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08-12-2016, 02:29 PM
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#1 |
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Registered User
Join Date: Sep 2012
Location: Neeses SC
Posts: 66
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trying to post this on LS Swap page
Tried to post on lsx swap page but I can't find a "New Thread" button anywhere. But I having a problem with 2003 5.3 motor that I'm swapping into 85 k10. I'm trying to start the motor and let it run for a minute before installing it into the truck. I sent the PCM to brendan at lt1swap to flash it. Once I got it back I plugged in the wire harness and wired up the starter and PCM. And made sure all the ground wire are grounded. The engine will fire up for a split second then shut off. Anybody have idea what this might be or how to post on the lsx swap page. Thanks
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08-12-2016, 02:42 PM
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#2 |
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Registered User
Join Date: Dec 2013
Location: So Cal
Posts: 680
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Re: trying to post this on LS Swap page
Make sure the key wire has power after it starts....if not hook up a ground to the engine straight to the battery,I had that problem it was my ground
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08-12-2016, 02:54 PM
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#3 |
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Senior Member
 Join Date: Mar 2003
Location: Colfax-California
Posts: 8,407
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Re: trying to post this on LS Swap page
Fuel pressure? power to the pump after starting?
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08-12-2016, 04:14 PM
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#4 |
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Post Whore
 
Join Date: May 2015
Location: Alabama
Posts: 14,601
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Re: trying to post this on LS Swap page
All good points...they told me to ground mine every which way from sunday..battery to engine..engine to frame..frame to body..every combination you can think of..for my constant switch on power I used the big wire that went to the hei..you need a key on power and a constant power..fuel pump also..I'm assuming you already know all that.. does it die when you let off of the key or does it still run for a few seconds...do you have the maf installed in the intake tube..leave that out of the tube and it'll do exactly what your describing...if all this is done I would put a eye on fuel pressure and see what ya got.
Last edited by mongocanfly; 08-12-2016 at 04:21 PM. |
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08-12-2016, 04:18 PM
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#5 |
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Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,601
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Re: trying to post this on LS Swap page
I just looked and the LS swap new thread button is still there on mine..if you don't have it you may need to reboot or something..
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08-13-2016, 12:10 AM
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#6 |
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Registered User
Join Date: Sep 2012
Location: Neeses SC
Posts: 66
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Re: trying to post this on LS Swap page
Thanks yall. Right now I don't have it in the truck I'm trying to run it a little bit before putting it in the truck. Just trying to get it running good before putting it in the truck.
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08-13-2016, 11:50 AM
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#7 |
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Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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Re: trying to post this on LS Swap page
I will move it for you. Not sure why you cant post there but I will put it there for you.
__________________
Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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08-14-2016, 08:52 PM
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#8 | |
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Senior Member
Join Date: Oct 2001
Location: Lancaster S.C.
Posts: 4,745
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Re: trying to post this on LS Swap page
Quote:
__________________
Things happen for a reason! |
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08-14-2016, 09:01 PM
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#9 |
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Registered User
Join Date: Sep 2015
Location: Savannah GA
Posts: 51
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Re: trying to post this on LS Swap page
Check fuel press. first. Then start it with a test light in the injector plug and a timing light....divide and conquer, possibly a problem with the reflash imo.
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