Verified answer

Change the injector after you confirm it's not a wiring issue

Try using CHEVRON TECHRON injection cleaner. Then clean your IDLE AIR CONTROL VALVE and THROTTLE BODY with GUMOUT and SEAFOAM. They FINE TUNE the air part of things. POWER WASH engine, and forget about the INJECTOR thing UNTIL this is all done right. GOOD LUCK!! A bda injetor can FEEL Like it when the T body is NOT working right. GOOD LUCK!!

Don't have an answer to your question. Just wanted to say props to driving that thing till 280K