[Code5A]

I had an interesting observation when I had the truck at low altitude recently. As expected it felt stronger and pulled harder. The one that I can't explain is that it smoked more. The smoke was darker and a bit thicker than it is at this altitude. I pretty much exected the reverse to be true. I would have to assume that the PCM is doing this as part of an altitude compensation function. I wonder what all is going on. Is it cutting back fuel increasing the timing or what? I had not heard anyone talk about this before only that at higher altitude glow plug times are longer. It also makes me wonder if a trick to fool the baro sensor might be in order. I would like to hear your thoughts. I would love to have few of the extra ponys I could feel.


Tom

 

[Krogg]

i have scanned a psd befor, there is a baro sensor, as for altitude compisation, i have to wonder too, as you are closer to sea level, it should give it more fuel, so more timming advance, let me hook a scanner up and see if i cant add a some resistance to the baro sensor and freak it out a bit, ie -1200ft>>>???

 

[iwantaturbo]

i was just in ca at 55feet and in wy im at 5000 feet.

in ca it smoked less and ran harder but had way more turbo lag!!!! this was in my 99.5 though. with my chip and pre chip i can not clean up my smoke here in wy and can not make smoke in ca? but mine was a 99.5 /ubbthreads/images/graemlins/shrug.gif