Egr woes after replacing everything...

[blysccr]

97 80 series. 181k. Had 401 code so I did some reading and got a new toyota egr valve, egr vsv, and the modulator deal.

New egr was bad from factory and vehicle ran horribly.

Put another egr valve on and it's amazing hoe well it drives. Even have been getting a calculated 15-16 mpg. Got 16.99 after highway and interstate this week. Crazy, I know!! Anyways my cel came on and took to toyota dealership to diagnose and they said the vsv is now the problem. It was a total pain to put the orig one in. At this point I'm ready to block it off. Any of you replace the parts and still throw codes?


Thoughts??


Thanks

 

[ChiTown]

Did you clean out the egr passage in the upper intake manifold?

Did you clean the vacuum ports on the throttle body and on the upper intake near the egr temp sensor?

Did you clean the temp sensor?

 

[blysccr]

cleaned everything but the temp sensor. I assume you mean the egr temp sensor? WIll do that right now.

my mechanic said everything was dirty, but wasn't more than 10-20% blocked.

thanks,

 

[ChiTown]

Yes the egr temp sensor.

Check for vacuum at all the hoses going to the modulator. It might take a blip of the throttle to get a reading on a gauge. If you don't see vacuum then re-clean all the ports and check the hoses for blockage.

 

[94SRUNNER]

Certainly pull the EGR temp sensor. It will likely be caked with carbon. When I had 401, I used a brass brush and removed a couple millimeters of carbon. I also cleaned the passage as best could. Afterwards the code was gone. Prior to that I replaced all the vacuum lines with no change. All the other components checked out.

 

[blysccr]

cleaned. had a covering of carbon, about the thickness of a sheet of paper, two sheets thickness at the tip. pulled neg terminal. will drive later.

thanks guys

 

[blysccr]

cel came on today. will triple check the vacuum lines.

argh

 

[blysccr]

every line I pulled seems to flow fine.

about to just block it off and jump the temp sensor. This is ridiculous....