Q: 1994 f150, new maf but still won’t start with it plugged in, unplugged will start and run rough.

asked by on March 04, 2018

My f150 despite having a new maf sensor still won’t run with it plugged in. When it’s unplugged the truck will start and run but kinda rough. I did a self check on codes and these are the ones that I got 625, 113, 157, 158. I did a reset on the computer and it’s still doing it. There’s definitely spark and the engine turns over but then will die immediately. But again Unplugged it starts up and runs. What do I look at? Also is there something besides my brand new maf sensor and assembly that can cause the computer to get a bad reading from the maf and shut off the engine? Please help.

My car has 204000 miles.
My car has an automatic transmission.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Is it Necessary to Replace the Tensioner With the Timing Belt?
Automatic belt tensioners (https://www.yourmechanic.com/article/how-belt-tensioners-work) usually have a visible tension range indicator on the tensioner. When you install a new belt (https://www.yourmechanic.com/services/timing-belt-replacement), check the tension indicator to verify that the arrow on the tensioner arm is pointing to the range on...
How does the compass display work?
If your Altima is equipped with a compass display, you’ll find it in the automatic rearview mirror. It measures magnetism and it can help you determine which direction your car is headed (north, south, east, west, only – it doesn’t...
How do I use the rear window washer?
The rear window washer provides extra visibility out of the rear window, by spraying it with washer fluid and wiping it away. To use this feature, rotate the left band on the Windshield Wiper lever all the way forward, or...
Is there any way I can bleed brakes without a scanner or special tool? Thanks!
Hello. If you are not able to get pressure to come to the calipers, you will have to use a scan tool to activate the bleed function of the abs. Otherwise, you will not be able to get fluid out...
Fan doesn't come on unless defrost is on.
Hi there. I am assuming you are referring to the radiator cooling fan (https://www.yourmechanic.com/services/cooling-radiator-fan-motor-replacement). If it works when the AC or defrost is on and not when the engine starts to warm up, then that can be a circuit issue...
2012 Jeep weird sound at front end
Hello. Thanks for writing in. When it comes to strange noises, the best thing to do is locate the exact place its coming from. The first test should be trying to replicate the noise while at idle. If you can...
Alfa giulietta clutch replacement -garage said £1000 as its 3 parts, not the normal 2 is this right??
Hi there. Since we only provide services on vehicles in the United States, we're not quite the right resource for you to ask about repair services outside the United States. However, in the United States, replacing a clutch on a...
Radio and control display lights not working
Hi there. In some cases, this is a problem with the light switch, located on the left side of the dashboard which allows you to adjust the brightness on the dash. It's also possible for one of the light bulbs...
Automatic transmition hit
Having a Jetta in the family, I think I know what you are referring to. When the transmission shifts from 1st to 2nd gear, it shifts very hard. It feels almost like someone bumped into the back of the car....

Related articles

2011 Dodge Ram vs. 2011 Ford F-150: Which One Should I Buy?
Large trucks can be fun to drive, and even more fun to get dirty. Unfortunately, they may also cause you to get phone calls from friends who need to move into a new apartment. Fortunately, just having a truck may...
2012 Ford Fusion vs. 2012 Toyota Camry: Which Should I Buy?
While most people believe that domestic sedans just cannot compete with the Honda Accord and the Toyota Camry, the industry leaders, that is not necessarily true. Yes, there are some metrics where the Camry just excels, however the Ford Fusion...
The Best Used Cars to Buy for Towing Light Loads
Towing Towing is tricky business and depending on the weight you’re dealing with, it really determines what vehicle is best for you. If it’s light loads you’re looking at towing, we’ve put together a list of the top five cars...