I keep getting a p0302 (misfire cylinder 2)

Maintenance/Repairs
,
1

I keep getting the same code even after i replaced the plugs wires and coil packs on my 96 ford ranger any ideas on what it might be?

2

Have you tried swapping the fuel injector from cylinder 2 with an injector from another cylinder to see if the miss moves with the injector?

Tester

3

I have. The misfire stays on cylinder 2

4

Have you tried a leak-down test on cylinder #2?

Tester

5

A what? Explain please?

6

Leak-down test.

Apply compressed air into a cylinder while the piston is at top-dead-center.

This will indicate if there’s a problem with the valves, rings, head gasket, etc…

Tester

7

Perform a compression test . . . dry AND wet

Please give us the numbers for all cylinders

No parts swapping necessary for such a test, either

8

If your engine is the 3.0L flex fuel model the purge valve

http://www.autozone.com/emission-control-and-exhaust/canister-purge-valve/duralast-canister-purge-valve/ford/ranger-2wd/1996/6-cylinders-u-3-0l-mfi-ohv/184293_658681_18278

may be leaking and causing a misfire on cylinder 2. That valve is located on the drivers side inner fender near the battery.

9

It’s a double pluged 4 cylinder rwd

10

In that case remove the valve cover and check for a tossed rocker.