Quote:
Originally Posted by BroncoJoe19  There is no chip for airflow. The IAC is the actuator controlled by the PCM to regulate airflow into the engine.
The MAF measures airflow into the engine. YOu might buy MAF cleaner, and try cleaning it. Be sure to let it dry before hooking it back up.
If you are not sure what you are talking about, please describe it. |
First of all. Thanks for trying to help me.
I'll try to explain. When I start the car, it works fine the engine. But when I give a lot of gas and let it go, the engine stops when it slows down on the rpm. When I drive it, I have to give some gas all the time to keep it running. When I let the gas pedal slowly down, it manage to keep running. I have changed the sparkplugs also. The engine makes no strange sounds and runs fine as long as I give a little gas.
Been reading your link about the IAB and it sound like that may be the problem.
Deceleration:
•When you take you foot of the pedal the IAB is at 100% to prevent stalling.
•As the engine returns to idle speeds the IAB lowers the duty cycle to keep the RPM stable.
•When the vehicle comes to a stop the IAB is now controlling the Idle.
Full Throttle:
• The IAB does opens 100% at full throttle. But the debate is if air flow increases.
•Air now has the option to entering the full open throttle body or the IAB.
•Air diverting through the IAB would disrupt the main air flow path through the throttle body.
•I haven’t seen any flow bench test data to suport this.
•You do have “possibility” for higher flow, but it�s more violent and turbulent now.
IAB TESTING
This is really easy to test. First as with all problems you should gather the trouble-codes from the computer. Follow the codes for testing and repair. If you get a code that points to a problem with the IAB start the vehicle and bring the engine up to operating temperature. Allow the engine to idle without any driver input to the throttle or pedal. Go under the hood, and disconnect the electrical connector to the IAB. If the engine begins to stubble or stalls the IAB is functional and does not need to be repaired. If the engine idle does not change you should remove the IAB for inspection.
The IAB can pass and still need repair, or it can fail and not need replacing. The plunger and internal spring can get clogged with dirt and oil. This will slow down the air flow and not allow the IAB to function properly. Remove the IAB and clean it. There are 2 halves to the IAB, and you can not buy just one half, but you can take it apart to clean it. But if the internal solenoid is faulty the IAB needs to be replaced.
FORD ESCORT 1.6 stv 1998 model needs help... 
Linear Mode
