I am new to the "diagnostic world" of data and trouble codes. This was the only code Auto X ray spat out tonight. Any hints, clues??

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91 Formula
305 TPI 5speed
1LE/G92/WS6

Paxton SN93, SLP airfoil, ported/polished plenum, March pulleys, Crane AFPR(43psi),Crane Gold 1.6rrs,MSD coil,MSD6AL, Holley 9mm wires, fastchip, Bosch O2sensor, Bosch in-line pump(w/stock pump), SLP headers & catback,short shifter,3:73s w/Auburn posi,170* t-stat,JET 195* fan switch, Macewen white face gauges, Autometer gauges, Zoom hi-performance clutch.

 

TF,

Finding the ALDL was the hard part (you THOUGHT). Getting to the EGR is a real treat. I'm guessing the EGR diagnostic temperature sensor isn't happy, maybe because the valve isn't operating.



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Later,
Vader
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"No matter how hard you try you can't stop us now..."
Adobe Acrobat Reader 4.0

 

Clear the codes and see if it returns. A poorly burnt eprom can cause this code too. Generally, the eprom wasn't erased long enough. And if the code is encountered, until the ecm is cleared, it will remain for time immortal. Code may have been caused by the original Ed Wright eprom.

Now you know why I erased that eprom a tad longer than 15 minutes. I am not sure of Ed's source and I wanted to make sure it was cleared. And there is no guarantees that it will be long enough too. May have to erase it longer yet and reburn it again.

 

Thanks Vader and Glenn.

I run a Paxton blower. For the install, I had to do a few things. Tell me if any of these could of caused the code:

1. Plug PCV valve
2. Replace oil cap with a breather
3. Stick breather on passenger side valve cover
4. Removed "valve cover hose to throttle body" on passenger side valve cover. Then plugged the throttle body inlet.

All 4 things I was supposed to do for the blower install.....

[This message has been edited by theformula (edited February 10, 2001).]

 

Have you cleared the codes and re-tested it yet? You must do that first or you will keep picking up the old code.

If it reoccurs, then I would suspect that disabling the PCV valve and adding boost may make EGR not quite function properly. Instead of having vacuum to suck the exhaust gases, it now has pressure to work against.

Ask the guys on the Power Adder Board if they encountered this as I have limited knowledge of supercharger applications. Worst comes to worst, you may have to disable the EGR in the eprom and do a little "trouble shooting". Also, might have to play inside the eprom with the TPS Threshold of when Power Enrichment Mode (more commonly called WOT Mode) kicks in.

When you get your eprom burning equipment, these might be some of the things to try.

 

Oh, and one more thing, is your EGR and the scan reading look normal when you trigger a Code 32? (After you clear the initial?) Try timing it and see if you can find a "similar condition" that triggers it. For example, a certain time of engine operation or a specific load of the MAP or rpm? (PS: use Metric not English for the scans...Metric corresponds more to the GM conversions in the eprom and all MAP are in Kilopascals and temperature in Celcius).

Again I suggest this as I discovered that not quite erasing an eprom long enough, I would trigger a false Code 32. Everything about the operation of the EGR looked fine and it appeared to be functioning properly. Initially, I thought it might have been TunerCat putting "bad code" into my eprom. Ultimately I tracked it down to the erasing process of the eprom. Eproms take a little longer each time you erase them and reprogram them. I usually start at 15 minutes for a "virgin" eprom and after every 3 to 4 erases I will trigger a Code 32 which can occur after 10-30 minutes of engine operation. Load has no factor, just time. By adding an extra minute to the erasing time over the previous erasing time, it stops the Code 32 from occuring for another 3-4 erases; and I just add another minute again. Verifing the eprom or checking for "blank" is no assurance against triggering it, its strictly "plug 'er in, try 'er out".

I have one eprom that now takes 30 minutes to completly erase before I can reprogram it. But it is on its 25th reburn, and from what I understand, that is getting darn close to the maximum number of times before the eprom is "unuseable" (ie. while it may appear to erase and reprogram properly, it will constantly throw a false SES code). Consider this part of EPROM Programming 201.

 

I talked to Willie and he said to leave the plugged valve covers and breathers like that. It is necessary.

As for code32 Glenn, you just made me think of something. The EGR was functioning correctly when I scanned it. If it helps any, the code always gets thrown on highway driving. I was at idle when I did the scan yesterday.

But with that in mind, the MAP and EGR looked to be functioning correctly....

 

Probably your eprom is "out-of range". Don't worry about it. As I said, I occasionally get it if I haven't erased the eprom quite long enough. And yes, it shows up while I am just "putting along" cruising down the highway after 15 to 30 minutes.

Go with Willie's recommendation, he's one of the most knowledgeable people when it comes to Power Adders and would be the person I would talk with, besides Guido and ProchargedZ.