Discussion Starter · #1 ·
can someone please comment. i have a 1996 eldorado and getting an engine check light for code po139. i have already changed all o2 sensors and was told it could be the fuel pressure regulator. i checked the fpr by the post i read earlier that if you disconnect the vacuum line and no sign of fuel is present then it's not bad. is this correct? could the fpr be bad even w/o signs of fuel leaking out the vacuum hose? thanks for any advise with this issue.