What causes a Ford F-150 engine to misfire?
Damaged fuel lines cause the engine to misfire and can possibly start a fire in the engine. Dirt or rust in the fuel tank will clog the filter. This is more of a problem for older trucks than newer models. Figure 2.
How to diagnose misfire codes for Ford 4.6L?
P0308 Cylinder #8 Misfire. 1 1 Misfire. 2 P0302 Cylinder #2 Misfire. 3 P0303 Cylinder #3 Misfire. 4 P0304 Cylinder #4 Misfire. 5 P0305 Cylinder #5 Misfire. 6 P0306 Cylinder #6 Misfire. 7 P0307 Cylinder #7 Misfire. 8 P0308 Cylinder #8 Misfire.
When to replace spark plugs for a misfire code?
It is important to replace all spark plugs when repairing any misfire trouble code. Only replacing the spark plug for the misfiring cylinder may result in other cylinders misfiring afterwards. If there are other related codes stored in the powertrain control module, be sure to inspect and diagnose those codes.
Can a misfiring cylinder cause another cylinder to misfire?
Only replacing the spark plug for the misfiring cylinder may result in other cylinders misfiring afterwards. If there are other related codes stored in the powertrain control module, be sure to inspect and diagnose those codes. It is also important to make sure the spark plugs have been precisely gapped.
What was the code for the Ford F150 misfire?
I had this code: P0354 Ignition Coil D Primary/Secondary Circuit Malfunction. After reading through the forums, I found that the problem was most likely spark plugs or coils over plugs (COPs). I first replaced all of the spark plugs. They did not look too bad, except the plug #4.
Why does my Ford F-150 sputter and misfire?
The specific coil pack for your truck should look similar to these. A clogged fuel filter in a Ford F-150 or F-250 truck will cause its engine to sputter and misfire. Replacing the filter should help sort the misfiring problem, but if misfiring persists it can also indicate a faulty fuel injector.
Why does my Ford truck have a misfiring spark plug?
For that reason, checking the spark plugs is a shortcut towards checking engine health. Antifreeze leaking into the spark plug tubes or intake manifold will result in an engine misfiring, too; although in this case, you likely also have a blown head gasket. Figure 4.
What causes a p0301 problem on a Ford F150?
There are quite a few things that can cause the P0301 trouble code to trigger the Ford F150 . Here are the most common problems that will throw the code. They are presented somewhat in order from most to least likely to be causing the code: Bad Spark Plugs – Spark plugs are one of the most common causes of P0301.