Flooding out

641RAMBO

MEMBER
1998 PONTIAC SUNFIRE
4 CYL
FWD
AUTOMATIC
130,000 MILES

1998 2.2 sunfire could the ignition module cause the computer to say its at 99percent when the the throttle position sensor has been changed and checks out ok? Ive checked compresion and spark and fuel pressure all ok changed fuel regulator crank position sensor air temp throttle position water temp and by the way all check out when I scanned the car with a profesional scanner the only thing that seemed odd was the scanner said the car was at 99percent load. The car is flooding out and the only way I can get the car started is to take the fuel pump fuse out and put it back in and out and in and out exctra. Im at a loss Im thinking computer but Im hoping not by the way there no codes.

1 Reply

FACTORYJACK

MECHANIC
4,159 POSTS

It is odd that it says engine load is at 99%, and this may be normal for a key on reading, the only way to tell would be to compare with a like vehicle. One thing to consider, and a indicator of engine load would be the MAP sensor. A normal key on reading for a vehicle at or near sea level would be 101 kPa, and this would decrease as vacuum is applied. With that being said, look at that rading, and if you have a vacuum pump, apply 28-30" of vacuum to the sensor, and see if the values change. If you remove vacuum from the sensor when running, it will go full rich. Check that there is vacuum getting to the sensor as well. It may or may not set a code, if the circuits are intact. It looks like the MAP sensor is in the intake, and the procedure for removal shows it under the throttle body. The passage could be plugged with combustion deposits.