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2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

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Old 04-03-2014
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Icon5 Help! Hesitation when starting

I changed my oil and fuel filter over the weekend. When removing the fuel line from the filter(the one with the green clip) the clip snapped in half. The clip is still in there and the line snapped back in when hooking up the new filter. Since then though when starting the truck there is a little hesitation like the pressure has been released in the fuel line. Is it the clip that is causing this? there is no fuel leak at all. I don't think this has anything to do with it, but I did change to a synthetic blend oil for the first time this oil change. That is the only two things I did then it started to do this. Any help would be awesome. If this is in the wrong sub-forum I'm sorry.
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Old 04-03-2014
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Cycle the key to ON, count to 3 then turn key off
Do that twice, then try to start.

The computer only turns on the fuel pump for 2 seconds when key is turned on, so you are "priming" the system 3 times to increase lost pressure, if it is indeed leaking.

If this makes it start without delay each time over the next few days then it could be you are losing pressure.
But it may also just be some air in the filter, which will come out within a few days.

You should have gotten new clips with the fuel filter?
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Old 04-03-2014
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From what I've read this green clip is attached to the fuel line and can not be replaced without replacing the whole line. Thanks for that though. I'll give that a try on my way to work.
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Old 04-03-2014
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Also if it is leaking and then losing pressure would it not also leak fuel?
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Old 04-03-2014
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Yes, pressure loss would leak fuel, unless it is losing pressure in the gas tank, i.e. a leaking check valve or crack in hose, so fuel just leaks back into tank.
Other, no outside leak loss, could be an injector, some dirt got in the line while putting on new filter and has lodged in an injector so it is not closing tightly, causing a slow pressure/fuel bleed into intake.
You could get a fuel pressure tester and check for slow leak

But air in a pressure system can be a funny thing, i.e. brake and clutch bleeding

Your fuel system has no return line so the only way out for air is thru the injectors, and the shape of the fuel filter allows for an air pocket, it will self purge over time.
The air can expand and contract with pressure more than gasoline or brake fluid, which is why air in the lines is a PITA.
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Old 04-03-2014
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Turning the key 3 times worked. It's not leaking outside at all that I can tell. If the injector had dirt lodged in it, you think one of the fuel system cleaners you put in the tank would get it or would I actually need to get it serviced? Thanks again for the help.
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Old 04-03-2014
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Seafoam does a good job in the gas tank, I use it once a year, $8

If there is some grit in an injector it may or may not clean it out, but it for sure wouldn't hurt.

Auto parts stores often loan or rent tools like fuel pressure testers, that would be the first step, determine if you have a pressure leak and how much of one.
Servicing injectors would be at the very end of the list.

After driving for at least 20 minutes, shut off engine and remove the air plenum(big air tube going to air filter) from the intake manifold, open throttle and then smell for a gasoline smell, blow into intake to circulate air then smell again.

When you turn the key off the injectors stop opening, but engine spins a bit until it dies, this pumps out most of the air/fuel mix still in the intake so there should be no smell of fuel in the intake.
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Old 04-04-2014
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Okay, I did that and there was still a pretty strong smell of gas in the intake. So does that mean that I have an injector still open a little?
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Old 04-04-2014
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Could be that.

On the fuel rail there is a Pulse Damper, it will have a vacuum line attached.
Remove vacuum line and check it for fuel or fuel smell.
Long shot.

There is a "clear flooded engine" routine in all EFI computers:
Turn key on
Press gas pedal to the floor and hold it there
Crank engine

When you press the gas pedal to the floor with key on/engine off the computer sees 5volts from throttle sensor(TPS), and no signal from Crank Position sensor(CKP), it will disable fuel injectors and is now in "clear flooded engine mode".
So when you crank the engine it will have spark but no fuel, so will not fire...or start.
Here is a short video of this test:

The poster starts engine first to show it is a running engine, then turns it off
Then turns key on, presses gas pedal to floor and cranks engine, he gets a "no start" as expected.
He then releases gas pedal and engine starts normally.
Warmed up engine is best since even a small leak of fuel would cause firing.

If you have a leaking injector and do this test you will get intermittent firing while cranking since one injector is leaking fuel(assuming just one, lol).

If this happens, then in theory, you could disable one spark plug at a time, and repeat test, when firing stops that cylinder with no spark now would be the one with leaking injector.
So you could just get that one injector serviced.

Last edited by RonD; 04-04-2014 at 01:15 PM.
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Old 04-07-2014
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Well, I got a "no start".
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Old 04-07-2014
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Quote:
Originally Posted by jtc2086 View Post
Well, I got a "no start".
That's good, injectors are not leaking so look elsewhere for the problem.
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