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We have a Vauxhall Zafira 56 registration fitted with a

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Hi, We have a Vauxhall Zafira...
Hi,
We have a Vauxhall Zafira 56 registration fitted with a 1.6lt twin port petrol engine, the fault we are experiencing is: car starts from cold normally with an idle speed of 1,100, runs well for first mile and then for no apparrant reason wants to stall until the engine has done approx 6 or 7 mile and then seems to be ok and runs normally. We have also experienced on some occasions a loss of power when trying to accelorate but on other occasions it accelorates normally. Do you think there could be some type of sensor problem?
Thanks.
Submitted: 8 years ago.Category: Car
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Answered in 3 minutes by:
7/1/2010
Auto Mechanic: Tom, ASE Certified Technician replied 8 years ago
Tom
Tom, ASE Certified Technician
Category: Car
Satisfied Customers: 26,066
Experience: ASE Certified Master Technician
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Sounds like a faulty mas air flow sensor.Was this checked . Is the check engine light on?
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Customer reply replied 8 years ago

No the check engine light is not on.

Auto Mechanic: Tom, ASE Certified Technician replied 8 years ago
Ok has the mass air flow sensor been checked?
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Customer reply replied 8 years ago
Have fitted a new mass air flow but it has made no difference. This engine i believe is fitted with a twin port device which recirculates exhaust gases and can be problematic with stalling and lack of power, could this be the fault? On most occasions the engine runs absolutely fine and only seems to be a problem between warming up periods and on occasions when warm but underload there seems to be very little power. If you think this could be the problem is it possible to disengage this system and if so how?
Customer reply replied 8 years ago
Hi did u receive this reply
Auto Mechanic: Tom, ASE Certified Technician replied 8 years ago
that can very well be the issue. Did you use a factory or aftermarket mass air flow sensor?
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