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Throttle Body Cleaning


bowtie123

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Hi All,

Has anyone posted the method for getting to the throttle body?

I use to clean the one on my '99 Deville every two years (10,000 miles).

I removed the air cleaner and hoses and remove the three bolts on the

sensor to get to the throttle body

On the 2005 I do not see any bolts to remove to get to the throttle body.

I do not want to remove it, just clean it in place on the car.

Thanks,

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Get a can of GM upper engine cleaner (the liquid not the spray). Use a vice grip to lock the throttle body plate open, you can lock it at the stop, don't overdo the clamping force with the vice grip, just hold the plate open.

Use a tooth or detail brush to clean the throat and back of the plate, use rags to clean up, let it soak. Make sure you get the edges of the plate and where the plate contacts the throat. Don't get an excess amount of fluid down the throat you can hydrolock the engine (meaning don't pour it, etc). Take your time, it will take 30 minutes to do right. The back is the hardest part to clean. Don't use abrasive brushes (stainless or steel), you might get away with a brass brush, but don't scratch the throat. I took mine off and its easier but its still time consuming. Mike

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Get a can of GM upper engine cleaner (the liquid not the spray). Use a vice grip to lock the throttle body plate open, you can lock it at the stop, don't overdo the clamping force with the vice grip, just hold the plate open.

Use a tooth or detail brush to clean the throat and back of the plate, use rags to clean up, let it soak. Make sure you get the edges of the plate and where the plate contacts the throat. Don't get an excess amount of fluid down the throat you can hydrolock the engine (meaning don't pour it, etc). Take your time, it will take 30 minutes to do right. The back is the hardest part to clean. Don't use abrasive brushes (stainless or steel), you might get away with a brass brush, but don't scratch the throat. I took mine off and its easier but its still time consuming. Mike

Thanks Mike,

How do I expose the throttle body for cleaning?

I don't see any screws or bolts to remove the sensor.

in front of the T.B.

If you can, run me through the procedure to get at it.

Thanks again,

Bob

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Bob, if your's is the same as my 96, you take off the snorkle that goes from the air filter box to the throttle body, there will be a black collar there holding the MAF (I think its the MAF anyway). My black collar that holds the MAF has three screws holding it, take those screws out and take off the collar after disconnecting the electrical connectors... If I am wrong, and your 99 is different maybe someone can chime in here, I think Ranger has a 99 if I am not mistaken... Mike

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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My daughter had a '99 SLS but it has been replaced with my former '02. I cleaned the TB on it when she first got it and as well as I can recall the '99 is as BBF describes.

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Bob, if your's is the same as my 96, you take off the snorkle that goes from the air filter box to the throttle body, there will be a black collar there holding the MAF (I think its the MAF anyway). My black collar that holds the MAF has three screws holding it, take those screws out and take off the collar after disconnecting the electrical connectors... If I am wrong, and your 99 is different maybe someone can chime in here, I think Ranger has a 99 if I am not mistaken... Mike

Hi Mike,

This is exactly how I would do my '99, just as you described.

Now I'm trying to do my 2005, and I don't see any screws

to remove the Mass Airflow Sensor. I have not pulled anything

apart yet, but just looking at what I can see, I don't see the

three screws.

I don't want to get into it and find out I need a gasket or some

other part to finish it.

Thanks again,

Bob

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My daughter had a '99 SLS but it has been replaced with my former '02. I cleaned the TB on it when she first got it and as well as I can recall the '99 is as BBF describes.

Thanks Ranger

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Bob, if your's is the same as my 96, you take off the snorkle that goes from the air filter box to the throttle body, there will be a black collar there holding the MAF (I think its the MAF anyway). My black collar that holds the MAF has three screws holding it, take those screws out and take off the collar after disconnecting the electrical connectors... If I am wrong, and your 99 is different maybe someone can chime in here, I think Ranger has a 99 if I am not mistaken... Mike

Hi Mike,

This is exactly how I would do my '99, just as you described.

Now I'm trying to do my 2005, and I don't see any screws

to remove the Mass Airflow Sensor. I have not pulled anything

apart yet, but just looking at what I can see, I don't see the

three screws.

I don't want to get into it and find out I need a gasket or some

other part to finish it.

Thanks again,

Bob

Oh sorry Bob, I thought you were talking about your 99. Here is the procedure for the 2005, the numbers in the procedure refer to the attached photos. Mike

Document ID# 704608

2005 Cadillac DeVille

--------------------------------------------------------------------------------

Throttle Body Service

Removal Procedure

Disconnect the MAF sensor electrical connector.

Notice

Do not damage the MAF sensor screen. A damaged screen could restrict airflow and lead to a driveability concern.

Loosen the intake air duct clamps.

Remove the mass air flow (MAF) sensor and air cleaner intake duct (2) as an assembly.

Inspect the throttle body bore (1) and throttle valve plate for deposits. Open the throttle valve to inspect all surfaces.

Notice

Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.

Clean the throttle body bore and throttle valve plate using a clean shop towel with GM Top Engine Cleaner, P/N 1052626 Canada P/N 993026, or AC-Delco Carburetor Tune-Up Conditioner, P/N X66-P, or equivalent product.

Installation Procedure

Notice

The outlet of the air cleaner assembly and the MAF sensor inlet duct must line up when completely installed. Misalignment may cause incorrect airflow readings resulting in MIL illumination or a driveability concern. An improperly installed inlet duct assembly or air cleaner assembly may cause misalignment.

Notice

Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Install the MAF sensor and air cleaner intake duct (2) as an assembly.

Tighten the intake air duct clamps. Tighten

Tighten the intake air duct clamps to 3 N·m (27 lb in).

Connect the MAF sensor electrical connector to the MAF sensor.

post-2998-1185843481_thumb.jpg

post-2998-1185843491_thumb.jpg

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Here is more TB info for the 2005:

Throttle Body Assembly Replacement

Removal Procedure

Notice

Do not damage the MAF sensor screen. A damaged screen could restrict airflow and lead to a driveability concern.

05TB1.gif

Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure .

Remove the air cleaner intake duct.

Remove the PCV valve fresh air tube.

05TB2.gif

Remove the cruise control cable (2) from accelerator controls cable bracket (1).

Remove the accelerator cable (3) from accelerator controls cable bracket (1).

Remove the cruise control cable (2) from throttle body lever.

05TB3.gif

Remove the accelerator control cable (3) from throttle body lever (2).

05TB4.gif

Remove the IAC valve electrical connector (1) from the IAC valve (4).

Remove the TP sensor electrical connector (2) from the TP sensor (3).

05TB5.gif

Remove the fuel feed and return lines from the retainer (5) on the accelerator controls cable bracket.

05TB6.gif

Remove the transaxle shift cable (1) clip from the accelerator controls cable bracket.

05TB7.gif

Remove the throttle body (2) from the water crossover (1).

05TB8.gif

Remove the accelerator controls cable bracket (3) from the throttle body (1).

Installation Procedure

Notice

Do not use a cleaner which contains methyl ethyl ketone. This extremely strong solvent may damage components and is not necessary for this type of cleaning.

Use a carburetor cleaner in order to remove deposits.

Refer to the instructions provided with the cleaner.

Notice

The outlet of the air cleaner assembly and the MAF sensor inlet duct must line up when completely installed. Misalignment may cause incorrect airflow readings resulting in MIL illumination or a driveability concern. An improperly installed inlet duct assembly or air cleaner assembly may cause misalignment.

Important

Do Not Reuse the old throttle body gasket.

Notice

Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Install the accelerator cable bracket (3) to the throttle body (1). Tighten

Tighten the bolts to 12 N·m (106 lb in).

Position the new throttle body gasket on to the throttle body.

Install bolts from the throttle body (3) to throttle body spacer (1) and finger tighten 2 lower bolts. Tighten

Tighten all the bolts to 12 N·m (106 lb in).

Install the IAC valve electrical connector (1) to the IAC valve (4).

Install the TP sensor electrical connector (2) to the TP sensor (3).

Install the accelerator control cable (3) at throttle body lever (2).

Install the cruise control cable (2) at throttle body lever.

Install the accelerator cable (3) to the accelerator controls cable bracket (1).

Install the cruise control cable to accelerator controls cable bracket (1).

Install the transaxle shift cable (1) clip to the accelerator controls cable bracket.

Install the fuel feed and return lines from the retainer (5) on to the accelerator controls cable bracket.

Install the air cleaner intake duct clamp to the air cleaner intake air duct. Tighten

Tighten the air cleaner intake duct clamps to 3 N·m (27 lb in).

Install the PCV valve fresh air tube.

Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .

Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.

Perform the TP Sensor learn procedure.

Turn ignition switch to the RUN/ON position.

Wait 1 minute.

Turn ignition switch to the LOCK/OFF position.

Wait 15 seconds.

Perform the IAC Valve learn procedure:

Start and idle the engine for 15 seconds.

Turn the ignition switch to the LOCK/OFF position.

Wait 15 seconds

Restart the engine , and check for proper idle operation

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Share on other sites

Here is more TB info for the 2005:

Throttle Body Assembly Replacement

Removal Procedure

Notice

Do not damage the MAF sensor screen. A damaged screen could restrict airflow and lead to a driveability concern.

05TB1.gif

Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure .

Remove the air cleaner intake duct.

Remove the PCV valve fresh air tube.

05TB2.gif

Remove the cruise control cable (2) from accelerator controls cable bracket (1).

Remove the accelerator cable (3) from accelerator controls cable bracket (1).

Remove the cruise control cable (2) from throttle body lever.

05TB3.gif

Remove the accelerator control cable (3) from throttle body lever (2).

05TB4.gif

Remove the IAC valve electrical connector (1) from the IAC valve (4).

Remove the TP sensor electrical connector (2) from the TP sensor (3).

05TB5.gif

Remove the fuel feed and return lines from the retainer (5) on the accelerator controls cable bracket.

05TB6.gif

Remove the transaxle shift cable (1) clip from the accelerator controls cable bracket.

05TB7.gif

Remove the throttle body (2) from the water crossover (1).

05TB8.gif

Remove the accelerator controls cable bracket (3) from the throttle body (1).

Installation Procedure

Notice

Do not use a cleaner which contains methyl ethyl ketone. This extremely strong solvent may damage components and is not necessary for this type of cleaning.

Use a carburetor cleaner in order to remove deposits.

Refer to the instructions provided with the cleaner.

Notice

The outlet of the air cleaner assembly and the MAF sensor inlet duct must line up when completely installed. Misalignment may cause incorrect airflow readings resulting in MIL illumination or a driveability concern. An improperly installed inlet duct assembly or air cleaner assembly may cause misalignment.

Important

Do Not Reuse the old throttle body gasket.

Notice

Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Install the accelerator cable bracket (3) to the throttle body (1). Tighten

Tighten the bolts to 12 N·m (106 lb in).

Position the new throttle body gasket on to the throttle body.

Install bolts from the throttle body (3) to throttle body spacer (1) and finger tighten 2 lower bolts. Tighten

Tighten all the bolts to 12 N·m (106 lb in).

Install the IAC valve electrical connector (1) to the IAC valve (4).

Install the TP sensor electrical connector (2) to the TP sensor (3).

Install the accelerator control cable (3) at throttle body lever (2).

Install the cruise control cable (2) at throttle body lever.

Install the accelerator cable (3) to the accelerator controls cable bracket (1).

Install the cruise control cable to accelerator controls cable bracket (1).

Install the transaxle shift cable (1) clip to the accelerator controls cable bracket.

Install the fuel feed and return lines from the retainer (5) on to the accelerator controls cable bracket.

Install the air cleaner intake duct clamp to the air cleaner intake air duct. Tighten

Tighten the air cleaner intake duct clamps to 3 N·m (27 lb in).

Install the PCV valve fresh air tube.

Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .

Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.

Perform the TP Sensor learn procedure.

Turn ignition switch to the RUN/ON position.

Wait 1 minute.

Turn ignition switch to the LOCK/OFF position.

Wait 15 seconds.

Perform the IAC Valve learn procedure:

Start and idle the engine for 15 seconds.

Turn the ignition switch to the LOCK/OFF position.

Wait 15 seconds

Restart the engine , and check for proper idle operation

Thanks Mike,

That's a lot of great information.

I have pasted the text, and inserted the diagrams

into Excel.

It looks like if I don't remove the throttle body, then

I will not need any gaskets or sealants.

Thanks again,

Bob

.

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