bad wiring the whole time I've had the car; it seems like the boost signal had degraded to the point where I just ignored the stock gauge. From people saying the stock gauge is worthless, that almost screwed me. I would check the signal wire anyway.

 

The stock gauge is useless for getting an accurate boost reading, but it does provide a good indication of the health of the pressure sensor. Remember the pressure sensor controls ignition retard under boost. So if the gauge acts up, don’t ignore it! Check the pressure sensor immediately. It could save your engine’s life.

 

Yeah, definately. I had some minor detonation, and I haven't done a compression test yet, but my car idles fine, pulls strong, and has decent vacuum.