2001 Dakota r/t im looking at
#1
11-15-2012, 01:22 PM
Join Date: Oct 2007
Location: Illinois
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2001 Dakota r/t im looking at
Found an r/t, has cai, hughes intake manifold, larger throttle body, rockers, mild cam, aftermarket fuel rail and injectors. 69,000 miles on it. Drove it today, smooth riding and driving, shifts great and moves pretty good. Only thing is that when i come down to an idle in drive, it putts then dies.... needs a stall im assuming? cause i know one ain't installed. Cost on something like that? Does it need something else? Premium fuel? Had full exhaust..... Anyone know of a tuning place in Illinois? Preferably northern Illinois. Need some help! Thanks guys.
#2
11-16-2012, 06:49 AM
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Location: upstate NY
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Idle Air Control (IAC) Valve
The IAC regulates the amount of air that is introduced into the TB and intake, so it is essential for a smooth idle. The IAC plunger moves in and out of the IAC orifice on the TB in relation to engine speed and RPM, based on what the PCM tells the IAC to do. When the IAC gets gunked up with soot and carbon, it cannot work as well so that is why a dirty IAC can cause a stumble or roughidle.
The IAC is located on the back side of the throttle body, facing the firewall. It is best to disconnect the throttle cable, cruise control cable and TV cable if you have those. Then unplug and remove the IAC, Manifold Absolute Pressure (MAP) sensor and the Throttle Position Sensor (TPS) from the TB. Then you can remove the TB and thoroughly clean it. I use TB cleaner and a tooth brush and a shop rag. Clean both sides the butterfly plates and the bores, and the rest of the TB. When you clean the IAC use a shop rag soaked in TB cleaner, you need to clean the black crusty crud off the pintle end of it. Do not drop the IAC or handle it roughly or you will need a new one. Spray the TB cleaner down into the bore of the IAC piston and work it back and forth by hand so the piston will move easier. Pull the IAC piston back into its approximate original position and lube the O-ring with a little clean motor oil before re-installing the IAC. Also clean the inside of the IAC orifice with TB cleaner, get as much of the black crud out of there as possible, use Q-tips if needed. Then lube all of the pivot points and linkages on the TB with spray silicone and re-install the TB using a new TB gasket. A new TB gasket costs about $2.00 at most any parts store.
You should have a much better idle and a smoother running truck after cleaning the TB and IAC.
The IAC regulates the amount of air that is introduced into the TB and intake, so it is essential for a smooth idle. The IAC plunger moves in and out of the IAC orifice on the TB in relation to engine speed and RPM, based on what the PCM tells the IAC to do. When the IAC gets gunked up with soot and carbon, it cannot work as well so that is why a dirty IAC can cause a stumble or roughidle.
The IAC is located on the back side of the throttle body, facing the firewall. It is best to disconnect the throttle cable, cruise control cable and TV cable if you have those. Then unplug and remove the IAC, Manifold Absolute Pressure (MAP) sensor and the Throttle Position Sensor (TPS) from the TB. Then you can remove the TB and thoroughly clean it. I use TB cleaner and a tooth brush and a shop rag. Clean both sides the butterfly plates and the bores, and the rest of the TB. When you clean the IAC use a shop rag soaked in TB cleaner, you need to clean the black crusty crud off the pintle end of it. Do not drop the IAC or handle it roughly or you will need a new one. Spray the TB cleaner down into the bore of the IAC piston and work it back and forth by hand so the piston will move easier. Pull the IAC piston back into its approximate original position and lube the O-ring with a little clean motor oil before re-installing the IAC. Also clean the inside of the IAC orifice with TB cleaner, get as much of the black crud out of there as possible, use Q-tips if needed. Then lube all of the pivot points and linkages on the TB with spray silicone and re-install the TB using a new TB gasket. A new TB gasket costs about $2.00 at most any parts store.
You should have a much better idle and a smoother running truck after cleaning the TB and IAC.