Low speed hesitancy...

[Msfitoy]

Yes, I know this subject is not new and I have seen many posting around this subject. But every one is different and doesn't quite fit my truck's behavior. As many of you know, I have one of the highest mileage 5G here (90K) and she's been just about perfect in every aspect. Lately, I've noticed a peculiar behavior after starting my truck (cold or hot). When I put her in gear and creep off standstill (1-2mph) to maneuver around parking lot or my driveway, the throttle hesitates as if like a switch turning on and off. This makes it very difficult to drive slowly. If I put more gas in, everything is ok but I'm going faster than desired. After driving for a few minutes, starting off a stop will be normal again. If I shut it off and immediately drive off slowly, same hesitation occurs. According to all the other posting about hesitancy, is this pointing out to a failing injector(s)? Confused...

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[Elgorr4]

Have you done plugs yet? I imagine you have, but if not you are definitely due at 90k and should look there first. The fact that it does it every time you shut it off points a little more to the injectors, like they are taking awhile to build pressure back up or something.

 

[Msfitoy]

Have you done plugs yet? I imagine you have, but if not you are definitely due at 90k and should look there first. The fact that it does it every time you shut it off points a little more to the injectors, like they are taking awhile to build pressure back up or something.

I have replaced my plugs at around 50K even though they looked serviceable for another 20K...so these plugs should be good...your point about injector pressure sounds likely...

 

[lost1]

Throttle position sensor?

 

[Cabose-1]

Throttle body is dirty, tpms sensor, something of that nature is what you are probably looking at. And most noticeable at low speeds or when the throttle is in the most closed position.
Be careful when cleaning throttle body, some are very sensitive pieces of equipment. Just watch many videos at the university of you tube.
Throttle bodys and similar components and sensors tend to get a little dirty after 90k. Mass air flow sensor? Does turbo have em? My first turbo engine.

Well good luck, let us know what you find out

 

[Msfitoy]

Throttle body is dirty, tpms sensor, something of that nature is what you are probably looking at. And most noticeable at low speeds or when the throttle is in the most closed position.
Be careful when cleaning throttle body, some are very sensitive pieces of equipment. Just watch many videos at the university of you tube.
Throttle bodys and similar components and sensors tend to get a little dirty after 90k. Mass air flow sensor? Does turbo have em? My first turbo engine.

Well good luck, let us know what you find out

That's worth a check...is the TB hard to get to? I've done that sort of cleaning many many times with my MINI and Turbo SS...

 

[SilverSlugger]

Might be time for an upgrade.....

2019 Ford Ranger 2.3L EcoBoost BBK 65mm Power-Plus Throttle Body 1894 (stage3motorsports.com)



Edit: Nevermind, the more I'm looking at this it won't work for our Rangers.

 

[Msfitoy]

Might be time for an upgrade.....

2019 Ford Ranger 2.3L EcoBoost BBK 65mm Power-Plus Throttle Body 1894 (stage3motorsports.com)



Edit: Nevermind, the more I'm looking at this it won't work for our Rangers.

Just checked with my freelance Ford Tech who will be doing my trans flush...he's pretty sure it's the coil(s)....we shall see...

 

[Wytchdctr]

Hope it is something easy. If the coils don't do it I wonder how badly carboned the intake valves are at 90k in this engine.

 

[Toytec]

I don't think it's the coils. I think it's carbon build up on the throttle plate.
Easy to get to. Get some throttle cleaner, and a soft bristle tooth brush.

 

[Msfitoy]

Hope it is something easy. If the coils don't do it I wonder how badly carboned the intake valves are at 90k in this engine.

Ignorance is bliss lol...I'm sure it'll be fine...my wife's 2011 Explorer has over 200K well maintained miles...no head issues and running great...

 

[Cabose-1]

Not to sure where the throttle body is. Not to up to date on turbo engines. Never worked on emso have a vague knowledge on how rhe exhaust is rerouted and all that good stuff.

I know howbit works on paper. Just not in practice.

 

[bRaptor]

Sounds like you need to jam on the gas under load to clean it out.

 

[9zero1790]

could it be as simple as bad tank of fuel? could not hurt to put a can of seafoam in the tank and run it through.

 

[JasonTremor]

I would guess dirty throttle plate sticking to throttle bore. The crankcase ventilation is generally sucked in right behind throttle plate and it literally gums up the mechanism. I've seen it happen on other vehicles, but haven't dug that deep on the ranger throttle design. Generally happens on initial start and frees up for the duration of the drive.

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