Silverado engine swap now want start

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Justinwells14
Posts: 1
Joined: Wed Jun 25, 2014 10:16 pm

Silverado engine swap now want start

Unread post by Justinwells14 » Wed Jun 25, 2014 10:20 pm

I have a 2001 silverado had a 4.8 changed the 4.8 to a 5.3 also used the 5.3 harness and ecu, want start; turns over fire it's like it fires off and dies, any help would be awesome.


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carriedi
Posts: 2266
Joined: Wed Apr 10, 2013 12:42 pm
Location: Oregon

Re: Silverado engine swap now want start

Unread post by carriedi » Thu Jun 26, 2014 6:55 am

you didn't need to change the pcm and harness.

your going to need to go to the basics. check fuel pressure, injector pulse and spark. Is your passlock working correctly? if your truck uses anti-theft you will might need to do a relearn.
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