Throttle Body Cleaning

[Dereku]

Well decided to do some maintenance on my wife’s Expedition today. 80k miles and TB is front and center on it. Little carbon but not bad. Got me thinking, I never did the ranger.

Almost 144k today. Back of throttle plate was black. Took a bit to clean it but after that and the relearn it drives great. Very snappy throttle response. Well worth a look if you haven’t yet.

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[21rangerCactus]

You took it completely off?

 

[Dereku]

Yes probably 30 minutes beginning to end. But i have aftermarket intercooler pipes. Not sure if that makes it easier. Also cleaned the Air intake sensor on the rear part of the intake. It was caked in carbon and nasties. This is what I get for reading up on 3.5 maintenance. Gives me ideas for my truck too.

 

[Friday yet?]

Good stuff! And totally beyond my capabilities/comfort zone.

 

[airline tech]

Yes probably 30 minutes beginning to end. But i have aftermarket intercooler pipes. Not sure if that makes it easier. Also cleaned the Air intake sensor on the rear part of the intake. It was caked in carbon and nasties. This is what I get for reading up on 3.5 maintenance. Gives me ideas for my truck too.

I would say - cleaning the (MAPT Sensor) The sensor mounted above the DPFE Sensor gave you the most noted drivability difference if it was carboned up.

Depending on the severity of the carbon build up a light coating would cause a - slowed response time in - Pressure Changes within the manifold, so if cleaning provided a snappier throttle - I suspect this provided the most noted difference however if the edges of the throttle plate had some carbon build up on the edges of the plate, would also give up a better throttle response.

Anyway, if by performing some simple (Preventive Maintenance) gave you a better running engine - Its all GOOD

This sensor plays a important role in engine control authority

The MAPT sensor system combines absolute intake manifold pressure (MAP) with intake air temperature (IAT2) to provide the PCM with a real-time engine load calculation used to determine fuel delivery and ignition timing, validate EGR system operation through expected intake pressure response, accurately model engine torque, and manage load-based transmission shift scheduling and drivability control.

 

[Racket]

Aw shoot, now I want to figure out how to check and do this. Sounds like a good Saturday project. I presume sensor-safe cleaners and wonder how likely I'd need to do this, having changed the DPFE sensor sometime around 50K miles. I have one of the first dual vacuum UPR catch cans and always figured it would keep nasty stuff out of the intake but this would be a way to validate it.

 

[Dereku]

I would say - cleaning the (MAPT Sensor) The sensor mounted above the DPFE Sensor gave you the most noted drivability difference if it was carboned up.

Depending on the severity of the carbon build up a light coating would cause a - slowed response time in - Pressure Changes within the manifold, so if cleaning provided a snappier throttle - I suspect this provided the most noted difference however if the edges of the throttle plate had some carbon build up on the edges of the plate, would also give up a better throttle response.

Anyway, if by performing some simple (Preventive Maintenance) gave you a better running engine - Its all GOOD

This sensor plays a important role in engine control authority

The MAPT sensor system combines absolute intake manifold pressure (MAP) with intake air temperature (IAT2) to provide the PCM with a real-time engine load calculation used to determine fuel delivery and ignition timing, validate EGR system operation through expected intake pressure response, accurately model engine torque, and manage load-based transmission shift scheduling and drivability control.

Thanks for the insight. Thought it looked funny compared to the Air temp sensor on the 3.5 in roughly the same location. It had extra parts inside. And it was caked. Poked it with a toothpick first.

the throttle plate hard carbon on the entire circumference. It was definitely in need of a cleaning. The 3.5 with half the miles, and dual injection looked brand new by comparison.

Little things I forgot about but the expedition is newer to us and I am going through everything and it jogged my memory.

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