AgRunner06

I replaced the EGR on a '96 LC and disconnected the battery for about 15 mins. I then drove the truck for about 20 mins and the light came back on. So do I still have a problem or do I just need to have the codes cleared with a scantool?

Thanks for the help.

4x4CPOSEADOG

Originally posted by 96_Runner06
I replaced the EGR on a '96 LC and disconnected the battery for about 15 mins. I then drove the truck for about 20 mins and the light came back on. So do I still have a problem or do I just need to have the codes cleared with a scantool?

Thanks for the help.


96_Runner06,

It seems to me that you have another problem other than the EGR code. The Haynes manual I use dictates that you have to pull the EFI fuse to clear the code. In your case, you just disconnected the battery and the code is still there. If you have an access to a scantool, then go ahead, use it and delete the code from there, but if you don't have the scan tool, I suggest is to leave the battery cables connected and pull the EFI fuse for about 10 minutes and then put in back on.

Now my question is, as soon as you connected the battery cables back on, the check engine light came off or on? If it was on, then I think you did not erase the code, or you may have another code stored in the diagnostic memory of the ECU. In this case, you need a scantool to positively pinpoint the problem causing the engine light to come on. I hope this helps.

Noel

AgRunner06

Thanks for the help. The light went out after I put the battery cables back on the truck. Then I drove the truck for about 20 minutes and the light came back on. From what I know there is two other things that could be causing the EGR code. One is the modulator and the other is the VSV. The modulator will be easy to replace. I can't seem to find the VSV though. The dealership wanted to replace all three things at once for some rediculous price so I figured I would just do it one piece at a time until I figured out what the problem is.

Could you tell me where the VSV is?

Thanks

4x4CPOSEADOG

Hey,
Yeah I will tell you where the VSV is located in the engine compartment, but give me a few minutes and I'll take a look at the manual to see where it is really located. Hang on and I will be right back.

Noel

4x4CPOSEADOG

AgRunner06,

The VSV is under the intake plenum where a U-shape vacuum hose is attach to it. Look at the EGR vacuum modulator, followed by the EGR Valve, then there is a hose running from the EGR Valve going through the intake plenum, under the intake plenum you can see a U-shaped hose and that's the VSV valve. It is hard to look at it without using an inspection mirror. Looks like a challenge to remove and replace it. Any question let me know.

Noel

AgRunner06

Thanks a lot for the help. No wonder I couldn't find that dang thing. Well, I think the next thing on the list to replace will be the modulator since it is really simple to do. If that doesn't fix the problem, then well, I guess I will have to struggle with the VSV. I'll let you know if I have any more questions.

Later