Question about 1998 Ford Windstar
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Posted on Jan 02, 2017
It could all be related.P1537/38 are the intake manifold runner controls are stuck open.They are controlled by vacuum solenoids.The P0171 is bank one of the engine is running lean,usually caused by a vacuum leak, P0420 is catalytic converter efficiency code. The computer monitors the switch rate of the front 02 sensors and compares it to the switch rate of the rear 02 sensors to tell if catalytic converter is doing its job. Now if the front 02 is not switching properly then this will cause this test to fail and set this code.
Look on bottom section of the intake manifold at the back of engine(where tranny bolts up) you should see the vacuum motors there on the intake,these are the control motors for the intake manifold runners.Make sure the vacuum lines are hooked up and lines are not leaking. Also you will see a lever from it to intake make sure they move and are not binding.
Posted on Mar 11, 2009
they are a ford specific codes they both are the same also :intake manifold runner control stuck open---the control is in the upper section of the manifold it may be stuck by sludge ,debris or carbon can try a carb spray cleaner if dont work may have to have repaired or replaced good luck
Posted on Jan 21, 2010
These are all related:
P1537 and P1538 are BOTH:
Intake Manifold Runner Control Stuck Open
P0171 is Lean Bank #1
P0174 is Lean Bank #2.
On the front of the Intake Manifold there are Plastic Clips. The Clips are currently broken and need to be replaced. Because these are broke the Computer is registering too much Air or not enough Fuel = Lean.
You should be able to purchase these at any auto parts store (call ahead for availablility).
After you replace these, all the Codes should disappear.
Let me know if this helped, or if you have addtional information or questions. Feel free to contact me at FixYa.com!
Posted on Jan 21, 2010
i went threw same problem its your runner control valves on the passenger side of your ford. theres two of them there s one right behind the altinator and the other is right next to it check them before changing them it could be these stupid little clips ford put on them to hold the hooks in place if they are broken it would cause your ford to shut off. if still cant find the runner control valves go to advanceautoparts.com under search type in runner control valve it ll show you a pic of it now for the clips you can buy them at ford dealer ship or buy door clips and use does which i ve seen done and i havent heard any complaints about it if there not broken try testing the runner control valve. this needs two people one to push on the gas the other to do the test by removing one of the hoses of the valves with your finger hold close the hose and tell the other person to push on the gas pedal if the other runner control valves moves then that one is fine and move on to doing the same to the other until you find which one is broken
Posted on Apr 07, 2010
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