 73 2.0 Decel valve, Do you really need one |
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| koozy |
 Aug 24 2007, 09:34 AM
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#1
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Senior Member  Group: Members Posts: 648 Joined: 21-July 07 Member No.: 7,931 Region Association: None  |
I got a 73 with a 2.0 that didn't have a deceleration valve. I'm tuning it now and wonder if it is critical to have one. Can anyone shed some light on this?
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| swl |
Aug 24 2007, 09:41 AM
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#2
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Senior Member Group: Members Posts: 1,409 Joined: 7-August 05 From: Kingston,On,Canada Member No.: 4,550 Region Association: Canada |
I'll let the experts give the definitive answer but my understanding is that it is a polution control thing. My old 73 1.7 did not have one installed and it ran just fine.
Unless of course the deceleration valve has something to do with slowing down rust. If that is the case then I can blame my rust on not having one. |
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| JeffBowlsby |
Aug 24 2007, 10:19 AM
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#3
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914 Wiring Harnesses Group: Members Posts: 8,492 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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It was recently found that removing the decel valve puts more stress on the MPS...I would leave it in for around town driving...
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| koozy |
Aug 24 2007, 10:20 AM
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#4
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Senior Member Group: Members Posts: 648 Joined: 21-July 07 Member No.: 7,931 Region Association: None |
Ah, yes.... I found this at
http://www.rennlist.com/techarticles/djetronicfuel.htm Deceleration Mixture Control Valve Located at the pressure sensor bracket, this valve leans out the mixture when the throttle is closed. This is purely an emissions control device. If it is removed and its associated air lines plugged, no performance change will result. However, this may cause you to fail smog certification in some states. A leaking decel valve will cause a high idle condition (test by pinching off the air lines). |
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| por73914 |
Aug 24 2007, 10:30 AM
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#5
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I don't know what the hell I am doing... Group: Members Posts: 349 Joined: 10-April 07 From: Fayetteville, AR Member No.: 7,660 |
QUOTE(koozy @ Aug 24 2007, 11:20 AM)  Ah, yes.... I found this at http://www.rennlist.com/techarticles/djetronicfuel.htm Deceleration Mixture Control Valve Located at the pressure sensor bracket, this valve leans out the mixture when the throttle is closed. This is purely an emissions control device. If it is removed and its associated air lines plugged, no performance change will result. However, this may cause you to fail smog certification in some states. A leaking decel valve will cause a high idle condition (test by pinching off the air lines). When I unhook mine the car smells REALY rich at idle! (IMG:style_emoticons/default/shades.gif) |
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| koozy |
Aug 24 2007, 10:43 AM
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#6
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Senior Member Group: Members Posts: 648 Joined: 21-July 07 Member No.: 7,931 Region Association: None |
Hmmmmm..... I think I'll get one. I better not put any undue stress on that hard to find MPS.
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| koozy |
Aug 24 2007, 10:50 AM
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#7
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Senior Member Group: Members Posts: 648 Joined: 21-July 07 Member No.: 7,931 Region Association: None |
Thanx....... Now to just find one...
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| blitZ |
Aug 24 2007, 10:55 AM
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#8
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Beer please... Group: Members Posts: 2,223 Joined: 31-August 05 From: Lawrenceville, GA Member No.: 4,719 Region Association: South East States |
I removed mine, car runs the same. Cleans up the engine bay, less opportunity for vacuum leaks.
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| koozy |
Aug 24 2007, 11:01 AM
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#9
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Senior Member Group: Members Posts: 648 Joined: 21-July 07 Member No.: 7,931 Region Association: None |
Are they different for the size motor or are they all the same part number?
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| por73914 |
Aug 24 2007, 11:13 AM
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#10
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I don't know what the hell I am doing... Group: Members Posts: 349 Joined: 10-April 07 From: Fayetteville, AR Member No.: 7,660 |
QUOTE(koozy @ Aug 24 2007, 12:01 PM) Are they different for the size motor or are they all the same part number? I have one out of my 74 2.0 (IMG:style_emoticons/default/beerchug.gif) |
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| koozy |
Aug 24 2007, 11:16 AM
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#11
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Senior Member Group: Members Posts: 648 Joined: 21-July 07 Member No.: 7,931 Region Association: None |
How much do you want for it?
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| por73914 |
Aug 24 2007, 11:22 AM
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#12
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I don't know what the hell I am doing... Group: Members Posts: 349 Joined: 10-April 07 From: Fayetteville, AR Member No.: 7,660 |
QUOTE(koozy @ Aug 24 2007, 12:16 PM) How much do you want for it? PM Sent. (IMG:style_emoticons/default/driving.gif) |
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| addwestern |
Aug 24 2007, 03:14 PM
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#13
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NorCal Parts guy Group: Members Posts: 314 Joined: 21-June 06 From: Sacramento Member No.: 6,276 |
Drove all of my car without them. It was my understanding that the Euro Spec cars never had them stock.
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