Needing EGR Help

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  #1  
Old 06-04-11, 08:10 PM
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Needing EGR Help

Hi guys,

I have a few EGR valve questions. I am getting an insufficient flow code.

1998 Acura TL, V6 3.2

I have removed the EGR valve and cleaned twice. It seems to open just fine. The factory service manual offers no tips on troubleshooting.

1) Could this code be caused by the EGR control solenoid valve and/or the EGR vacuum solenoid valve or would these have their own code(s)?

2) What is the real chance that one of the vacuum hoses is clogged? Should I clean one by one?

At $230, I don't want to replace this goofy valve.
 
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  #2  
Old 06-05-11, 04:37 PM
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possible that the EGR 'passages' are plugged up with carbon.

try starting the engine - with the egr valve removed.
one passage should have exhaust gas/noise flowing freely.
the other passage should have vacuum / sucking noise freely.

the code is set by an exhaust gas pressure differential sensor - DPFE sensor.
possible that it is at fault

the egr solenoid 'could' be at fault-if it is not opening the valve.

i agree-do not just go buy a new valve until you have found the problem
 

Last edited by newtofta; 06-05-11 at 04:43 PM. Reason: info
  #3  
Old 06-05-11, 07:28 PM
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Thanks for the reply. I will try that. Is the DPFE sensor atop the EGR? I part-searched that for the 98 TL and nothing came up. Also not mentioned in the factory manual.
 
  #4  
Old 06-05-11, 07:53 PM
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i am a 'ford' guy, so i cant tell you specifics about the Acura/Honda.
but most all manufactures,in similar build dates (1998) etc have similar emissions control strategy's.
on a Ford the DPFE has 2 heat resistant /silicone rubber hoses (1/4"-or so) connecting it to the EGR/Exhaust system.
what it does is measure the pressure drop/differential when the EGR valve is commanded to open by the engine controller.
so if yours has something that performs this function.
i doubt it 'on' the valve / the valve may have sensor that tells the controller the valve is open or closed
 
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