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P1491, Where is my egr valve?

 
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Old 09-06-2011, 11:24 PM
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P1491, Where is my egr valve?

i recently bought a 98 prelude sh and the motor had some work done on it, such as a skunk2 intake manifold and other bolt ons, i'm throwing the p1491 code so i was going to clean my egr vlve but cant find it. i was wondering if the intake manifold moved the egr valve or if it could have cut it out all together because i cant find any connectors or hoses from it. if anyone could help me out it would be great
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Old 09-06-2011, 11:39 PM
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Re: P1491, Where is my egr valve?

skunk 2 intake manifold does not have an egr valve. Which is why you're throwing the code.

Normally it's located between the throttle body and the head (next to the fuel rail) on the stock intake manifold.

Last edited by wing8806; 09-06-2011 at 11:41 PM.
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Old 09-07-2011, 12:27 AM
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Re: P1491, Where is my egr valve?

^ agreed
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Old 09-07-2011, 12:44 PM
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Re: P1491, Where is my egr valve?

On a 98 lude egr is located on the bottom of the block next to the tranny with a long vacuum line leading to it.
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Old 09-07-2011, 01:23 PM
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Re: P1491, Where is my egr valve?

Quote:
Originally Posted by abelsgotspeed View Post
On a 98 lude egr is located on the bottom of the block next to the tranny with a long vacuum line leading to it.


Do explain further... because the egr valve is on the top of the intake manifold for all H22's, however the solenoid can be placed anywhere. Why would something that has to do with fuel be lower on the motor when the contaminations are picked up within the ports on the top of the intake manifold?
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Old 09-07-2011, 02:20 PM
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Re: P1491, Where is my egr valve?

Quote:
Originally Posted by abelsgotspeed View Post
On a 98 lude egr is located on the bottom of the block next to the tranny with a long vacuum line leading to it.


Wha kinda EGR do you have sir?!?!

It's normally located behind the top left of the motor close by the fuel rail!!! It looks like a little domed space shuttle!!!
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Old 09-07-2011, 04:06 PM
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Re: P1491, Where is my egr valve?

It was a joke lol I was being sarcastic lol
Sorry!!
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Old 09-07-2011, 04:27 PM
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Re: P1491, Where is my egr valve?

thanks for the help, my car also has pretty bad acceleration and you cant really feel the v-tec kick in, i thought this was cause of the egr valve, but im also throwing a knock sensor code could that be why it has bad acceleration?
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Old 09-07-2011, 04:41 PM
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Re: P1491, Where is my egr valve?

Are you bogging out randomly?
Mostly common when egr is deleted
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Old 09-07-2011, 06:21 PM
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Re: P1491, Where is my egr valve?

It could be a number of things - what are the CELs you're throwing?

check spark plugs as well

Last edited by wing8806; 09-08-2011 at 07:04 PM.
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Old 09-08-2011, 04:16 PM
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Re: P1491, Where is my egr valve?

im throwing the p1491 and p0325 codes,it only bogs down when i put it to the floor, i also have a bad idle the goes between 1100 and 2000, ive changed the pcv valve but not spark plugs or cleaned the egr ports yet
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Old 09-08-2011, 06:59 PM
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Re: P1491, Where is my egr valve?

*facepalm* i keep forgetting you have a skunk2 intake manifold - you don't have the egr ports so dont worry about it. thats the reason your throwing the egr code, no egr at all.


you can still check your plugs... but either go back to stock or switch to OBD1 if you can in your state to resolve your CEL issues

Check your o2 sensors, clean your vtec solenoid screen too.

Last edited by wing8806; 09-08-2011 at 07:03 PM.
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Old 09-08-2011, 08:14 PM
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Re: P1491, Where is my egr valve?

thanks for all the help, tonight i went to change my spark plugs and i found oil all over them... i heard there was gromets on the head to keep oil from getting in and they can go bad, however i also heard that honda stopped making heads like that in 1996, any ideas?
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Old 09-08-2011, 09:42 PM
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Re: P1491, Where is my egr valve?

it's number 4 in this link. the seals are under the valve cover
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Old 09-10-2011, 01:32 AM
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Re: P1491, Where is my egr valve?

thanks so much for all your help, hopefully my baby will be running smooth after tomarow
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