Posted February 18, 201510 yr I have a 02 6 SPD. Has 150hp injectors and boost elbow. Truck runs great but once it hits about 30 psi boost it stops adding fuel, just like a light switch. Do I need a boost fooler? I had a tst at one time and don't remember my truck doing this. Thanks Adam
February 18, 201510 yr Owner I have a 02 6 SPD. Has 150hp injectors and boost elbow. Truck runs great but once it hits about 30 psi boost it stops adding fuel, just like a light switch. Do I need a boost fooler? I had a tst at one time and don't remember my truck doing this. Thanks Adam Yes. You need a boost fooler and a fuelling module that can calculate a fuel table beyond the stock 20-22 PSI. So you going to need a Edge or Quadzilla to make the best use of those injectors.
February 18, 201510 yr I'm curious. What kind of sensor is the boost sensor? and what kind of signal does it put out?
February 18, 201510 yr Owner It's a absolute pressure sensor. So it can detect changes in the elevation. It's a typical 0 to 5 volt sensor like all the others. The 98.5 to 02 sensors are not OBDII friendly they do have a offset voltage so they tend to display weird values like mine shows 28.6 PSIa at idle or roughly 14.3 PSI of boost.
February 18, 201510 yr Author Yes. You need a boost fooler and a fuelling module that can calculate a fuel table beyond the stock 20-22 PSI. So you going to need a Edge or Quadzilla to make the best use of those injectors. Thanks, I really liked the TST box that I had.
February 18, 201510 yr Mike, Atmopsheric pressure at sea level is ~14.7 psi so that reading makes sense woudln't it?
February 19, 201510 yr .... thinking about this I think that MAYBE I will need to add to my code that psi difference of 14.7 actually being 0 psi in the code.
February 20, 201510 yr It's a absolute pressure sensor. So it can detect changes in the elevation. It's a typical 0 to 5 volt sensor like all the others. The 98.5 to 02 sensors are not OBDII friendly they do have a offset voltage so they tend to display weird values like mine shows 28.6 PSIa at idle or roughly 14.3 PSI of boost. Mike, Atmopsheric pressure at sea level is ~14.7 psi so that reading makes sense woudln't it? Opps my bad... I knew it was 14 point something... Mike, are you saying your first post in this reply should've said 14.7 instead of 28.6? or are you giving this as an example of the differences the obdII in reading this sensor? Your reading of 28.6 PSIa At your altitude would be about ~ well, around 13-14 psi boost at idle... kinda high if actual! Just clarifying what was meant to be said here! I understand how the PSIa works.. it takes elevation in consideration because the gauge was set or based at 'O' atmospheres.. Where the PSIg is just measuring differences on the inside and outside of a vessel. Last time I had my Actron scanner on the truck, '28' iirc was what it was reading too @ idle. Edited February 20, 201510 yr by rancherman
I have a 02 6 SPD. Has 150hp injectors and boost elbow.
Truck runs great but once it hits about 30 psi boost it stops adding fuel, just like a light switch.
Do I need a boost fooler? I had a tst at one time and don't remember my truck doing this.
Thanks
Adam