I bought a used '02 dmax last year with 160k on it. Injectors had been done at 90k under warranty. I'm now at 183k and am getting a frequent cel for low fuel pressure under power enrichment mode. My brother in law is a tech at the local dealer and we hooked it up to the tech II. 50% of the injectors are creeping up to the 4% balance fail rate. Does anyone make an upgraded injector for these, or can I expect to replace these every 90k like clock work? I bought the truck for the trans, but $2500 in injectors every 2-3 yrs is tough to swallow.