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It is currently Thu May 23, 2013 6:28 pm
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matts13
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Wed Apr 07, 2010 11:17 pm |
| OK Finally Past the Hazing |
Joined: Mon Jan 09, 2006 8:31 pm Posts: 1913 Location: marietta
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headers glowing read means timming is crazy out or low fuel psi/injector timing.
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foilman
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Thu Apr 08, 2010 9:06 am |
| Not Really Past the Hazing |
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Joined: Thu Feb 09, 2006 11:52 pm Posts: 1403
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Since the head was just replaced, it could even be the cam timing, but start with ignition timing. Did it ever run correctly after reassembly?
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Yoshi
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Thu Apr 08, 2010 9:19 am |
| Imitation Crab Meat |
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Joined: Wed Jun 25, 2008 3:18 pm Posts: 585 Location: Cookeville, TN
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No it never ran correctly so I re-did the cams multiple times. I had done them before because I put the previous motor together and my friends motors together. When it ran weird, probably due to the bad knock sensor plug, I started experimenting with cam positions. I have the hot cam swap so they don't match up with the timing marks.
I normally set the cam lobes facing away from each other on #1 cylinder at TDC so they are pretty much like this <o o> I had looked around online and wound up turning the intake cam a tooth or two clockwise so it raised the lobe a bit.
I tried setting the timing last night with distributor and I unplugged the tps and set the timing to 20 degrees btdc, which is the factory setting, and when I did the idle was around 3,000 3,500 rpms. When I plugged the tps back in it dropped and went WAY Retarded and wouldn't rev up well at all.
I'm going back in between classes and am going to set the cams back to what worked for me in the past and other motors I have put together.
Thanks again for your help guys, I really appreciate it.
_________________ -bump steer makes driving more exciting- (>_<) ヨシ ドリ Garage Tune LLC - Will try to match or beat ANY PRICE they can

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foilman
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Thu Apr 08, 2010 9:28 am |
| Not Really Past the Hazing |
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Joined: Thu Feb 09, 2006 11:52 pm Posts: 1403
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Idle at 3k means you probably have a vacuum leak too. Don't use propane, use starting fluid.
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foilman
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Thu Apr 08, 2010 10:25 am |
| Not Really Past the Hazing |
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Joined: Thu Feb 09, 2006 11:52 pm Posts: 1403
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That sounds exactly like a stuck open... erm.. forget the name... not the idle air control valve on the back of the plenum, but the one curled up in the runners. It's essentially causing a vacuum leak but you won't find it by injecting gas. There is a FAT vacuum line that feeds the two valves, disconnect it and the TPS and the car will idle really high. Plug it with your thumb and see if it drops/stalls. If it does, one of those two vavles is bad/not sealed to the plenum/ has bad wires. It's probably that  you can't get to... it happend to me with my last rebuild and had me stumped for DAYS, and you can't get to that guy with the manifold on, but you can play some funny tricks to block it off and still supply the IACV if you have a long hose.
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Yoshi
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Thu Apr 08, 2010 7:10 pm |
| Imitation Crab Meat |
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Joined: Wed Jun 25, 2008 3:18 pm Posts: 585 Location: Cookeville, TN
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Okay so here are my cam positions. At tdc on the compression stroke for #1.  Intake:  Exhaust:  Yes the oil will be changed once it's running correctly. And this is how I have set the cams every other time I have done them with no issue. Reason I changed it was because of the issues I had and looking at pictures online of other peoples stuff.  Any how, any ideas? *edit* here is a picture of the header turning red 
_________________ -bump steer makes driving more exciting- (>_<) ヨシ ドリ Garage Tune LLC - Will try to match or beat ANY PRICE they can

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foilman
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Post subject: Re: 4000 rpms... no more... less is okay... Posted: Thu Apr 08, 2010 9:27 pm |
| Not Really Past the Hazing |
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Joined: Thu Feb 09, 2006 11:52 pm Posts: 1403
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That's a tiny pic, but I'm pretty sure it's 9, the "IACV - air regulator". To repeat.. it's the guy wound up in the runners. If it's the culprit you can .. screw this I pm'd you my number earlier, use it.
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