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  #1  
Old 07-10-2011, 02:42 PM
spkrman005 spkrman005 is offline
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Default What does DTC 334 "ACTUALLY" mean???

Failed CA. smog with both COs and NOX being off the charts,almost 2 times max allowed. Ford OBD1 code reader came up with Diagnostic Trouble Code #334;"EGR closed valve voltage high". I'd hate to replace the EGR just to find out that something else was sending high voltage to EGR ,causing the valve to close. Any help would be great.
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1993 XLT 2.3L 4cyl
Mods:the P235/75R/15's were on it when I bought it;installed Pioneer Super Tuner,ADS tweets,5" Nakamichi door spkrs,and Infinity BassLink.Monroe Sensatrack front shocks,Monroe air shocks in rear.All else is stock
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Old 07-11-2011, 02:46 AM
Maritime Storm Maritime Storm is offline
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Default Re: What does DTC 334 "ACTUALLY" mean???

Try cleaning it first, sounds like it may be stuck
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  #3  
Old 07-11-2011, 07:20 PM
spkrman005 spkrman005 is offline
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Default Re: What does DTC 334 "ACTUALLY" mean???

Already pulled EGR off and cleaned what i could. I don't believe I can just squirt something into there,so how can I lube that shaft/piston,or whatever it is in there?
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1993 XLT 2.3L 4cyl
Mods:the P235/75R/15's were on it when I bought it;installed Pioneer Super Tuner,ADS tweets,5" Nakamichi door spkrs,and Infinity BassLink.Monroe Sensatrack front shocks,Monroe air shocks in rear.All else is stock
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  #4  
Old 07-27-2011, 11:10 AM
pad2383 pad2383 is offline
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Default Re: What does DTC 334 "ACTUALLY" mean???

Wondering if you ever were able to fix the problem. My 92 just failed smog with the exact same problem. If you gained any helpful expertise, I'd appreciate it. Thanks.

Pad
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  #5  
Old 07-28-2011, 09:51 PM
spkrman005 spkrman005 is offline
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Default Re: What does DTC 334 "ACTUALLY" mean???

After pull'n EGR off n clean'n out the port,it fail'n AGAIN! Nox where nearly double what's allowed. Seem'd all that was left was the CAT.! Had another off my previous Ranger(stock),failed AGAIN!! Drop'd $250 on a new universal CAT.! New CAT. cut 3/4 of the NOX,came out measuring 1/2max allowed!! If u test'd EGR n it's work'n,only other componant on EGR line is the CAT.. I guess it changes one gas to another!! Get;n way bet'r mileage no also!! GOOD LUCK Pad!!!!
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1993 XLT 2.3L 4cyl
Mods:the P235/75R/15's were on it when I bought it;installed Pioneer Super Tuner,ADS tweets,5" Nakamichi door spkrs,and Infinity BassLink.Monroe Sensatrack front shocks,Monroe air shocks in rear.All else is stock
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  #6  
Old 07-30-2011, 12:42 PM
killj0y killj0y is offline
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Default Re: What does DTC 334 "ACTUALLY" mean???

umm of course the cat changes the gas spkrman005 thats the whole point of it's existence. It is a catalyst that changes harmful exhaust components into not so harmful ones.
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  #7  
Old 07-31-2011, 01:06 AM
spkrman005 spkrman005 is offline
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Default Re: What does DTC 334 "ACTUALLY" mean???

oh,well excuuuuse me,for being so stupid!! But thanks for the post, "Mr. Ford Ranger Driver" Killjoy!!
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1993 XLT 2.3L 4cyl
Mods:the P235/75R/15's were on it when I bought it;installed Pioneer Super Tuner,ADS tweets,5" Nakamichi door spkrs,and Infinity BassLink.Monroe Sensatrack front shocks,Monroe air shocks in rear.All else is stock
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