I have a 1997 Taurus, 3.0, Auto, 121000 miles. We just got it so I don't know it's history. I ran a scan on it with an Autotap scanner so I have some results. It originally had codes for low return voltage from the fuel pump and O2 sensors showing a bad cat. It acts like a bad cat, starts and runs fine, then when it heats up in about 20 miles, it loses power and will eventually stall. If it stalls or you shut it off and restart it, it runs fine for a couple of more minutes, then does it again.
The cats have been changed, fuel filter has been changed, the MAF sensor has been cleaned, air filter changed.
The MAF air flow reading and the TPS follow the opening of the throttle, the TPS shows a nice smooth graph with no hesitations or dead spots. The engine load is about 30% with the a/c on, the injector pulse width is about 25 until the problem starts, then it gets much wider and ranges up to 75.
The fuel pump doesn't shut off, the fuel pressure readings are within specs, about 32 running, about 40 not running, both the long and short term fuel trim readings follow along in a nice even pattern, with bank #2 having a slighly broader pattern than bank 1, till the problem starts, then the pattern widens from about -10 to +10 then drops to -10 and flatlines at 0. The car will still barely run. The graphs for misfire on all cylinders shows no misfires at all. There are no trouble codes. Any suggestions?
have the same problem?
Sunday, June 3rd, 2007 AT 5:57 PM