Low Boost and Sluggish Acceleration
Hi, I'm new to the forum. I have a problem that has been stumping me for quite a while now and I was hoping to get some help with what it might be. I have a 1997 7.3L powerstroke with an automatic tranny. It has about 180K on it and I have owned it since it was new. At about 130K, I put a Bully Dog 4 bank chip in it and the truck ran great. It was very responsive and fun to drive. For about a year now, it has been getting less responsive and doesn't seem to be as quick as it used to be. From a stop, when I accelerate it takes off quickly like it used to but then boggs for a second or two like it can't get fuel fast enough, then takes off again. Recently, I replaced the Bully Dog chip with a TS chip, installed a 3" downpipe, and a Banks intercooler, along with boost and pyro guages. These upgrades seemed to help with the problem, but did not get rid of it. The boost guage reads a maximum of 11 psi at about 3,000 rpm. This made me think the turbo was going bad, but it still spools fine seems responsive on the guage. There is no shaft play, the assembly rotates smoothly, and the blades look like new. So I was thinking that maybe there is a fueling issue that is causing the turbo not to spool. I was thinking maybe the HPOP is getting weak or the injectors are going bad. Any thoughts on this would be greatly appreciated!!!!