injector problem

[garagedog369]

after replacing egr tubes, throttle position senor,fuel pressure regulator. the only code i,m getting is # 186-injector pulse width higher than expected. i asume that means i,ve got to high voltage going to my injectors. i drive this explorer daily. 75 miles round trip. it seems to run good, but the light goes on and off. about 3 to 4 times each way. seems to be random.what do i have to look at next.my other ? is i.ve been thinking about replacing o2 senors. more for better gas millage than anything else. do you think the cost of replacement is worth it?

 

[MrShorty]

# 186-injector pulse width higher than expected. i asume that means i,ve got to high voltage going to my injectors.

Incorrect. The "pulse width" is the amount of time the computer is calculating to have the injectors open. When the calculated pulse width is higher than the given threshold (trying to make the mixture richer), a fault is indicated and the code is set. This code points to a problem in the A/F mixture calculations which are based mostly on the MAF, TPS, and O2 sensors. By the book, the usual first test for A/F codes is to check the fuel pressure. and continue until you figure out what is wrong with A/F mixture.