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Category: Ford
Satisfied Customers: 24127
Experience:  ASE CERTIFIED TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
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Ford E150 econoline: P1131 know of any common problems to narrow this

Resolved Question:

have2002 ford E150 econoline- codes P1151 ,P1131 know of any common problems to narrow this down? thanks for any help
Submitted: 6 years ago.
Category: Ford
Expert:  AMEDEE replied 6 years ago.



There is a very common problem on this engine with vacuum leaks between the middle intake plenum and the lower intake manifold. These leaks, however, tend to be present ONLY when the engine is cold, and will be worse during cold ambient temperatures. Ford has revised parts to cure the problem, consisting of new "isolator bolts" that bolt the middle plenum to the lower intake, and new "port gaskets" (o-rings) between the middle plenum and lower intake.

2. If using a smoke machine to try to prove this, it usually will not show any leakage unless the engine is stone cold. Also, some leakage from the Exhaust Gas Recirculation (EGR) valve, the Idle Air Control (IAC) valve vent, and the Intake Manifold Runner Control (IMRC) levers IS normal.
Potential Causes: Leaking Intake - cold.

There is also a TSB for this problem as well.

AMEDEE and 4 other Ford Specialists are ready to help you
Customer: replied 6 years ago.
does this cause the engine light to stay on all the time? warm or cold engine?
Expert:  AMEDEE replied 6 years ago.