Cranking but not starting

KC1284

MEMBER
2003 FORD RANGER
3.0L
V6
2WD
AUTOMATIC
171,000 MILES

I recently bought this truck. The previous owner said it hasn't run in months and needs to be looked at. I tried starting it and it's a dry crank with no pops even attempting to start. The exhaust smells like nothing. I replaced the ignition coil pack and now it pops and the exhaust smells heavily of gas. The truck has no codes or check engine light. What should I look at next? Is there a reason why the air fuel mixture is so off? Could it be the crank or cam sensor?

1 Reply

JACOBANDNICKOLAS

MECHANIC
108,400 POSTS

Hi,

There are a few reasons that can cause a rich fuel mixture. First, high fuel pressure can be the cause. Also, a faulty engine coolant temperature sensor can also cause it.

Since you are hearing a pop (backfire), it sounds like you are getting spark. However, the plugs could be fouled if they are wet with gas.

Here is what I suggest: Remove a couple of the spark plugs and see if they are wet with fuel. If they are, then I want you to check for ignition spark to the plugs. Here is a link that explains how that is done:

https://www.2carpros.com/articles/how-to-test-an-ignition-system

If there is spark, I would next check the fuel pressure to confirm it isn't too high due to a faulty pressure regulator. Here is a link that shows in general how it's done:

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Let me know what you find. Also, I attached the fuel pressure specifications below. Let me know what they are.

Take care,

Joe

See pic below.

Image (Click to make bigger)