Need help asap, DD
Need help asap, DD Details on truck: 06 gmc Sierra 1500 Denali. Tuned, headers, CAI that's it.
Long story short, I did the big 3 upgrade last night and now have no spark when trying to fire. All my connection are clean and tight I double checked. I have checked ALL fuses and they are good. Now here's the kicker, it will randomly have spark for about a second and try to fire then nothing it just stops sparking. It's getting fuel, I can smell it. Haven't been able to check my fuel pressure but it was fine before. Any help it's my DD and I go to worm tonight.
I have checked the crank sensor and changed it to be sure. The power wire is getting 12 volts and the ground is good. Now the signal wire I read you manually turn the crank and it should read 10volts but I'm only getting .03 or so. Even when you use the starter (says not to) still only 4 volts.
How I have the big 3:
+ Alternator to battery
- battery to frame
- battery to block
- battery to core support (factory one still)
Long story short, I did the big 3 upgrade last night and now have no spark when trying to fire. All my connection are clean and tight I double checked. I have checked ALL fuses and they are good. Now here's the kicker, it will randomly have spark for about a second and try to fire then nothing it just stops sparking. It's getting fuel, I can smell it. Haven't been able to check my fuel pressure but it was fine before. Any help it's my DD and I go to worm tonight.
I have checked the crank sensor and changed it to be sure. The power wire is getting 12 volts and the ground is good. Now the signal wire I read you manually turn the crank and it should read 10volts but I'm only getting .03 or so. Even when you use the starter (says not to) still only 4 volts.
How I have the big 3:
+ Alternator to battery
- battery to frame
- battery to block
- battery to core support (factory one still)
Last edited by parks450; May 19, 2016 at 06:57 AM.
Launching!
Joined: Apr 2015
Posts: 257
Likes: 1
Assuming the engine is cranking, then I'd say some connection was either left out, is faulty or you have a blown fuse. Ignition Fuses; 47 or 50 could be blown - check them.
Did you assemble the wires and connectors or buy a preassembled kit? If you have no spark, then I'd try disconnecting the wiring harness at the coil packs and reconnecting them to ensure they are making good contact. You might also check the new wires for continuity.
Did you assemble the wires and connectors or buy a preassembled kit? If you have no spark, then I'd try disconnecting the wiring harness at the coil packs and reconnecting them to ensure they are making good contact. You might also check the new wires for continuity.
I assembled them, I just copied the factory wiring. I literally checked every single fuse in the one under hood and most under dash and all good. Nothing was touched other than the positive and negative battery wires I have looked over all the connections but can't find anything. I'm lost
