4.8 to LQ4 Swap. No spark
02-20-2011, 08:32 PM
#1
4.8 to LQ4 Swap. No spark
I know we have these threads all the time. We've checked, double checked, tripple checked the grounds. Done VATS relearn. I've even disabled the anti theft and still have no spark when cranking.
Getting a Crank Position Sensor code so we swapped it for the one that was in his 4.8. Cleared the code and it still came back.
Gonna check on getting a new one tomorrow if O'Reilly's is open but if that doesn't do it i'm stumped on what else to check.
Getting a Crank Position Sensor code so we swapped it for the one that was in his 4.8. Cleared the code and it still came back.
Gonna check on getting a new one tomorrow if O'Reilly's is open but if that doesn't do it i'm stumped on what else to check.
02-20-2011, 09:23 PM
#4
whatever is on an 04 lq4 should be the same as the 99 4.8
truck is a 99 and we used 02 injectors. I loaded an 02 6.0 LQ4 tune. I don't see how that would be any different than using an 02 4.8 tune and swapping displacement, ve and such.
I can switch to an 02 4.8 tune and make adjustments and try it again tomorrow. but I really don't see what the difference would be
I can switch to an 02 4.8 tune and make adjustments and try it again tomorrow. but I really don't see what the difference would be
02-20-2011, 10:06 PM
#7
Don't waste your money on a new crank position sensor Joshua, it's highly unlikely that the sensors from both engines went bad...I'd check all the wiring to the sensor and the terminals at the connector, as well as the wiring to the PCM. Any chance that the reluctor on the crank of the LQ4 got damaged?
