tpricez71
TYF Newbie
Yall helped me diagnose a bad fuel pressure regulator recently, could use your help again.I have changed the regulator, pump, o2 sensors, and im still getting lean codes bank 1 and 2. I cant find any vacume leaks. Sprayed carb cleaner around suspect spots to see if engine rpm would speed up indicating a vac leak. no change. did same with a propane test method. no change. a little further anomolly. when i first start the hoe and put it in gear and push the accelorator it bogs down briefly, corrects fairly quickly then no more problems rest of time running. next time i start it , it may or may not repeat the same. things i have noticed which may or may not have bearing. Fuel pressure rises up to 55 when i turn key to on position for about 5 seconds then starts to drop fairly quickly. shouldnt the pressure hold steady at 55 , and is that a bit low? could the regulator i installed be defective? im running out of ideas. my parts guy says i should replace the intake gaskets cause they are known to go bad on vortecs. If it helps when i put the scanner on it retrieves stft of +7 to 10% and ltft of+25%. im confused and over my head. any help or advise will be welcome.
