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Jim, ASE Certified Technician
Category: Honda
Satisfied Customers: 1317
Experience:  ASE Certified A6,A8,L1 and California Licensed Smog Technician
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Vinny we have a 2007 honda pilot 3.5 giving us po172 and

Customer Question

Hi Vinny we have a 2007 honda pilot 3.5 giving us po172 and p0175 I changed the map sensor still the same the long term fuel trim is about -15 on both banks short term is about -14 little still showing rich at 3k rpm fuel pressure is 60 psi at idle holds fuel pressure when shut off indicating no injector leak at idle inj pule 2.9 to 3.0 ms any ideas you can send would be greatly appreciated
Submitted: 1 year ago.
Category: Honda
Expert:  Jim replied 1 year ago.

Start by resetting the computer, by disconnecting both battery cables and rubbing them together, if the problem returns check the following.

Verify engine vacuum is 19-21 inches and the manifold absolute pressure sensor voltage is 0.85-0.95 at a warm idle. If the MAP voltage is high, the manifold vacuum is low. If vacuum is low, verify the timing belt alignment and valve clearance is correct. If the timing is on and the valve clearance is correct, then there is an engine mechanical issue usually caused by overheating the vehicle.

Customer: replied 1 year ago.
Expert:  Jim replied 1 year ago.