So I am working on my Grandmas Taurus. 70k miles, Grandpa serviced it regularly (every 2500 miles according to the maintenance log) before he passed.
It was running badly, couldn't idle, but would be fine at cursing speed.
Friday I finally got a check engine light 0171, 0174.
I tried the propane and cleaner tricks to find vac leaks, non found. I visually inspected all the lines, none are broken.
I pulled apart the pcv
system, no cracks but replaced it all anyway.
I pulled the uim
and replaced those gaskets too.
Watching the live data on the car TPS
has no dead spots, it is at .91 volts
Sucking on the EGR
will kill the car.
Fuel pressure is right around 40 psi
reads about 26% at idle.
B1S2 and B2S2 fuel trims are maxed out at all times
B1S1 and B2S1 fuel trims dance around 0%
When I rev the engine to 2500 rpm
and watch B1S1/B2S1 the levels don't drop off, they just flatten out. I think that means I don't have any vac leaks.
Any help as to what I should test next would be appreciated.
I am out of ideas and codes are gone now, KOER
finds no problems.
The idle is OK, but every once in a while it stumbles.
When I try to accelerate up to speed it just dies.