Mil comes on with p2004/ check valve stuck open. Where is the check valve located

Radio Code Pro

• 2200 Answers
• Posted on Dec 05, 2009

SOURCE: Code P2004 Bank 1 runners stuck open, What is the

Hi,

This code indicates Intake Manifold Runner Control Stuck Open, Bank 1

Its hard to be very specific about a fix on this as there are a few potential fixes including the outright replacement of the intake manifold. If the Manifold Flow Valve blades are seized in the intake manifold, the manifold will have to be replaced
However this code can sometimes have a very easy fix and if you are lucky you may find that it is caused by a split vacuum hose connecting to the actuator. A leak in the vacuum system will set the code and I suggest you check this out first as a potential cause.

Thanks for using FixYa.

SOURCE: Check engine light came on.

Hello, The fast idle on Startup is a normal setting for your motor. This is called the "cold start routine" and it is suppose to help create draft in the induction system and warm other components.

The problem with the runner can be from several things. There are Electric solenoids on some of the motors which may be seen as 2 pods on the Intake manifold. The Solenoids are used to either send Vacuum to the runner mechanism or to move metal rods attached to the "runners".

Sometimes the runners with Vacuum solenoids get stuck in one position. You need to check for Vacuum running through the Solenoid. For the type with metal rods that move, Ford used plastic clips to hold the rod shaft to the runner just beneath the place where the Solenoid mounts. The broken plastic clip can be replaced with a paper clip that you need to shape to fit. Or you can buy a Ford part made of plastic which will fail again.

The runner flaps themselves can be gummed up so bad that the Solenoids described earlier just can not move them. This style would need to have the Intake Manifold removed in order for you to lift out the runner plates and clean them.

I am going to explain what a "Runner" is and this should explain why there are several systems put in Ford vehicles. On some Ford engines, the breathing of the engine requires that the Intake manifold has 2 sets of intake passages. A single Intake design could not give both low-end and top-end Performance. The runner moves from one port to another and this is like having 2 Intake manifolds bolted on top of 1 engine.

When the runners can not move because of a malfuction, thats when you get Error Warnings and poor performance.

You need to identify the engine used in your ZX3 if there were optional engines. I wanted to give you a start on your repair with my Solution. You should be able to look at your motor and see which system you have and now know that a Rod-operated sytem can have broken clips, a Vacuum system can have bad Solenoids and so on. I hope this is very useful to you.

SOURCE: i have code p2004 that's

You may need to reset the ECM using a diagnostic tool.The memory will not auto update itself if you have replaced the missing rod.So it will need a reset.Hope this helps.

Jeffrey Turcotte

• 8991 Answers
• Posted on Sep 09, 2010

SOURCE: p2004 intake runner stuck open

Intake runners are controlled by vacuum actuators at the rear of the intake manifold (I think it takes a 8mm socket--two bolts for each actuator). First check them both for loose of bad vacuum hoses. You can remove the actuators and see it the runners are free to rotate--perhaps one is corroded and stuck. You can take the air horn off the intake manifold, if necessary, to free the runner; but you may need to buy a new gasket to reinstall. Let us know if you have more questions.