Reno 9
Active Member
Hi All,
Did not post anything since a long time, but i really do have a big issue for more than 2 month of work.
I was running F7R block with F7P head with some good modes and it was running perfect until i decided to go back to F7P and boost it.
My F7P was running healthy however i changed the Piston rings and full gasket and started the engine but it seems to run only 2 Cylinders 1 & 4:
Actions done to determine the issue:
1. Changed the whole Cylinder head everything attached to it with another one that i was using before.
2. Head gasket was new , however i changed it one more time.
3. Get a compression tester and found that all cylinders @ 130 PSI which is normal as i did not break in the engine yet.
4. For sure i do have a good spark on all Cylinders, however i changed the ignition Coil.
5. Tested the Injectors wiring and it is functioning well.
6. Changed the Injectors with another well known good injectors.
7. Did a injector flow test which shows that the 4 injectors having the same flow rate.
8. Checked the wiring and could not catch anything wrong on any of the sensors path, no short circuit , no resistance with any of the sensors and ECU wiring.
9. Changed the Piston rings again however the compression tester did not show any leak but i changed the piston rings again.
10. 3 new sets of sparks and every time they shows too black specially on the 2 working Cylinders 1 & 4
11. New Fuel Pump and filter.
12. Fuel pressure was tested.
13. Was using external Fuel pressure regulator which changed as well with new one and now tried the original Fuel pressure regulator which on the fuel rail.
I do have a Wide-band installed so i can see that the car is lean about 16 to 17 AFR however it makes Black smoke from the exhaust .
Once i disconnect the Spark plug of Cylinder 2 and 3 i feel no difference but the wide-band shows reach 13 AFR.
However if i disconnect the injector 2 or 3 and try to start the car it will no start.
Will be so happy i anyone has any suggestion for this problem.
Thanks,
Did not post anything since a long time, but i really do have a big issue for more than 2 month of work.
I was running F7R block with F7P head with some good modes and it was running perfect until i decided to go back to F7P and boost it.
My F7P was running healthy however i changed the Piston rings and full gasket and started the engine but it seems to run only 2 Cylinders 1 & 4:
Actions done to determine the issue:
1. Changed the whole Cylinder head everything attached to it with another one that i was using before.
2. Head gasket was new , however i changed it one more time.
3. Get a compression tester and found that all cylinders @ 130 PSI which is normal as i did not break in the engine yet.
4. For sure i do have a good spark on all Cylinders, however i changed the ignition Coil.
5. Tested the Injectors wiring and it is functioning well.
6. Changed the Injectors with another well known good injectors.
7. Did a injector flow test which shows that the 4 injectors having the same flow rate.
8. Checked the wiring and could not catch anything wrong on any of the sensors path, no short circuit , no resistance with any of the sensors and ECU wiring.
9. Changed the Piston rings again however the compression tester did not show any leak but i changed the piston rings again.
10. 3 new sets of sparks and every time they shows too black specially on the 2 working Cylinders 1 & 4
11. New Fuel Pump and filter.
12. Fuel pressure was tested.
13. Was using external Fuel pressure regulator which changed as well with new one and now tried the original Fuel pressure regulator which on the fuel rail.
I do have a Wide-band installed so i can see that the car is lean about 16 to 17 AFR however it makes Black smoke from the exhaust .
Once i disconnect the Spark plug of Cylinder 2 and 3 i feel no difference but the wide-band shows reach 13 AFR.
However if i disconnect the injector 2 or 3 and try to start the car it will no start.
Will be so happy i anyone has any suggestion for this problem.
Thanks,