ali_viento
15+ Year Contributor
- 117
- 3
- Feb 26, 2007
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Dubai,
Asia
Hey, I have this issues from 2 years ago and since i was super busy on my work then i couldn't find time to tackling anymore , but from the last week i starts again and checked many things .
Why i said weird cause its changing its behavior each time we wants to getting starts , it means sometimes the engine crank with no starts then i try to push the gas pedal several times to starts , sometimes its takes more time to starts with 2 cylinder and no injector pulse on random cylinders ( maybe cyl 1 and 2 but the next time its can completely different cylinders ) or even sometimes its get starts with 3 cylinders like one time has no pulse on injector #1 , another time no pulse on injector #3 but when the engine getting warm all the injectors firing without any problem , also you can turning off the car and again starts smoothly , I must mention that today after starts with 3 cylinders with no pulse on injector #1 , its getting fire on cylinder #1 few mins later but engine hesitating when push the gas rapidly and its fine revving if push the gas slowly , you can see on the log i attached .
We have sparks , we have fuel on fuel rail with 37 psi pressure , wiring harness and connectivity between ECU and Injectors are fine , between injector resistor and injector plugs also good , grounds fine , timing belt is correct at time , no sign of blown head gasket with perfect compression on all 4 cylinders , tested all this checklist with 1 or 2 good ones without any success : Coil , ignition wires , fuel filter , power transistor , injector Resistor box , map sensor , CAS , MPI relay, different set of Injectors , Ecu .
I really Confused since im working on dsm’s for many years and this problem is unique but maybe there is something that you can help me or trace it from the logs . Sorry for long story and thank you for your time .
Why i said weird cause its changing its behavior each time we wants to getting starts , it means sometimes the engine crank with no starts then i try to push the gas pedal several times to starts , sometimes its takes more time to starts with 2 cylinder and no injector pulse on random cylinders ( maybe cyl 1 and 2 but the next time its can completely different cylinders ) or even sometimes its get starts with 3 cylinders like one time has no pulse on injector #1 , another time no pulse on injector #3 but when the engine getting warm all the injectors firing without any problem , also you can turning off the car and again starts smoothly , I must mention that today after starts with 3 cylinders with no pulse on injector #1 , its getting fire on cylinder #1 few mins later but engine hesitating when push the gas rapidly and its fine revving if push the gas slowly , you can see on the log i attached .
We have sparks , we have fuel on fuel rail with 37 psi pressure , wiring harness and connectivity between ECU and Injectors are fine , between injector resistor and injector plugs also good , grounds fine , timing belt is correct at time , no sign of blown head gasket with perfect compression on all 4 cylinders , tested all this checklist with 1 or 2 good ones without any success : Coil , ignition wires , fuel filter , power transistor , injector Resistor box , map sensor , CAS , MPI relay, different set of Injectors , Ecu .
I really Confused since im working on dsm’s for many years and this problem is unique but maybe there is something that you can help me or trace it from the logs . Sorry for long story and thank you for your time .
Attachments
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inj 1 firing few mins later when getting warm.elg349.8 KB · Views: 134
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rev good when slowly push the gas but hestitation when rev fast.elg38 KB · Views: 79
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Starts with 1st injector not firing.elg412.4 KB · Views: 120
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Starts with 2 cylinders.elg648.3 KB · Views: 118
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starts with 3rd injector not firing.elg106.9 KB · Views: 133
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