after 20 minutes drops to 46 and holds psi? cant find regulatorThat's about spec for my '98, I can only assume that's what your '99 calls for.
Does it hold pressure when the pump shuts off? Any sign of leakage through an injector or the fuel pressure regulator (FPR)?
that's what i meant engine coolant [COLOR=blue! important][COLOR=blue! important]temperature [COLOR=blue! important]sensor[/COLOR][/COLOR][/COLOR] what i had to do was disconnect the battery for 5 minets then reconnect and and it shot me the code for the sensor i changed that and presto fixed.Glad to hear you got it fixed.
Since diagnosis is often 90% of fixing a problem, can you fill us in on some of the details. How did you determine the "heat temp sensor" was bad? Which sensor is the "heat temp sensor"? I know there's an engine coolant temperature sensor and an intake air temperature sensor, or maybe you are referring to a heated oxygen sensor.