 simple idle concern |
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| ericoneal |
 Sep 4 2012, 09:25 PM
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#1
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Member  Group: Members Posts: 320 Joined: 13-August 12 From: Crestwood, KY Member No.: 14,795 Region Association: South East States  |
I recently had a mechanic replace my pushrod tube seals and adjust the valves. Now the car seems a bit more difficult to start (it already was due to the PO MegaSquirt setting), and it idles rough as soon as I start it. It almost wants to die unless I give it some gas, but after I get up the street a bit, it seems to idle smoothly at about 1500 RPMS. The mechanic mentioned that my valves were way loose.
Do this problem sound like he may have overtightened them, the valves? He is a fairly popular aircooled guy here in town, but I dont know how many 914s he works on and I know the settings are a big different for the 2.0 than the other 914s. Any other factor that could affect my idle at startup? Thanks |
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| ConeDodger |
Sep 4 2012, 09:50 PM
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#2
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Apex killer! Group: Members Posts: 24,028 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California 
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Is this a stockish internal 2.0? The reason I ask is the valve adjustment for my 2432 is 0.
Hook it up and retune it? |
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| ericoneal |
Sep 4 2012, 09:55 PM
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#3
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Member Group: Members Posts: 320 Joined: 13-August 12 From: Crestwood, KY Member No.: 14,795 Region Association: South East States |
Sorry, you lost me. The mechanice adjusted my valves, I dont think he fewled with the megasquirt if that is what you are getting at.
Thanks QUOTE(ConeDodger @ Sep 4 2012, 11:50 PM)  Is this a stockish internal 2.0? The reason I ask is the valve adjustment for my 2432 is 0. Hook it up and retune it? |
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| Elliot Cannon |
Sep 4 2012, 10:09 PM
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#4
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914 Guru Group: Retired Members Posts: 8,487 Joined: 29-December 06 From: Paso Robles Ca. (Central coast) Member No.: 7,407 Region Association: None 
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QUOTE(ericoneal @ Sep 4 2012, 08:55 PM) Sorry, you lost me. The mechanice adjusted my valves, I dont think he fewled with the megasquirt if that is what you are getting at. Thanks QUOTE(ConeDodger @ Sep 4 2012, 11:50 PM) Is this a stockish internal 2.0? The reason I ask is the valve adjustment for my 2432 is 0. Hook it up and retune it? Zero lash is for steel push rods only Dude. Am I wrong? |
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| ConeDodger |
Sep 4 2012, 10:14 PM
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#5
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Apex killer! Group: Members Posts: 24,028 Joined: 31-December 04 From: Tahoe Area Member No.: 3,380 Region Association: Northern California
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QUOTE(Elliot Cannon @ Sep 4 2012, 08:09 PM) QUOTE(ericoneal @ Sep 4 2012, 08:55 PM) Sorry, you lost me. The mechanice adjusted my valves, I dont think he fewled with the megasquirt if that is what you are getting at. Thanks QUOTE(ConeDodger @ Sep 4 2012, 11:50 PM) Is this a stockish internal 2.0? The reason I ask is the valve adjustment for my 2432 is 0. Hook it up and retune it? Zero lash is for steel push rods only Dude. Am I wrong? I know... I'm trying to determine what 'kind' of 2 liter we are talking about... Also, if it's mega squirt why not tune it? |
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| ericoneal |
Sep 5 2012, 07:02 AM
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#6
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Member Group: Members Posts: 320 Joined: 13-August 12 From: Crestwood, KY Member No.: 14,795 Region Association: South East States |
Yes, it is a stock 2.0.
To clarify, I just had the pushrod tube seals replaces and now it idles very rough until warmed up and I am wondering if it is a valve issue. |
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| JamesM |
Sep 5 2012, 07:37 AM
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#7
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Advanced Member Group: Members Posts: 2,082 Joined: 6-April 06 From: Kearns, UT Member No.: 5,834 Region Association: Intermountain Region |
Do you have a wideband sensor on your MS setup? That might give a little insight as to what is going on. 2 things come to mind as possibilities.
1. Valves adjusted wrong. 2. Valves were wrong before adjustment and correct now, engine vacuum at idle has changed and megasquirt is now reading from a different MAP/RPM bin that is not set correctly. There are tons of other possibilities but those are the 2 that pop into mind related to the valves being adjusted. If the megasquirt setup was installed by a PO and you know nothing about it, get ready for a steep learning curve. Are you fuel only or fuel and spark? |
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| 76-914 |
Sep 5 2012, 09:28 PM
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#8
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,700 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
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What is "fewled"?
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| TheCabinetmaker |
Sep 6 2012, 02:53 PM
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#9
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I drive my car everyday Group: Members Posts: 8,336 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
I agree with James. Valves were wrong before or wrong now, and the ms needs to re tuned.
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| ericoneal |
Sep 6 2012, 04:03 PM
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#10
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Member Group: Members Posts: 320 Joined: 13-August 12 From: Crestwood, KY Member No.: 14,795 Region Association: South East States |
QUOTE(The Cabinetmaker @ Sep 6 2012, 04:53 PM) I agree with James. Valves were wrong before or wrong now, and the ms needs to re tuned. Thanks, I talked to the mechanic again and he seemed to feel the same way. I should be be meeting with the previous owner soon and am going to see if he will give me a crash course in MegaSquirt. He did give me all the previous tuning tables on a USB stick. |
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