Wj 2.7 crd p0243 error
 

Hi to all. Im hoping that someone might be able to help me. I have had this error for the last 10 months I have checked the vacuum line multiple times replaced a few sections, taken the vacuum solenoids apart and cleaned them. I now have it where I can drive it hard without the error appearing. It only appears when I cruise at between 110 and 120 km/h. She does seem to be down on power when driving hard. Can this be a blocked egr valve. I have tired to take it off but after removing the two bolts I cant remove it. Is there a way of removing a stuck egr valve? What is the best way to check for a pinhole in the boost pipes.

Some other things I have done to rectify the problem

Replaced the metal gasket between the turbo and the DPF.

Replaced the stainless steel C clip

Tried a spare turbo - but has issues with the vanes.

Checked all of the earths that I could find.

Replaced the battery terminals

How much boost is the turbo meant to make?

Any help would be a greatly appreciated.

Kind regards

Damien

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The description of the code is:
P0243-TURBOCHARGER WASTEGATE SOLENOID CIRCUIT OPEN CIRCUIT. . . . .64
P0243-TURBOCHARGER WASTEGATE SOLENOID CIRCUIT SHORT CIRCUIT . . .67

Try swapping the EGR solenoid with the VNT(turbo) solenoid, they are the same part.

IMO this is not turbo or boost related. Do you have the manual to check the diagnostic procedure for these codes?

Hi Adrian D

I have tried swapping the two solenoids still the same issue. I do have the manuals busy reading through the procedure for the P0243 error. I do have a few questions. When checking the asd relay do you remove it? Which pin must be checked to ground? In step 4 which pin on the ecu is the wastegate circuit? I did find a website that had a step by step procedure with images but I cant find it again.

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I found it

http://www.fixya.com/cars/t9129697-j...erokee_2_7_crd

Ill try this on the weekend.

Is there a way of removing a stuck egr valve?

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Try to rotate it and wiggle it around.

Still based on the code I think your problem is electrical. All the schematics and pinouts are in the complete manual.

http://colorado4wheel.com/manuals/Jeep/WJ/

Ill try to take it off when the engine is at temp.

I agree. Will be working through the wiring on the weekend. It just baffles me that it only happens 4th and 5th at highway speeds. I dont get the error driving around town.

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Thank you for your help ill keep you posted

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I finally got round to working through the fault finding in the manual. In test when checking the the wastegate circuit to ground i dont get any reading on the multimeter. But when I check the circuit to the ECM it is under 5 ohms. From what I can tell there is no problem with the wiring I did however notice a leak between the DPF and the metal exhaust gasket which I had previously tried to seal with Holts fire gum as the gasket that I had bought from a mercedes agent was a little smaller than the one I was replacing. I have since cleaned all of the fire gum off but the leak is worse. Does anyone know how far from the edge must the gasket sit in order to create a good seal?

I have spoken to a turbo specialist and he recommended that I remove the DPF. Has anyone done this before? Would this cause any problems with the engine as I know that it requires some back pressure?


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In UK the 2.7 doesn't have a DPF is it different in Australia?

It has a catalytic converter on the back of the turbo only, no dpf.

Jason

That's what I thought. So much for specialist advice :D

Im in South Africa. While doing research into all the issues I have experienced I came across a few references that called it a DPF and not a CAT, but I could be wrong. Would a blocked CAT cause the issues with the wastegate?

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@Jeephawk, you should delete the DPF asap.
(its a Deposit Particle Filter, and not a Catalytic Converter).
Tends to clog and create several issues.
Another thing is that it keeps the exhaust temps very high.
Deleting it, turbo, exhaust valves etc, are much more happier and cooler.

Take a look here:

http://www.ausjeepoffroad.com/forum/...ight=tpap+inox

Hi Tpap. Thanks for the info. I take it that there is no aftermarcket pipe that can be bought. This pipe would have to be a custom manufacture. Which exhaust gas gauge did you fit?

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Exactly.
The downpipe is custom made, the same dia of the turbo outlet 75mm or aprox 3'' all the way down.

If you check the factory config with the dpf, you'll notice that the exhaust dia is getting smaller at 50mm after the filter and that means extra restriction.

I advice you to make an overall new exhaust at 3'' dia and also don't forget to make the muffler removable, so it could be easily taken out for cleaning.

I had the internals of the DPF gutted on Saterday and no more wastegate error. I will have a custom pipe made just need to find an exhaust gas temperature gauge.

Im trying to determine if the turbo may have gotten damaged due to the blocked DPF. Has anyone taken notice of the temperature of the air intake compared to outside ambient temperature. While the ambient temperature outside was about 30 degrees on Saterday. My intake was sitting about 41 to 44 degrees at highway speeds. I have a suspicion that there might be a leak from the exhaust side of the turbo.

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it's a catallytic converter. dpf's inject diesel into them to burn the soot at intermittent times.

No DPF's on 2.7's WJ's - definitely cat convertor fitted close to turbo . One of my 2.7's was fitted with mandrel bent 3" sports exhaust running directly off turbo - no cat convertor - just one sports muffler near rear of vehicle - ran fast ,lower fuel consumption (7.2 lts per 100klms on trip) and cooler .Only downside was it stunk at idle when cold ! Cost close on $1000 when previous owner had it fitted by custom muffler shop 5 years ago .