This is a spin-off of my orignal thread.I hooked up my laptop today and got some weird readings. With the key in the "on" position, and not running, the TPS is at 16.5% and the MAF was reading 0.117#/min. Shouldn't both of these values be ZERO if i'm not touching the gas pedal AND the engine is off?!?
This would explain why my car won't idle without dying. The computer thinks that the throttle is open so it is dumping gas into the engine and closing off the IAC. This is drowning my Zetec in fuel and not giving it any air. I've gotta swap out that TPS!!!
BTW, what kind of readings should I have for my MAF and TPS at a given RPM?
Here are some of my other readings...
Engine off:
MAF=0.177 #/min
TPS=16.5%
ECT=73 degrees F
IAT=45 degrees F (It was about 40 outside)
Started and holding gas to maintain 2k RPM:
MAF=1.113 #/min
TPS=20.8% (only 4% change?)
ECT=180
IAT=54
LOAD=25.9%
Short Term Fuel Trim=varied from -1 to 0
Long Term Fuel Trim=3.9
Spark Advance = 35.5 degrees
#1 O2 Sensor = varied from 0 to 0.745
#2 O2 Sensor = 0.725
Revving to 3500RPM:
MAF=1.702 #/min
TP=21.6% (less than 1% !?)
Spark Adv = 36.5 degrees
LOAD=29.4%
Idling badly:
MAF=0.366 #/min
TPS= 16.5%
ECT= 185
IAT= 66
LOAD= 41.2% (MUCH higher then at 3500RPM)
Short Term Fuel Trim= varied from 0 to 2.3
RPM = 800
Spark Advance = 28 degrees
#1 O2 Sensor = varied from 0 to 7.35
#2 O2 Sensor = 0.818
FYI, all readings were done with my car in park.
BP
