Valve Chatter
Thread Starter
Joined: Sep 2002
Posts: 797
Likes: 3
From: Keyser, West Virginia
Valve Chatter I just recently finished my SuperCharger install and had it out for the first time last night. I done everything by the book, had my Computer reflashed for my setup everything. And when a put a load on it, I have valve chatter. Could it be the gas I'm running. (93 octane). Any Help Would Be Greatly Appreciated.
Thanks, Have A Great Weekend and God Bless Our Troops and the U.S.,
John Junkins
Thanks, Have A Great Weekend and God Bless Our Troops and the U.S.,
John Junkins
Last edited by John Junkins; Jun 1, 2008 at 11:19 AM.
That.. I just recently finished my SuperCharger install and had it out for the first time last night. I done everything by the book, had my Computer reflashed for my setup everything. And when a put a load on it, I have valve chatter. Could it be the gas I'm running. (93 octaine). Any Help Would Be Greatly Appreciated.
Thanks, Have A Great Weekend and God Bless Our Troops and the U.S.,
John Junkins
Thanks, Have A Great Weekend and God Bless Our Troops and the U.S.,
John Junkins
I'd strongly suggest you stay off the pedal, until it's diagnosed. Rattling the engine so much, you think it's the valves, WILL lead to destruction.
LOTS of items to check:
1. Fuel pressure? Idle and at boost.
2. What do the plugs look like?
3. How much boost are you running?
4. Timing?
5. Inj sized to FWHP?
These are just a start in finding what's going on. I'm sure others will chime in..
Thread Starter
Joined: Sep 2002
Posts: 797
Likes: 3
From: Keyser, West Virginia
1. Fuel pressure? Idle and at boost. (Walbro 255 fuel pump)(60+ psi)
2. What do the plugs look like? (I haven't pulled them yet)
3. How much boost are you running?(6psi)
4. Timing? (I sent it back to PCMforless Bryan Heter to reflash)
5. Inj sized to FWHP? (Ford Green tops 42lbs)
Also running Katech heads 2.02 int. 1.57 exh. shaved .030
228R cam 228 228 .588 .588 110+2 LSA
Aluminum intake Weiand
NGK TR6 plugs gaped at .040 according to Bryan.
stock displacement forged bottom end
ZEX nitrous kit with a 100 shot. with delay box..
Any help would be greatly appreciated and I wasn't at full throttle just any load going up a small grade and I just filled the tank with 93oct. gas from Citgo.
2. What do the plugs look like? (I haven't pulled them yet)
3. How much boost are you running?(6psi)
4. Timing? (I sent it back to PCMforless Bryan Heter to reflash)
5. Inj sized to FWHP? (Ford Green tops 42lbs)
Also running Katech heads 2.02 int. 1.57 exh. shaved .030
228R cam 228 228 .588 .588 110+2 LSA
Aluminum intake Weiand
NGK TR6 plugs gaped at .040 according to Bryan.
stock displacement forged bottom end
ZEX nitrous kit with a 100 shot. with delay box..
Any help would be greatly appreciated and I wasn't at full throttle just any load going up a small grade and I just filled the tank with 93oct. gas from Citgo.
Last edited by John Junkins; May 31, 2008 at 11:58 AM.
Well i know you dont want to hear this but you really need to get a tune on a dyno with a professional. There is no way i would trust mixing n20 and boost with an emailed tune.
Thread Starter
Joined: Sep 2002
Posts: 797
Likes: 3
From: Keyser, West Virginia
I haven't used the nitrous yet,but Bryan said I could. And I would love to find a tuner sort of close and get it tuned the right way. Don't get me wrong Bryan does a great job. Just want to fine tune it.
Thanks Again,
John Junkins
Thanks Again,
John Junkins
Thread Starter
Joined: Sep 2002
Posts: 797
Likes: 3
From: Keyser, West Virginia
Spoke with PCM Bryan Heter, He going to put some timing out of it. That's why I like dealing with them. And we can go from there. Thanks for the help it's greatly appreciated.
John Junkins
John Junkins
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You certainly should not be hearing knock, especially if you're not even going wide open throttle. You may of gotten a bad tank of gas at that Citgo station. I'd drain the gas and get a tank of gas at a different station. Bob
Thread Starter
Joined: Sep 2002
Posts: 797
Likes: 3
From: Keyser, West Virginia
You certainly should not be hearing knock, especially if you're not even going wide open throttle. You may of gotten a bad tank of gas at that Citgo station. I'd drain the gas and get a tank of gas at a different station. Bob
Bob, THANKS!!! Someone else told me the samething. I was thinking of trying octane booster to bring it up a little. And the way gas is right now I don't know if there was 93 octane in the 93 pump. at 4.10 a gallon it better be.
P>S> Bob I will be in contact with you very shortly.
Thanks Again for your help and have a great Sunday,
John Junkins
Bob, THANKS!!! Someone else told me the samething. I was thinking of trying octane booster to bring it up a little. And the way gas is right now I don't know if there was 93 octane in the 93 pump. at 4.10 a gallon it better be.
P>S> Bob I will be in contact with you very shortly.
Thanks Again for your help and have a great Sunday,
John Junkins
Last edited by John Junkins; Jun 1, 2008 at 11:18 AM.
Thread Starter
Joined: Sep 2002
Posts: 797
Likes: 3
From: Keyser, West Virginia
if its preignition, timing and/or fuel wont stop it...only octane.
Ya, I'm going to go to Advance Auto or Auto Zone and get the best Octane booster and see what it does. Thanks For the Info. it's greatly appreciated.
Thanks Again, have a great Sunday And God Bless Our Troops and the U.S.,
John Junkins
Ya, I'm going to go to Advance Auto or Auto Zone and get the best Octane booster and see what it does. Thanks For the Info. it's greatly appreciated.
Thanks Again, have a great Sunday And God Bless Our Troops and the U.S.,
John Junkins
Octane boost won't do much for you, it will raise it from 93 to 93.3-93.5, thats about it. Mix some race fuel in there to get the octane up. Or drain the tank and start over with some 100 oct unleaded and try again.
