Have a Car Question? Ask a Mechanic Online.
megane 2000 1.6 16 valve Car was running perfectly until mid Dec when crank pulley inner and outer came apart causing aircon belt to snap.This resulted in belt particles getting into the cambelt gears.This caused cambelt to slip a gear resulting in bent valves. Head has been redone , valves replaced, the idle control valve as well as the ignition sensor have also been replaced. The mechanic cannot get the ideling to stabilise at correct revs, it just continues going up (2000 - 2500 revs) Its 2 months later, we cant use the car and the mechanic & auto electrician canot get it right!! PLEASE HELP!!!
How long will we wait for an answer?
I think it indicated the ECU. That was then taken out and sent to JHB for checking and has come back, been fitted and they say the readings are all correct.
Is it normal for so many things to go wrong following the aircon belt snapping?
Any idea how much longer this will be ?
Hi Mike, I certainly hope you are on line tonight!
I consulted with the mechanic and auto electrician today regarding the info you supplied. They advise that this vehicle does not have an air meter. They say their next step on Monday will be to recheck the electric circuits that control the idling and to compare it to a vehicle with a similar engine to see if they get the same readings.
I must mention that when you first start the car the idling is fine but after driving for about 10 minutes it just starts rising.
I spoke to someone today who suggested that they should replace the O ring of the throttle body where it attaches to the engine.
Can you give me any other advice? We are really desperate to get this car right now... after all its been with the Mechanic for two months!
Thanks Mike. I will discuss this with them on Monday and see how far we get now.
The car is still at the auto electician who is now checking the wiring.
I have discussed your last info with the mechanic who advises us to let you know all that he has done thus far:
vacuum leak test - tested for air leaks
scoped map sensor - pass
scoped idle air control - fail
tested IAC (brand new) pins A & D 50 and pins B & C 50 (omes)
scoped pin out at ECU
ECM pin 41 - no signal
pin 12 - no signal
pin 42 - no signal
pin 72 - no signal
IGNITION ON ....................Book Values
ecm pin 12 - 12.46 v ..........Battery voltage
41 - 0.03 v.......................... Battery Voltage
42 - 0.03 v.......................... 0.3 v
72 - 0.03v............................ 0.27v
Two fault codes on ECM that will not clear no number for codes only description:
***idle control mal function.
If you are able to look through this info, we would appreciate any further suggestions.
Thanks so much
tested IAC (brand new) pins A & D 50 and pins B & C 50 (ohms)
Please give me more info on the company I should contact regarding the ecu.. I tried calling the number you gave me and it just said it doesnt exist.
I am in East London, South Africa.
The auto elecrician resorted to fixing the idle air control in a permanent position by glueing it.
This allows the car to idle at 1100 rpm and when the aircon is on it drops to 900rpm. This has enabled us to use the motorcarsince yesterday. I am however concerned about the long term effects on the engine. Could this have an adverse effect on the cars performance?
Kindly let me hae your view on this.
Thanks so much!