lq4 swap ran but now no spark/start issue - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**cdub2010** · 05-20-2018, 03:35 PM

My 5.3 swap went fine, I have had it running and driving in the driveway. Did a little paint work on the rear frame and pulled it back in the shop. It stopped running, now it has a no start issue. No check engine light at start like it used to, it cranks but has no spark. I have fuel at the rail and sprayed starting fluid in the manifold still no start. Pulled plug confirmed no spark. Brand new PSI harness and computer were used. 12+ volts at the battery, drops to 10.5 voltage when cranking. Where else to look?

05-20-2018, 03:35 PM	#1
cdub2010 Senior Member Join Date: Apr 2014 Location: detroit mi Posts: 209	5.3 swap ran but now no spark/start issue My 5.3 swap went fine, I have had it running and driving in the driveway. Did a little paint work on the rear frame and pulled it back in the shop. It stopped running, now it has a no start issue. No check engine light at start like it used to, it cranks but has no spark. I have fuel at the rail and sprayed starting fluid in the manifold still no start. Pulled plug confirmed no spark. Brand new PSI harness and computer were used. 12+ volts at the battery, drops to 10.5 voltage when cranking. Where else to look? Last edited by cdub2010; 05-20-2018 at 05:21 PM.

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