Got busy yesterday running errands with the family and taking the kids to our local pool. I'm going to check the fuel pressure on lunch today, Haynes Manual lists correct pressures as: 30 to 45 psi at idle with vacuum hose attached, 40 to 50 psi at idle with vacuum hose detached, and 30 to 40 psi system hold pressure after 5 minutes.That’s probably why it had low fuel pressure then. You’ll get leakdown, the key is how quickly it leaks down.
Do you think injector duty cycle might shed some light? The lean AFR along with decent fuel pressure had me wondering this as well.just because you have good pressure does not mean that they are firing the correct amount of fuel. Its not hard at all for injectors to get gummed up from dirty/old fuel. Unfortunately the only choices are to remove those and have them cleaned/calibrated or replace them and see if its better after.
I mean the gauge is using a brand new Bosch sensor and had been reading at the expected AFR’s until recently.I read through the last few pages about the fuel issue. Are you 100% sure your AFR sensor is reading correctly? if so then I think your only two options left after all you have done is to either
A) pull the injectors and have them cleaned/calibrated as ttocs suggested
B) drop the tank, replace the pump and inspect the inside of the tank to see if dirt is floating around inside
I have brand new NTK 02 sensors, the Bosch is the wideband 02 for the AEM wideband 02 gauge and was widely recommended both by AEM and the forums.Bosch are known to be junk on these cars. I’ve personally had a few go out after a short period of time so I can vouch for that. I’ve read, and take this with a grain of salt, that they are calibrated differently than the stock NTK sensors.
ABS light is still on, I just decided to remove the damaged section, and then haven't put the new one in. The only reason I wondered is the relation to traction control, as this feels like the injectors are getting a signal to cut... it feels in the pedal like traction control kicking in where throttle position is being over ridden. It could again be something simple as fuel pump can't keep up at WOT even though it's putting out normal pressure at idle. It doesn't feel like a single cylinder misfire.so the light is no longer on? I know getting the sensor out of my 94 was a pia and I thought it was seized as well but it just needed some penetrating oil and a good twist.
This and some suspension are the last things… AFR had been in the 13-14’s on cold start and 14’s at idle going to 11’s with load. While measuring my fuel pressure it was idling in the 16-upper 16 range.dang man, i've lost track now what all you have going on. AFR now?
Things that stand out:Does it show it pulling timing or anything?