6.0 6l90 swap crank but no start This is my first post so if it is in the wrong section I apologize. I have a l96 6.0 I'm trying to get started in ny 87 chevy 4x4. It's an e78 ecm tuned by black bear performance. It turns over and cranks but wont start. It has spark and fuel in the rail but no fuel seems to be getting into the cylinder due to the spark plugs looking lean and has no kind of gas smell. All the connections seem to be good and plugged in correctly along with the fuse box. The fuel pump primes correctly and the selector valve works correctly. It did try to start with some starting fluid sprayed on the air filter but never took off. The motor only has 3600 miles on it and it was running in the van when I pulled it out in may. I did email black bear but no response yet. The injectors do have power coming to them correctly. I'm not sure if they pulse or not though. I'm really stumped what could be causing this issue? Black bear said the vats was removed when I got the tune. thanks! |
If it was VATS it would fire then shut off. Check all connections and grounds. It's easy to miss one or more. Also check the crank and cam sensors. |
Originally Posted by G Atsma
(Post 20010564)
If it was VATS it would fire then shut off. Check all connections and grounds. It's easy to miss one or more. Also check the crank and cam sensors. |
So the injectors do have 12v when the switch is on. I dont know if they're pulsing or not though when I try to crank it. I'll test it with the noide light this weekend. If the tune didnt delete the vvt (since I deleted the vvt) would that cause a no start? |
One thing not mentioned so far- GROUNDS . Check EVERY one. |
Originally Posted by G Atsma
(Post 20011004)
One thing not mentioned so far- GROUNDS . Check EVERY one. |
Originally Posted by G Atsma
(Post 20011004)
One thing not mentioned so far- GROUNDS . Check EVERY one. |
Check a wiring loom pic and see if any needed grounds were bundled with any wires you cut off |
Originally Posted by G Atsma
(Post 20011075)
Check a wiring loom pic and see if any needed grounds were bundled with any wires you cut off |
Well all grounds are good. The computer tune has VATS deleted. Its sparking so I'd think the crank sensor is fine. Any other ideas? |
Anyone? |
What about injectors? Injecting? |
Is it getting fuel? Check the TPS, if its reading wrong it may also give you some issues, I have heard. |
Originally Posted by G Atsma
(Post 20012590)
What about injectors? Injecting? I'll be slapping a noid light on it tomorrow. Is there anything else it could be? |
Originally Posted by 461rat
(Post 20012592)
Is it getting fuel? Check the TPS, if its reading wrong it may also give you some issues, I have heard. |
Originally Posted by 461rat
(Post 20012592)
Is it getting fuel? Check the TPS, if its reading wrong it may also give you some issues, I have heard. |
Check all injector connections AND recheck the grounds. It's easy to miss something |
Originally Posted by G Atsma
(Post 20012605)
Check all injector connections AND recheck the grounds. It's easy to miss something |
Vats Hi, I swapped L96 to my jeep. Vats is more complicated on gen4 and I did not get it running until disabling that, not even a splitsecond hope that you find it Asgeir |
It's not at all unlikely that all 8 injectors could be stuck from sitting for 7 months with the crap gas we have these days. Put a nod light on it and if it's getting a pulse, then pull the rail and see if they are spraying, if not soaking them in Seafoam overnight will usually loosen them up. |
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