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Ask Canuck Tech Your Own Question
Canuck Tech
Canuck Tech, Auto Service Technician
Category: Car
Satisfied Customers: 532
Experience:  Red Seal Journeyman Technician, 20 Years experience
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car will start but idles rough. stalls and dies. can keep it

Customer Question

car will start but idles rough. stalls and dies. can keep it at 2000 rpm and stays running. below it ruff idles and dies. changed mass air sensor, idle air control valve, evap purge valve, egr valve, fuel injectors,spark plugs
Submitted: 5 years ago.
Category: Car
Expert:  Canuck Tech replied 5 years ago.

Canuck Tech :

Is the check engine light on?

Canuck Tech :

Did you change the PCV valve by chance? Was there any running conditions that occurred before the vehcile started to run very rough? Do you have access to a scan tool?

Canuck Tech :

How many miles?

JACUSTOMER-chjdalkj- :

YES THE CHECK ENGINE LIGHT IS ON. NO ON THE PCV VALVE. NO SCAN TOOL. ENGINE WOULD OCASIONALLY BLOW OFF THE VACCUME LINE FROM THE EVAP PURGE VALVE TO THE AIR INTAKE. 140,000 MILES.

Canuck Tech :

Did this start suddenly? The first thing that comes to mind is that the timing chain has skipped. Have you had the car since new, and how frequently did the oil get changed?

Canuck Tech :

Compression test results would also be handy. I would get a spark tester, and make sure you have good spark at all the cylinders - a blue spark. I would also get a noisd light, and check for injector pulse at all the injectors

Canuck Tech :

Another trick is to unplug the mass airflow sensor, and it will run off the MAP sensor. If there is no change in the way it runs, this would rule out the MAF. You can also do the opposite - unplug the MAP and have it run off the MAF, to rule out the MAP as a cause