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Driving with MAF unplugged

Driving with MAF unplugged

Postby drobbins [OP] » Sep 29 2013, 5:28pm

Hey guys, as I posted earlier today I am having a problem with super rough idle and stalling upon cold start. When i unplug the MAF sensor the truck runs fine. So until i pinpoint the problem and fix it will it do my truck any harm driving around with the MAF unplugged?

While youre here could you take the time to look at my previous post and give some insight!! :D

Thanks guys!!

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Re: Driving with MAF unplugged

Postby Commando602 » Sep 29 2013, 5:33pm

Sounds like you either have a dirty MAF sensor or a defective one. If the MAF sensor is dirty it will send dirty info to the computer causing the truck to run bad. Remove the MAF and gently spray it out with "Mass Air Flow Sensor" cleaner only. Do not touch the little wire inside but gently spray it off with the cleaner. If that does not work then replace the sensor.

"will it do my truck any harm driving around with the MAF unplugged?" - Yes, you will get poor gas mileage and might also screw up other sensors. Driving around with the MAF off, your truck will try to learn the new settings and will trigger other sensors. It will be a domino effect so to speak.
Last edited by Commando602 on Sep 29 2013, 5:43pm, edited 3 times in total.
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Re: Driving with MAF unplugged

Postby drobbins [OP] » Sep 29 2013, 5:38pm

Hey commando, thanks for the reply. I should have mentioned that I have already cleaned my Maf sensor. That didn't solve the problem so I replaced it. My problem with super rough idle in the morning persists. I just want to know if I can leave my MAF unplugged without it doing any harm.
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Re: Driving with MAF unplugged

Postby gmcultr » Sep 29 2013, 5:48pm

Aftermarket maf sensors are problematic.... that's well documented. Did you get an oem one?

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Re: Driving with MAF unplugged

Postby drobbins [OP] » Sep 29 2013, 5:53pm

The brand is Dorman. Before I bought the Dorman one I tried an OEM one from the wreckers. Will it do any harm to my truck to drive with it unplugged??
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Re: Driving with MAF unplugged

Postby gmcultr » Sep 29 2013, 6:01pm

Maf is one of the few things id onky goe brand new oem on.

Will it hurt, if your truck k runs ok and is my shandy then yeah it should be ok.

After I first had my tune done I ran without a MAF for about two weeks with no real noticeable difference... but that was a lot of the time's doing.

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Re: Driving with MAF unplugged

Postby Commando602 » Sep 29 2013, 7:45pm

"will it do my truck any harm driving around with the MAF unplugged?" - Yes, you will get poor gas mileage and might also screw up other sensors. Driving around with the MAF off, your truck will try to learn the new settings and will trigger other sensors. It will be a domino effect so to speak. The MAF sensor tells the truck how to mix air & fuel, if there is something wrong the truck won't know it cuz there is no MAF sensor so the truck will not mix the fuel & air properly.
I still say the MAF sensor is the issue. Like the poster above said, install only a OEM MAF sensor and even then you could have a bad one. Also check to see if you are getting the proper voltage to the sensor then check your filter and intake. Check to see if it's not fouled up with feathers or other objects.
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Re: Driving with MAF unplugged

Postby gmcultr » Sep 29 2013, 7:49pm

Let me fix my phones poor autocorrects.

gmcultr wrote:Maf is one of the few things id buy brand new oem on.

Will it hurt, if your truck runs ok and isnt shakey, it will probably be ok for a short time.

After I first had my tune done I ran without a MAF for about two weeks with no real noticeable difference... but that was a lot of the tune's doing.

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Re: Driving with MAF unplugged

Postby Hildejake » Feb 21 2014, 5:21pm

I actually was doing the same thing for about a month or so and finally decided to take it to get diagnosed. It's not bad for your truck to run without the maf but you'll be getting terrible gas mileage. But it's better then running on the bad idle because you're misfiring which isn't good for the engine. Anyways I took mine in after doing everything I could to try and diagnose it myself and could figure it out all I knew is it was a vaccuum leak somewhere. Turn out the head gasket was leaking causing more air to get in which cause the rough idle. I'm not saying yours is it could also be something very simple such as bad spark plug or spark plug wire I also replace all these on my truck and it did nothing so that when I decided to take it in. I hope this helps I've read a lot of forums and never saw anything about a head gasket leak so maybe this will help you fix the problem.
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