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EO53


jng29

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i can use some help here... 92 seville runs pretty good except i cant pass emissions inspection, i failed for NOx first time 1250 (850 is passing) so i ran codes and saw an egr code , at which time i replaced the egr (the ports under it looked to be clean too) did a tune -up (plugs, cap , rotor) and went back to retest emissions and now the NOx was 1350 even higher than first try , i am also getting a new code EO53 can anyone give me some direction to go with this except to a crooked dealer ?

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EO53 Distributor Signal Interrupt

Have a look (and/or replace) at the distributor cap/rotor next.

Code list by system for that year:

http://www.caddyinfo.com/stscodes.html

Bruce

2016 Cadillac ATS-V gray/black

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That is a 4.9, right? Don't forget to rod out the 2 EGR tubes down in the TB bore. That is where they get carboned up.

That is a 4.9, right? Don't forget to rod out the 2 EGR tubes down in the TB bore. That is where they get carboned up.

how far down from where the EGR mounts do the tubes foul up???? i replaced the cap, rotor and plugs and thats when i started getting the eo53 code by the way,,,,,,,,how do you clean the tubes out?? will the debris get into the engine if i just were to shove heavy wire thru the tubes???

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The tubes are down in the TB. Remove the air filter duct and look down the TB. They will be staring back at you. Just rod them out with a coat hangar if they are carboned up. Vacuum out what you can. The rest will just get ingested, burned and spit out the exhaust.

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