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cold start runs rough..stall..only done 144thou klms light work.

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6/1994 Exell.on cold start runs...
6/1994 Exell.on cold start runs rough clouds of unburnt fuel and after warm up seems to be missing/intermittent....will occassionaly stall.has only done 144thou klms light work. I have had it scanned a couple of times without result.Any suggestions/?Andrew.
Submitted: 5 years ago.Category: Car
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Answered in 39 minutes by:
6/4/2012
Auto Mechanic: Tom, ASE Certified Technician replied 5 years ago
Tom
Tom, ASE Certified Technician
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Satisfied Customers: 25,968
Experience: ASE Certified Master Technician
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Can you communicate with the ECM ? Was the mass air flow sensor replaced along with the headgasket ?
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Customer reply replied 5 years ago

this model has air flow metre..no MAF sensor.head gasket not replaced Idont have scan tool to comm with ECM.

Auto Mechanic: Tom, ASE Certified Technician replied 5 years ago
Ok air flow meter is the same as a mass air flow was this replaced ?
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Customer reply replied 5 years ago
new plugs and leads new coil new crank sensor newfuel pump and filter and press.reg new oxy sensor. second hand flow metre s/h ECM s/h idle solenoid.car mostly runs well starts well lots of power..not running hot..using heaps of fuel..maybe 5 ks to the litre
Auto Mechanic: Tom, ASE Certified Technician replied 5 years ago
Ok if this vehicle is dumping fuel you need to replace the air flow meter . This will cause this issue . I would start here does with a new factory o2 sensor.
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Customer reply replied 5 years ago
Doc 74... I would agree with you re air flow metre BUT after the problem started it was the first thing I changed. yesterday I tried another metre...So how likely 3 metres are at fault. I would try a new metre if I could get one at reasonable price. Any clues?
Auto Mechanic: Tom, ASE Certified Technician replied 5 years ago
It still can be an issue if the air flow meter is bad . Also does the engine light come on then go out for its self check when cycling the key?
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Customer reply replied 5 years ago
doc 74you dont seem to be hearing what I am saying..I have been answering your questions you are not answering mine so I will just put up with the car as it is. thanks for your time.Andrew Philip.
Auto Mechanic: Tom, ASE Certified Technician replied 5 years ago
Yes I have been answering yours . It's possible that each air flow meter if it's not factory is bad as well as a possible shorted ECM can cause this . These along with a faulty fuel pressure regulator and faulty coolant temperature sensor will cause this issue . Hoped this helped . Positive feedback and bonuses greatly appreciated.
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Customer reply replied 5 years ago
are still not reading my responce to you...Ihave fitted new fuel press reg.I cant believe I have fitted 2 not including the original flow metres that are faulty. at those odds there wouldnt be a car on the road. I will give you points for the temp sensor... hadnt thought of that. it must now be the case that 2 accredited dealers have failed to scan/deffault the problem. so.. do I ask the EXPERTS to re scan for ECM short and temp sensor or dont the scan tool diagnose those.
Auto Mechanic: Tom, ASE Certified Technician replied 5 years ago
Tell them just to physically test the sensor and send the ECM out to be tested properly where they actually open it up and check the printed circuit board.
Tom
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