My Ford f150 has a misfire on #4and#7 I checked the coils...

Q: My Ford f150 has a misfire on #4and#7 I checked the coils and plugs but they seem to be firing what else do I need to do

asked by on June 02, 2017

I have a misfire on #4and#7 I checked the plugs and coils they seem to be firing what Else could be the problem
My car has an automatic transmission.

In order to isolate the cause of the misfire you will need to do an engine compression and leakdown test to make sure the compression is good and no valves are burned. If compression test is good on all cylinders then you will need to remove lower intake manifold and have carbon cleaned out of the EGR ports and blown out with shop air to clear out all the carbon from intakes and EGR ports on cylinder heads.

Was this answer helpful?
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

Get a quote

What others are asking

Car wont start for locksmith because the computer system has to be reset due to sitting for so long, so he can read the codes?

It would be much easier to visit your local dealer to have the keys cut. The dealer will have all of the information necessary to have a key cut for you by the vehicle identification umber or VIN number. You...

With engine off. Crankshaft pulley spins freely with belt on or off. 96 Taurus 3.0. What could cause that?

I can think of a few possible causes to this issue. 1. You are trying to replace the belt with a new one and may have got the wrong size belt. There are two different 3.0 V6 engines that are...

Brakes out hitting hole

Hi there, thanks for writing in about your 2000 Ford E-250. Some master cylinders will let in just a little bit of air when the fluid is splashed around too much in the reservoir, which is likely what has happened to yours....

Related articles

The Check Engine Light Demystified
Your car Check Engine Light can mean many things. The Check Engine Light comes on when there's an electrical or mechanical problem with your car.
The Top 5 Selling Cars in Connecticut in 2012
Connecticut Connecticut offers plenty of rain and its fair share of snow during the winter months, which means drivers need vehicles that can handle these conditions. Top selling vehicles in previous years have included the Toyota Camry, Corolla and the...
How to Replace an EVP Position Sensor
The EGR valve is monitored by a valve position sensor. This sensor helps your car's EGR system to run more efficiently and better control emissions.