I've got a 1993 taurus/sable with a 3.8 engine. The check engine light
is on hard! The codes that I pulled are 337 and 157. Within the past
year I have replaced the DPFE sensor, the MAF sensor (to fix other
codes), and just now I put on a new EGR valve, but no luck. I need to
do more investigating, but I was hoping someone might be able to
direct me a bit.
One thing I want to do is make sure that I didn't hook up one of the
hoses incorrectly. There's a vacuum hose coming off the EGR that goes
way down in the engine compartment, ending at the front of the car
(driver side) near the bottom of the radiator. Anyway, on the way
down, it goes into a metal cylinder (relay?) and then exits through
another vacuum hose. There is an electrical plug that goes into the
cylinder. I don't know what this is, but it occurred to me that I
could have reversed the entering and exiting hoses.
Any help appreciated! thx