Rough Idle/ Stall, Very Hard To Start, Tried usual suggestions - Toyota Yaris Forums

ncp13 · 04-25-2017, 05:40 AM

You have fuel when cranking but how much fuel? Check fuel pressure and check if it holds pressure when you turn it off. (44-50 psi idle) after 5min eng off at least 20psi pressure hold.
Your injectors could be leaking causing rough running and misfires.

You can also check the resistance of the injectors 13-14 Ohms at 20C (68F)

It gets expensinve when you are just replacing stuff. Diagnose first then replace. All the inspections are listed in the repair manuals ask for help and we can get you the information. :)

Good luck !

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04-25-2017, 05:40 AM	#12
ncp13 Drives: 01 Yaris TS Join Date: Jan 2017 Location: Athens Greece Posts: 92	You have fuel when cranking but how much fuel? Check fuel pressure and check if it holds pressure when you turn it off. (44-50 psi idle) after 5min eng off at least 20psi pressure hold. Your injectors could be leaking causing rough running and misfires. You can also check the resistance of the injectors 13-14 Ohms at 20C (68F) It gets expensinve when you are just replacing stuff. Diagnose first then replace. All the inspections are listed in the repair manuals ask for help and we can get you the information. :) Good luck !