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Tom, ASE Certified Technician
Category: Car
Satisfied Customers: 25955
Experience:  ASE Certified Master Technician
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I have 1986 injected v8 3.5L idells rough..spark plugs..lean

Customer Question

I have 1986 injected v8 3.5L idells rough . Runs OK when hot restart after 15-20 min runs real bad 40 to 50 km max has burnt out 2 new spark plugs , charts show lean fuel mix. Let it cool down & it runs OK your thoughts ? also do you know of a Kam difflock agent- supplier in New Zealand or Aussie Thanks Nico
Submitted: 6 years ago.
Category: Car
Expert:  Tom replied 6 years ago.
Sounds like the injectors are leaking down causing this issue was this checked?
Customer: replied 6 years ago.
would this not be the case all the time ?we did disconect injectors & fuel rail held pressure
Expert:  Tom replied 6 years ago.
You would need to do a fuel injector leak down test to be sure .This definitely sounds like the issue. I would start here next.