WS6wanted

Hey guys,

Im chasing a fuel in the oil issue and when my car got tuned years back, I asked the tuner to remove some codes to help me pass emissions.

I think I messed up and need a few of those dtc back because they are related to lean and fuel trim codes.

Is there a simple way to for me add those dtcs back as someone who has never did any tuning before and dont own hptuner program? It's a 98 with exhaust and a tune.

LS1Formulation

iTrader: (13)

You need the program in order to change anything in your PCM. However, you should be able to figure out your problem without doing that. If the car was running fine and started having issues, normal diagnostics should figure out the problem. First thing I'd do is hook up a fuel pressure gauge to your fuel rail and see where it's at. Then shut the engine off and see if it bleeds down quickly. It should hold pressure pretty well for quite awhile. If the pressure starts dropping immediately, you probably have a leaking injector. You can do a loan a tool for the pressure tester at any big chain auto parts store.

WS6wanted

Thanks Ls1Formulation. The injectors dont leak with pressure testing and were pro cleaned and tested as well. I believe the computer is commanding more fuel than it needs. Maybe an exhaust leak around the o2 sensors. Still collecting live data and want to test for leaks on the exhaust.

I would like those codes resurrected tho, they are important and I shouldn't have gotten them removed.