Texas5.0

Mechanic working on my car said that while the car was running at full operating temp he unplugged the mass air. Car did not die. He said it made no change. He seems to think that this should have cause some kind of idle problem and the car should have died.

Thoughts?

Mustangkiler

From what i learned it should not die it should fall back on pre programmed tables within the computer but they are very generic. Im sure others like adder or samseed could give a lot more detail. It is a good way to find out if u got a bad mass air, if it runs a lot better when u unplug it then its bad. If it does not change it would sya to me its fine.

AdderMk2

your car will still run with the MAF disconnected.... but it should not run well

Derf00

It will not die, it will however, under load misfire or have a complete lack of power.

Texas5.0

So if the car is idling poor (constant searching for idle) and I unplug the mass air and the car idles fine. What would be the reason?

bigjbuff28

my car used to die randomly when i would be going slow until found the problem was the mass air was unplugged, plugged it back in and hasnt died since

F250sd

Would seem as if you either have a bad mass air sensor. A bad mass air could be giving the engine the wrong signal (most likely it is), so when you unplug it, the computer goes to it's programming (like was stated earlier) hence the better idle.

OnyxCobra

I know my car will idle without the maf, but that was before the head/cam swap.

HemiTCoupe

I drove from Mn to Tn and back 4+yrs ago, with themasunpluged and the only thing it did was to gine me a engine light evey so offen, it ran the same, and still runs good to this day.

Pat

slickshift

He's wrong
I'd stop going to him