Crank No Start Issue
Thread Starter
Burning Brakes
Joined: Mar 2010
Posts: 1,012
Likes: 7
From: Moore OK
Crank No Start Issue
Alright guys. Tried to fire my bucket of bolts up tonight but no dice.
Battery Voltage is good. No difference in start up with battery itself or on a 100 amp quick start.
All grounds accounted for. I did have one from the block to frame rail I missed. Attached it, no change.
Fuel pressure is good. 60 psi.
No security light. Like I said, cranks perfect, just won't fire.
Checked other grounds and they're good.
Checked fuses for injectors, coil packs, PCM. All good. Also checked associated relays, all fine.
Any ideas? Going to the shop early to check injectors and coils with test light.
Battery Voltage is good. No difference in start up with battery itself or on a 100 amp quick start.
All grounds accounted for. I did have one from the block to frame rail I missed. Attached it, no change.
Fuel pressure is good. 60 psi.
No security light. Like I said, cranks perfect, just won't fire.
Checked other grounds and they're good.
Checked fuses for injectors, coil packs, PCM. All good. Also checked associated relays, all fine.
Any ideas? Going to the shop early to check injectors and coils with test light.
Thread Starter
Burning Brakes
Joined: Mar 2010
Posts: 1,012
Likes: 7
From: Moore OK
I smell fuel when cranking.
Couldn't check spark as I was alone. But will be checking tomm
Thread Starter
Burning Brakes
Joined: Mar 2010
Posts: 1,012
Likes: 7
From: Moore OK
Nothing changed. Engine was out for heads to get checked out. Only change was a new clutch and transmission.
Tach is not moving while cranking. I've never paid attention to it before so I am not sure if it should be moving. I'll have to hook up my HP tuners to verify tach.
Tach is not moving while cranking. I've never paid attention to it before so I am not sure if it should be moving. I'll have to hook up my HP tuners to verify tach.
Thread Starter
Burning Brakes
Joined: Mar 2010
Posts: 1,012
Likes: 7
From: Moore OK
Tach is active when logging during cranking.
I'll check the MAP sensor, would be off for it to have went bad just sitting on the shelf.
All grounds currently hooked up are tight, I'm hoping I've maybe missed one somewhere. I'll log again to check the map sensor though
I'll check the MAP sensor, would be off for it to have went bad just sitting on the shelf.
All grounds currently hooked up are tight, I'm hoping I've maybe missed one somewhere. I'll log again to check the map sensor though
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Melting Slicks
Joined: Mar 2005
Posts: 2,225
Likes: 42
From: Okinawa
These are good for checking spark and I think you might be able to hear it if you are by yourself. Probably just something you missed when swapping heads like a ground that was already mentioned.
http://m.autozone.com/test-scan-and-...ter/10257_0_0/
http://m.autozone.com/test-scan-and-...ter/10257_0_0/
Thread Starter
Burning Brakes
Joined: Mar 2010
Posts: 1,012
Likes: 7
From: Moore OK
Checked spark, all good. I "think" it's a problem with the injector plugs, I'm fairly certain I had them plug in upside down if that makes sense. The plug on them I modified AKA cut the tabs off so I wouldn't have to install new ends. I'll check my theory tomorrow since I had to pull a fuel rail off that was leaking.
Drifting
Joined: Dec 2003
Posts: 1,755
Likes: 88
From: Pearland Texas
MAP sensor reading correctly? Not to shoot your injector idea down, because its totally possible since this is internet diagnosis and all, but you did say you smell fuel when cranking not that its definitive. Sure you have the cam and MAP sensors plugged in to the right sensor. Seen that happen a few times especially with boosted cars. So just check it on HPT and see if its reading right. Especially if you've done a swap to a front cover cam signal etc... Depending on the extension harness used they can be plugged in backwards too. GL! I'll bet its something super simple though.
Running Guns & Moonshine
Joined: Aug 2001
Posts: 12,669
Likes: 7,303
From: CT
I'm following this thread. I have similar but different no start issue. In my case I know I have spark and I know my grounds are good, but with new pump and wiring I do not have fuel PSI. New pump arrives tomorrow. New left side tank (stripped threads on fuel sender cover bolt holes) arrives whenever it gets here from Vettenuts. Hopefully THEN it will be all good.
GL with yours! Definitely check all your grounds. Back of the head. Block on passenger side under headers. And both forward locations in engine bay (aft of headlights on top of frame)
GL with yours! Definitely check all your grounds. Back of the head. Block on passenger side under headers. And both forward locations in engine bay (aft of headlights on top of frame)
Thread Starter
Burning Brakes
Joined: Mar 2010
Posts: 1,012
Likes: 7
From: Moore OK
MAP sensor reading correctly? Not to shoot your injector idea down, because its totally possible since this is internet diagnosis and all, but you did say you smell fuel when cranking not that its definitive. Sure you have the cam and MAP sensors plugged in to the right sensor. Seen that happen a few times especially with boosted cars. So just check it on HPT and see if its reading right. Especially if you've done a swap to a front cover cam signal etc... Depending on the extension harness used they can be plugged in backwards too. GL! I'll bet its something super simple though.
All sensors are stock and stock location as they came from GM. None of that changed from the original build in late 2011-12.
Melting Slicks
Joined: Jan 2008
Posts: 2,590
Likes: 48
From: Nathalie VA
St. Jude Donor '15-'16-'17-'18
Did you get both driver side grounds on the back of the driver head, and one on the passenger side?
I know you said you got all of them...but grounds deserve triple checks since they are such a pain in the ***.
Hit up Bill Curlee. He's a master of fixing weird issues.
I know you said you got all of them...but grounds deserve triple checks since they are such a pain in the ***.
Hit up Bill Curlee. He's a master of fixing weird issues.
Last edited by CamminC5; Apr 13, 2016 at 09:33 PM.
Drifting
Joined: Dec 2003
Posts: 1,755
Likes: 88
From: Pearland Texas
Ok so saying you logged them I'm guessing that means they were reading correctly. Hmm Well I know you said you checked the fuses, but Bill recently had his inj fuses popping under high boost pulls. So if all of them are not firing I'm saying stay on that check the those fuses specifically, and the ground on the back of the head that supply's the ground for them. Its easy to miss one being its behind the head. If none of that pans out your going to have to start checking continuity from the injector to the PCM.
Thread Starter
Burning Brakes
Joined: Mar 2010
Posts: 1,012
Likes: 7
From: Moore OK
All grounds have been triple checked. All fuses have been checked numerous times Nd even replaced just to be sure.
The one behind the head is stupid easy to get to since I have the cowl off and the big *** hole I cut in it back when I built this engine to clear the fuel rail and feed line, haha.
The P 1518 code is leading me in a new direction. Talked to Brett (blownblue) earlier and he thinks I left a wire from the S post on the alternator wiring that is supposed to go to the starter. We went over how many and what wires I have installed there and think we may have found the issue. That code also shows its face when there is a tac module problem, hence the wire he told me about. The car has thrown the reduced engine power on the DIC, but I paid it no mind.
The one behind the head is stupid easy to get to since I have the cowl off and the big *** hole I cut in it back when I built this engine to clear the fuel rail and feed line, haha.
The P 1518 code is leading me in a new direction. Talked to Brett (blownblue) earlier and he thinks I left a wire from the S post on the alternator wiring that is supposed to go to the starter. We went over how many and what wires I have installed there and think we may have found the issue. That code also shows its face when there is a tac module problem, hence the wire he told me about. The car has thrown the reduced engine power on the DIC, but I paid it no mind.
Last edited by jmuck; Apr 13, 2016 at 10:42 PM.