Hi,
It was my friend's Adventure 1.6 petrol decided to play a bit. Couple of days after the car wash, it simply refuses to start. It cranks fine but didnt start. The only option is to tow the car to the service station(Read $$). He seeked my help and I gave a try to make the beast come alive.
Analysis
Day 1 late evening:
1. Cranks are healthy but the engine didnt start.
2. Suspected fuel pump and relay. Gave a dose of WD40 to all the connector and relays to remove water if any.
3. Checked the fuel pump relay and its good and no over heating.
4. removed the fuel pipe and turned the ignition on. Petrol erupts from the hose eliminates fuel pump failure.
5. checked the exhaust pipe for any blockage. As the kids around.. there is a possibility. Every thing seems fine but refuses to start.
6. checked the airfilter box and its good too.
7. Removed the ecu socket it was clean. Didnt open another set of socket.
Day 2 early morning:
1. With a multimeter, checked the primary and secondary ign coil and found to be within the range.
2. Checked the MAP sensor output and the voltage is 4.99V. Now I assume ecu is working
3. Removed the cyl 1 sparkplug connected to the HT wires and cranked- No spark.
I somehow relieved guessing the culprit must be crank position sensor.
4. Corrected the plug gap as its incorrectly gapped at 1.5mm :bang:
5. Jacked up the car and used another jack as saftey. Crawled underneath and located the sensor. The gap seems to be fine between sensor and the teeth. I thought of exchanging the sensor with my car to pinpoint the culprit. The socket was located infront of the radiator and secured with a metal wedge plate. I tried to remove but in vain.
6. Removed the other ecu socket which has the sensor wiring attached. Gave a good clean with wd40 and inserted it back.
Half heartedly cranked the car viola the beast came alive:woot:
Conclusion:
It could be a loose ecu socket connection but looking into the condition of the ecu socket I suspect it could be a issue with the sensor socket connected to the wiring harness. The socket is placed perpendicular to the ground. This causes the water penetrates into the socket connection and evaporate leaving salty residues. This cuts off the socket connection. When I fiddled the sockets some how the residues shooks off. Ecu uses crank sensor input to locate cyl1 piston tdc. When it fails there will be no voltage in the spark plug.
Question to the Forum members:
Can someone tell me how to remove the crank sensor from the socket. Picture worth thousand words.
Regards,
Vijay
It was my friend's Adventure 1.6 petrol decided to play a bit. Couple of days after the car wash, it simply refuses to start. It cranks fine but didnt start. The only option is to tow the car to the service station(Read $$). He seeked my help and I gave a try to make the beast come alive.
Analysis
Day 1 late evening:
1. Cranks are healthy but the engine didnt start.
2. Suspected fuel pump and relay. Gave a dose of WD40 to all the connector and relays to remove water if any.
3. Checked the fuel pump relay and its good and no over heating.
4. removed the fuel pipe and turned the ignition on. Petrol erupts from the hose eliminates fuel pump failure.
5. checked the exhaust pipe for any blockage. As the kids around.. there is a possibility. Every thing seems fine but refuses to start.
6. checked the airfilter box and its good too.
7. Removed the ecu socket it was clean. Didnt open another set of socket.
Day 2 early morning:
1. With a multimeter, checked the primary and secondary ign coil and found to be within the range.
2. Checked the MAP sensor output and the voltage is 4.99V. Now I assume ecu is working
3. Removed the cyl 1 sparkplug connected to the HT wires and cranked- No spark.
I somehow relieved guessing the culprit must be crank position sensor.4. Corrected the plug gap as its incorrectly gapped at 1.5mm :bang:
5. Jacked up the car and used another jack as saftey. Crawled underneath and located the sensor. The gap seems to be fine between sensor and the teeth. I thought of exchanging the sensor with my car to pinpoint the culprit. The socket was located infront of the radiator and secured with a metal wedge plate. I tried to remove but in vain.
6. Removed the other ecu socket which has the sensor wiring attached. Gave a good clean with wd40 and inserted it back.
Half heartedly cranked the car viola the beast came alive:woot:
Conclusion:
It could be a loose ecu socket connection but looking into the condition of the ecu socket I suspect it could be a issue with the sensor socket connected to the wiring harness. The socket is placed perpendicular to the ground. This causes the water penetrates into the socket connection and evaporate leaving salty residues. This cuts off the socket connection. When I fiddled the sockets some how the residues shooks off. Ecu uses crank sensor input to locate cyl1 piston tdc. When it fails there will be no voltage in the spark plug.
Question to the Forum members:
Can someone tell me how to remove the crank sensor from the socket. Picture worth thousand words.
Regards,
Vijay
