With reference to more computer codes post; addendum - 1 Purchased a fuel pressure gauge that attaches to the fuel rail. Pressure measured at 54 psi. This is higher than manuals indicate (39 to 45psi) Also pressure drops steadily after key is off. 54 to 49 in twenty minutes and to 10psi in three hours. Should be near zero overnight. No sign of external leaks. Could this indicate a faulty injector? How can I test to isolate a bad injector? Fuel pressure regulator is new. addendum- 2 Test of MAP sensor showed 1350 rpm at 0 in Hg and 900 rpm at 20 in Hg. The Haynes manual suggests a reading of 300 rpm at 0 in Hg and 200 rpm at 20 in Hg. Are my high readings significant?

 

You should post to the same thread - that way, everyone can read the whole story.

 

Good advice. I will place future comments about this problem with the "more computer codes" thread. The administrator may wish to delete this thread.