anyone has a problem w/ P0401 code after install?

[jliu]

Just had the coldside installed last week. Everything was fine, idle, and power. The only problem is the car kept on throwing the P0410 code. This code is EGR insufficient flow. I have check the whole egr system and there was no restriction to be found. I also do not have any leaks as my car drives and idles just fine. I have been talking to Tom and he suggested that the ends of stainless steel tube that connects the EGR plate to the throttle body adapter may be a bit restricted. I will try to open them up a bit tonight and see what happens.
Anyway, do any of you who have installed the coldside have any similar issue?

Thanks

Jeff

[99mx5]

That could be the cause. The pipe cutter deforms the tube when its cut. You can use a drill to open the ends of the tube.

[jliu]

Did you also have this EGR error code too? If so, did you have to open up the endings on the tube to fix the code?

thanks

Jeff

[99mx5]

I havent ever received the code, but its the only thing I could think of that may cause a restriction in EGR flow.

[jliu]

Thanks. I will open the endings up tonight and will report back.

Jeff

[Banshee]

I posted this on the other section.

Make sure that the little compression fitting fits completely over the tube before you try and screw it in or else it will block off the tube.

[jliu]

Thanks to all that replied to my question about the P0401 error code.
Well, I returned home from work Friday night and with Tom's advise, I opened up both openings on the stainless steel tube that connects the EGR plate and the TBA. I then erased the P0401 code. Since then, I have driven over 60 miles and NO more P0401 code. Hopefully, it will stay that way.......
Now I am just waiting for the EVA monitor to return back to "ready" mode. Anyone has any idea how long before the EVA monitor will return back to "ready" mode. It has been 60 miles and all other monitors have returned back to normal.

Again, thanks to everyone especially TOM ! He answered all my calls even in the evenings and weekends......Can't ask for more than that!

Jeff

[99mx5]

Sounds like Fast Friendly Service to me ;)

[thrustn]

I have this same CEL code on my 2001. Tom told me to open both ends of the EGR tube as well. I will be doing this soon. Please let me know if your CEL code comes back on.

James

[Tom @ Fast Forward]

I got a new blade for my Stainless tube cutter. That should help. ;)

[jliu]

Finally, the EVA monitor returned back to "ready" mode. No more P0401 code either. So far, the car is running smoothly. Just waiting for the new injector to swap out the possible bad one.

Jeff

[John Miles]

Looks like my '03 has joined the Insufficient EGR Flow club. The code appeared last night while driving at highway speed. My coldside kit has approximately 200 miles on it.

I had to cut 1" from my stainless tube with a Dremel tool, but I remember deburring it reasonably well with an X-Acto knife before installation.

This morning at the shop I learned that my car has some type of exhaust obstruction (see other thread), so I'm not going to mess with the EGR hardware until after the exhaust problem is resolved. My guess is that excessive back pressure may be confusing the EGR flow sensor. Will post a followup when/if this theory holds water.

[raceskier]

Another datapoint on the P0401 EGR code. My non e-cooled Coldside has been running fine for a year and half until recently. Lately I've been having some cold idle issues, having to hold the revs manualy for 15 sec or so. I suspect a tired narrow band O2 sensor. Just Saturday, it threw a P0401 code. It sounds from other people's description that the low idle speed may force this rather than an EGR tube restriction.

[John Miles]

In my case, the problem was occurring at 80-100 mile intervals until I enlarged my stainless-steel tube with a drill. Been working on other issues for the past several hundred miles, and the code has not recurred.

I don't have idle-speed problems except for the need to goose the accelerator a bit immediately after startup. The cold-run behavior is a bit of a problem in general. I think I'm going to install some kind of 12V-operated vacuum switch to keep the PC Pro cards from seeing any boost until the ECU has had time to go into closed-loop operation.

[ThomS]

Finally, the EVA monitor returned back to "ready" mode. No more P0401 code either. So far, the car is running smoothly. Just waiting for the new injector to swap out the possible bad one.

Jeff

Sorry if this is a stupid question, but waht is a EVA monitor and where does it say back to ready mode?
I have that code and still have P1518, after new PC PROS installed, both of them. Tom Just installed them tonight and after driveing the car about 100 miles or so the codes came back. I know it is a short drive but I am going crazy............ Idle speeds are ok and I gethte code erase it and don't get it again for weeks and then it is back. I was hoping the PC PROs would cure it. I have a very smooth and great running car other wise.

[jliu]

The P1518 code is the VTCS malfunction code. I can not help you there.
Did you de-burr the ends of the stainess steel tube that connects the EGR plate and the intake manifold? Another thing to look at is the wire harness that comes out of the fire wall. That harness is VERY close to the EGR valve. Once the EGR valve gets hot it will melt the shealthing off the wire harness and will short out wires. This happened to me as well as a few others. I would have the P0401 code off and on until I adjust the positiion of the EGR valve away from everything.
The EVA is part of many monitors the car uses to keep track of different system functions. Everytime you erase an error code, those monitors(O2sensor, cat, eva) will be in a "non-ready" mode until certain drive cycles are completed. Each of those monitors will have a different drive cycle requirements. You should invest in an OBDII scanner. Mine has more than paid for itself since purchase.
Good luck.......

[ThomS]

Thanks fro you help. Yes I know very well about the EGR valve and what damage it can do. But thats not it right now. but will check to be sure. My SC has been in since last summer, the car did sleep all winter but just in last few months was the first that I can remember I have ever gotten that code. P0401 except for when the install was taken place and I did what you said to the wires by the EGR valve.
I have a code reader hand held one does it do more that just read the codes?

[Kyp J]

Just a guess, no actual knowledge has gone into this posting.

Is it possible that the little tube feeding the eg is of a marginal size and any variations may be enough to cause a code? The original equipment is the valve connected right to the manifold fed by a 1/2" or so pipe (I think.).

Also, the end of the crossover pipe nearest the exhaust manifold may be getting clogged with carbon. I think I saw that at one time or another on this or another forum. Or maybe it was for something else. Just some loose brain cells rattling around wanting to get out.