My brothers max overheated yesterday. He has about 91K on his car. It is a 1995 GXE. While we were putting more coolant in the radiator, the sound of the engine changed, and smoke started coming out of the whole where the radiator cap is set! Now today we started the car, and everything seemed fine (because the car was probably cold), but the car CANNOT rev over 2k! It kind of starts shaking after revving to 2k. Can anyone tell me what has happened to the max? What will the cost be to getting it fixed? Thanks.
MAFsensor
You prob have this code.
0102
Diagnostic Trouble Code 0102 points to a problem with the Mass Air Flow Sensor. The MAFS is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a thin film that is supplied with electric current from the Engine Control Module. The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot wire is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to the hot film as air flow increases. This maintains the temperature of the hot film. The ECM detects the air flow by means of this current change.
This malfunction is detected when an out-of-range voltage is sent to the ECM. That voltage might be too high or too low.
a) An excessively high voltage from the MAFS is sent when the engine is not running.
b) An excessively high voltage from the MAFS is sent under light load driving conditions.
Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Faulty MAFS
c) An excessively low voltage from the MAFS is sent when the engine is not running.
d) An excessively low voltage from the MAFS is sent under heavy load driving conditions.
Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Intake air leaks
- Faulty MAFS
With DTC 0102 the ECM is supposed to switch into Fail Safe mode and limit engine speed to 2400 rpm.
First I would re-ground hte harness. Then if that doesnot work, find a new/used MAF
www.car-part.com
You prob have this code.
0102
Diagnostic Trouble Code 0102 points to a problem with the Mass Air Flow Sensor. The MAFS is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a thin film that is supplied with electric current from the Engine Control Module. The temperature of the hot film is controlled by the ECM a certain amount. The heat generated by the hot wire is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to the hot film as air flow increases. This maintains the temperature of the hot film. The ECM detects the air flow by means of this current change.
This malfunction is detected when an out-of-range voltage is sent to the ECM. That voltage might be too high or too low.
a) An excessively high voltage from the MAFS is sent when the engine is not running.
b) An excessively high voltage from the MAFS is sent under light load driving conditions.
Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Faulty MAFS
c) An excessively low voltage from the MAFS is sent when the engine is not running.
d) An excessively low voltage from the MAFS is sent under heavy load driving conditions.
Possible causes include...
- Harness or connectors (the sensor circuit is open or shorted.)
- Intake air leaks
- Faulty MAFS
With DTC 0102 the ECM is supposed to switch into Fail Safe mode and limit engine speed to 2400 rpm.
First I would re-ground hte harness. Then if that doesnot work, find a new/used MAF
www.car-part.com
Quote:
Originally Posted by s0ber
Check codes then come back to us =\
The check light was on a while ago, but it went away. I never had the chance to check the codes. There is no check light on right now, but i checked anyways: 0304---Knock sensor
Senior Member
When you overhead an all aluminum engine it can be a very bad thing. It can warp the heads pretty easily and cause permanent damage. Maybe the valves are bent also... does it make bad ticking sounds?