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Dan
Dan, Technician
Category: Buick
Satisfied Customers: 23590
Experience:  Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
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Buick: i was driving down the street when it loss all power

Customer Question

i was driving down the street when it loss all power couldnt get it to go more than five miles an hour and now it will start but it seems to shake and cannt get it to even idle
Submitted: 1 year ago.
Category: Buick
Expert:  Dan replied 1 year ago.
Hello, my name is ***** ***** I'm here to help get your problem solved. What year, model, and engine size?
Customer: replied 1 year ago.
91Buick century 6cylinder
Customer: replied 1 year ago.
3.3 engine
Expert:  Dan replied 1 year ago.
Is the check engine light on? Does it flash?
Customer: replied 1 year ago.
yes it's on but don't blink
Expert:  Dan replied 1 year ago.
Have you checked the codes? If so, what are they?
Customer: replied 1 year ago.
the people at the parts store said that the mass air flow sensor was bad the knock sensor the oxygen sensor and the idle sensor they also said that if one of those go bad it can trip codes for the rest of them
Expert:  Dan replied 1 year ago.
Unplug the mass airflow sensor and see if it runs better. Let me know, thanks.
Customer: replied 1 year ago.
it has a little more power but not much
Expert:  Dan replied 1 year ago.
Check to see if every cylinder has good spark or if some cylinders are missing spark. Let me know, thanks.
Customer: replied 1 year ago.
all cylinders are firing
Expert:  Dan replied 1 year ago.
You checked spark?
Customer: replied 1 year ago.
yes I put new plugs in it and my neighbor popped the wires and it through a spark
Expert:  Dan replied 1 year ago.
Was check engine light on before this happened? Or did check engine light come on at same time it started running rough.
Customer: replied 1 year ago.
about the same time
Expert:  Dan replied 1 year ago.
Ok, lets start by checking codes then so I know exactly what we are dealing with.
Customer: replied 1 year ago.
well like I said when they ran the codes it come back mass air flow knock sensor oxygen sensor now would it do this if the map sensor loses the vac line
Expert:  Dan replied 1 year ago.
Yes, it would run rough if the map sensor was not getting correct amount of vacuum. Has that been checked?
Customer: replied 1 year ago.
not for sure where it's at can it also cause the power loss
Expert:  Dan replied 1 year ago.
Here is a picture https://www.dropbox.com/s/gsxggyjvsr0q8tg/map.pdf?dl=0

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