PCV Valve Fouling my plugs and Bad Idle Quality - Page 6 - Chevelle Tech
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post #76 of 91 (permalink) Old Aug 24th, 16, 10:04 PM
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

Does it matter if I run both a breather and a PCV towards the front of the engine on opposite sides?[/QUOTE]

No

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post #77 of 91 (permalink) Old Aug 24th, 16, 10:07 PM
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

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Originally Posted by SHINER View Post
I ordered the fancy PCV valve and a catch can.
That's where we are headed with GDI cars.
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post #78 of 91 (permalink) Old Aug 24th, 16, 10:21 PM
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

Cant hurt. Can only help!

Good luck with the new part!

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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post #79 of 91 (permalink) Old Sep 2nd, 16, 10:40 PM Thread Starter
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

So got my ME Wagner installed and working right and a Moroso Catch Can Installed. Car seems to drive better with a PCV. However, trying to tune my radical roller cam with a vacuum gauge is next to impossible.

If I tune by the gauge I end up leaning it out so much it's hard to start the next day.

I chunked the vacuum gauge in the drawer as I'm just chasing my tail with it. I decided to start with the baseline 1.5 turns from seated and try to lean it out as best I could but not affect idle quality. I ended up 1 and 1/16 turn out with a 950 idle. Car seems to like it with a 12.0-12.4 idle AFR and the car sounds better all round. I think I'm gonna just call it done. My engine only makes about 7" of vacuum but I don't have any vacuum dependent equipment and it's enough to suck fuel at idle.
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post #80 of 91 (permalink) Old Sep 2nd, 16, 11:45 PM
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

What's your cam? 7" is kinda low.

Jim

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post #81 of 91 (permalink) Old Sep 2nd, 16, 11:47 PM Thread Starter
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

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what's your cam? 7" is kinda low.
@ 50

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post #82 of 91 (permalink) Old Sep 3rd, 16, 8:06 AM
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

How much timing do you have at idle?

Jim

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post #83 of 91 (permalink) Old Sep 3rd, 16, 9:25 AM Thread Starter
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

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How much timing do you have at idle?
34* locked out. My distributor is a billet e curve

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post #84 of 91 (permalink) Old Sep 3rd, 16, 10:15 AM Thread Starter
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

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34* locked out. My distributor is a billet e curve
Is too much idle at start up and cruising around town going to make it harder to start and sluggish? My SCR is 10.3 and DCR 8.11
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post #85 of 91 (permalink) Old Sep 4th, 16, 7:35 AM
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

If your starter has enough HP, it will crank fine. HP ratings ranger from about 1.2 to 3.4 HP for top of the line starters like the MSD Dyna Force. Some starter companies provide useless tq ratings instead of the rated HP of the starter to try & fool you.
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post #86 of 91 (permalink) Old Sep 4th, 16, 9:33 AM Thread Starter
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

I have a CVR Mini Starter. My question is should I have an advance curve? I drive this car 100% on the street for fun. I notice it has a miss all the time putting around down low. I'm currently locked out at 34* at all times

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post #87 of 91 (permalink) Old Sep 4th, 16, 2:11 PM
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

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I have a CVR Mini Starter. My question is should I have an advance curve? I drive this car 100% on the street for fun. I notice it has a miss all the time putting around down low. I'm currently locked out at 34* at all times
Seems to me a motor would run better on the street with a proper advance curve. All my experiments with forcing the advance in early only worked when I floored the car. Real bad cruising manners stop light to stop light on the street if all in by 2000rpm. Every motor is different though. Good luck

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post #88 of 91 (permalink) Old Sep 5th, 16, 10:34 PM
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

I would recommend a vacuum advance distributor for better drive-ability. Locked out distributors are great for strip only cars but suffer on the part throttle cruise. You can get it running and enjoy it for a while and upgrade later.

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post #89 of 91 (permalink) Old Sep 6th, 16, 6:16 AM
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Re: PCV Valve Fouling my plugs and Bad Idle Quality

Having additional cruise timing via vac adv would be a good idea.

However, current timing locked at 34* is adequate & would not be causing low speed misfire; most likely cause is leanness.

If you have a choke, try this: engine idling, close choke blade until engine note changes. Lock the choke blade in this position with some tie wire. Test drive car. If misfire is improved/gone, you are too lean on cruise.

Note: the fix is not increasing main jets/PV. The fix is to richen the idle cct because low speed cruise is on the idle cct via transfer slots.
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post #90 of 91 (permalink) Old Feb 7th, 17, 8:24 PM Thread Starter
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PCV Valve Fouling my plugs and Bad Idle Quality

Contact ME Wagner. mewagner.com. Get a real PCV valve and employ a catch can. That's what I now recommend ppl. Has helped me alot


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