5.3 into a 66 c10 - engine does not start - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mlevario99 · 11-24-2012, 09:42 PM

I am trying to start a 5.3 engine that I isntalled in a 66 truck. I have not reprogramed the computer but I do have HP Tuners to do that. Well just now I try it and it crank but it does not start, like there is no spark. The fuel pressure is fine , I tested with a gauge. I remove the spark plug wire and put the tip of a screwdriver and crank it and there is no spark from the screw driver. Do you guy have any ideas what could it be. I check the grounds and I think I have them all. I check the pink wires and they have power.

Any ideas.

Thanks

71chevystep4x4 · 11-24-2012, 09:50 PM

I would immagine that it is because you have not reprogramed the computer yet. I was under the impression that they will not start until the VATS have been dissabled.

mlevario99 · 11-24-2012, 09:53 PM

Thanks 71chevystep, from what I have read before, the engine is supposed to start for a few seconds and then it dies, but I could be wrong, I guess I need to disactivate the VATS and try it again, and see what happens

mlevario99 · 11-24-2012, 11:03 PM

When I was working on the harness I had to replace the crank position sensor plug, I bought it at the GM dealer, but the wires the fron the plug were all white, now I am wondering if they have a particular order they need to go

*bk2life* · 11-25-2012, 01:06 AM

Quote:

Originally Posted by mlevario99

the engine is supposed to start for a few seconds and then it dies,

not a few seconds, about one tenth of a second.

BR3W CITY · 11-25-2012, 03:08 AM

unless all of your coils are also dead, its probably VATS as mentioned...

mlevario99 · 11-25-2012, 11:12 AM

I check one set of coils in another engine and they do work. I dissable the VATS last night. What else could it be, can the crankshaft position sensor plug be wired incorrectly. Any ideas

Thanks

mlevario99 · 11-25-2012, 05:31 PM

Well I wired the crankshaft position sensor wrong, I rewired and it work for a while...
I bought a module from current performance wiring with all the wires
And relays for the harness, and it was working fine but then
Something happen and is not workin anymore, the relay that opens the
Power for the other fuses is not working, I have power but it
Just doesn't open the circuit.. Also the starter relay when you
Crank the switch and I use a test light the light turn on green
Instead of red, any ideas
Posted via Mobile Device

11-24-2012, 09:42 PM	#1
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	5.3 into a 66 c10 - engine does not start I am trying to start a 5.3 engine that I isntalled in a 66 truck. I have not reprogramed the computer but I do have HP Tuners to do that. Well just now I try it and it crank but it does not start, like there is no spark. The fuel pressure is fine , I tested with a gauge. I remove the spark plug wire and put the tip of a screwdriver and crank it and there is no spark from the screw driver. Do you guy have any ideas what could it be. I check the grounds and I think I have them all. I check the pink wires and they have power. Any ideas. Thanks

11-24-2012, 09:50 PM	#2
71chevystep4x4 Registered User Join Date: Sep 2012 Location: Milwaukie OR Posts: 135	Re: 5.3 into a 66 c10 - engine does not start I would immagine that it is because you have not reprogramed the computer yet. I was under the impression that they will not start until the VATS have been dissabled.

11-24-2012, 09:53 PM	#3
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	Re: 5.3 into a 66 c10 - engine does not start Thanks 71chevystep, from what I have read before, the engine is supposed to start for a few seconds and then it dies, but I could be wrong, I guess I need to disactivate the VATS and try it again, and see what happens

11-24-2012, 11:03 PM	#4
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	Re: 5.3 into a 66 c10 - engine does not start When I was working on the harness I had to replace the crank position sensor plug, I bought it at the GM dealer, but the wires the fron the plug were all white, now I am wondering if they have a particular order they need to go

11-25-2012, 03:08 AM	#6
BR3W CITY meowMEOWmeowMEOW Join Date: Sep 2009 Location: MKE WI Posts: 7,128	Re: 5.3 into a 66 c10 - engine does not start unless all of your coils are also dead, its probably VATS as mentioned... __________________ *'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING* MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD

11-25-2012, 11:12 AM	#7
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	Re: 5.3 into a 66 c10 - engine does not start I check one set of coils in another engine and they do work. I dissable the VATS last night. What else could it be, can the crankshaft position sensor plug be wired incorrectly. Any ideas Thanks

11-25-2012, 05:31 PM	#8
mlevario99 Registered User Join Date: Apr 2010 Location: El Paso, TX Posts: 160	Re: 5.3 into a 66 c10 - engine does not start Well I wired the crankshaft position sensor wrong, I rewired and it work for a while... I bought a module from current performance wiring with all the wires And relays for the harness, and it was working fine but then Something happen and is not workin anymore, the relay that opens the Power for the other fuses is not working, I have power but it Just doesn't open the circuit.. Also the starter relay when you Crank the switch and I use a test light the light turn on green Instead of red, any ideas Posted via Mobile Device

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