2004 ford freestar 4.2 limited, van wont start and theres a p1518 code,the imrc valves open and close but van still wont start

P1518 - Intake Manifold Runner Control Malfunction (Stuck Open) The IMRC system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test. The test fails when the signal on the monitor pin is less than an expected calibrated range at closed throttle.

• IMRC monitor signal circuit shorted to PWR GND or SIG RTN
• Damaged IMRC actuator
• Damaged PCM

An IMRCM PID reading approximately near 1 volt at closed throttle may indicate a fault
video's on youtube

P1518 - Intake Manifold Runner Control Malfunction (Stuck Open) The IMRC system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test. The test fails when the signal on the monitor pin is less than an expected calibrated range at closed throttle.

• IMRC monitor signal circuit shorted to PWR GND or SIG RTN
• Damaged IMRC actuator
• Damaged PCM

An IMRCM PID reading approximately near 1 volt at closed throttle may indicate a fault
It's part of the intake manifold . View P1518 on youtube .
2000 150 4 2L V6 Fault Code P1518 IMRC

I am assuming you mean F150 truck.
The answer is maybe.
Code 305 and 306 are missfire codes for cylinders 5 and 6.
Code 1518 is for a problem with the intake manifold runner control which could cause the other two codes.

P1518 FORD Description The Intake Manifold Runner Control (IMRC) is monitored for failure during continuous or key ON engine OFF self-test.
Possible causes - Intake Manifold Runner Control (IMRC) harness is open or shorted
- Intake Manifold Runner Control (IMRC) circuit poor electrical connection
- Faulty Intake Manifold Runner Control (IMRC) actuator
- Faulty Engine Control Module (ECM)
Read more: http://engine-codes.com/p1518_ford.html#ixzz2KSN6Thui

Trouble Code: P1518

Intake Manifold Runner Control Shutter Valve (Stuck Open)
Possible Causes:


IMRC control circuit shorted to ground or to system power (B+) . IMRC shutter valve actuator is stuck closed . IMRC vacuum hose is loose or disconnected. PCM has failed .From the Mazda Repair guides.

P2004 - Intake manifold runner control (IMRC) stuck open (bank 1)
Description - This DTC is set when the IMRC is commanded closed, but the IMRC monitor indicated open. This DTC replaces P1518 and P1537.

Probable causes - IMRC monitor signal circuit shorted to PWR GND or SIG RTN
- Damaged IMRC actuator or solenoid
- Blocked vacuum hoses

Diagnostic aids - Monitor the IMRC and IMRCM PIDs. The IMRCM state should change when the IMRC is commanded open or closed.

This control valve generally is located on the back of the intake.

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code p1518= intake manifold runner control (IMRC) malfunction (stuck open)

the intake manifold has two runners per cylinder, feeding each of the cylinder heads
the IMRC assemblies are located between the intake manifold and two air passages for each cylinder.
one air passage is always open and the other passage switches from means of a valve plate.
below 3000 rpm, this valve plate is closed to improve low speed performance.
above 3000 rpm, this valve plate opens to improve high-speed exceleration.
the valve plates are opened and closed by the IMRC deactivation by the powertrain control module
(pcm) if your car or truck is not affected by the error code, the pcm may need to be reprogrammed
so that the error does not come up again. or you can connect an obd2 scanner and reset ever y time
it comes up. good luck!

you need to make sure that the control solenoid has vacuum and power and ground at the connector, or it will set that code. as long as you did not drop the plenum would should be fine, locate the control solenoid you should be fine

P1518 - Intake Manifold Runner Control Malfunction (Stuck Open) The IMRC system is monitored for failure during continuous, key ON engine OFF or key ON engine running self-test.

The test fails when the signal on the monitor pin is less than an expected calibrated range at closed throttle.
* IMRC monitor signal circuit shorted to PWR GND or SIG RTN
* Damaged IMRC actuator
* Damaged PCM

Hope this info helps

TRY ANOTHER COOLENT TEMP SENSOR

There is a technical sevice bulletin for this exact issue. Go to the dealer and request they reprogram the pcm. You should not pay more than a half hour labor, they'll probably try to get a diagnosis fee out of you. Tell them no, just reprogram the pcm to latest calibration. If this doesn't fix it, then repost or pay to chat, but that should fix ya.