s7tech
NAXJA Forum User
- Location
- Orange, California
Well me and couple of buddies, and a little bit from Bennie at Hesco and Ive gotten no where. My orginal 4.0 was throwing codes for random cylinder missfires. Found oil in my coolant, so long story short I got a smoking deal on a Hesco built 4.5 with an alumium head. Swapped motors and still getting the missfires codes. What I have Is a 2001 with the 2 pre-cats after the manifold, with 2 O2 sensors before the pre cats and 2 after. I am currently running with stock injectors. I called Bennie at Hesco and he said that he was supprised it runs with the stock injectors and sent me 24 pounders. I put them in tonight and it runs like crap, it is runnning really rich with the new injectors. So I swapped them back to stock ones so I can still drive it. I have pulled the valve cover and adjusted the push rods, with no changes. My next step is to find someone with a 2001 so I can borrow their computer and see if it helps. I was wondering if anyone has had simular problems. I have also had the dealer put the most up to date flash in it which makes it less prone to the misfire issue.
Thanks for any help.
Thanks for any help.