2004 Chevy Silverado V8 Four Wheel Drive Automatic 130.00 miles
Hi I have come here to see if you can help.
I have a system that lets me produce hydrogin on demand only when the truck is runng it is not stored.
I have been able to get up to 23 mpg but can not keep it up there it seems that every time I get on a hill the mpg go down and even if the road has a littel encline it well make the mpg go down.
On a level road is when I can get the best mpg.
I know that the pcm is programed to keep the truck at 18.6 because it will tell you that on the dash.
The thing is that I have conrtal of the o2 sensors and the map sensor.
But I feel that the maf is what is keep the mgp down.
I wish that you guys could hear how much quiter and smother runing the truck runs when the pcm dose not try to change the fuel air mix because it picks up the hydrogin as exter air and then starts to pump in more fuel.
have the same problem?
Saturday, September 13th, 2008 AT 6:56 PM