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SVTPerformance's Chain of Restaurants
Road Side Pub
Emissions issue 99 4 Runner
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<blockquote data-quote="AustinSN" data-source="post: 16354522" data-attributes="member: 159453"><p>My buddy's 4 runner keeps getting failed for high NOx. 3.4 v6, slushbox, 4x4, non-cali truck, 260k miles or so.</p><p></p><p>These don't have EGR, we looked on various forums and most people suggest a new front O2 and a MAF cleaning, we did both of those on Saturday and while the NOx lowered, it's still failing.</p><p></p><p>Any other suggestions? We spent a good 20 minutes going through the vacuum lines, one was suspect on the end but we added a clamp to it and feel it's not an issue.</p><p></p><p>Next move is to put seafoam in the tank, and do a proper seafoam procedure. He already tried throwing a bunch of HEET in the tank and getting it retested but failed that too lol.</p></blockquote><p></p>
[QUOTE="AustinSN, post: 16354522, member: 159453"] My buddy's 4 runner keeps getting failed for high NOx. 3.4 v6, slushbox, 4x4, non-cali truck, 260k miles or so. These don't have EGR, we looked on various forums and most people suggest a new front O2 and a MAF cleaning, we did both of those on Saturday and while the NOx lowered, it's still failing. Any other suggestions? We spent a good 20 minutes going through the vacuum lines, one was suspect on the end but we added a clamp to it and feel it's not an issue. Next move is to put seafoam in the tank, and do a proper seafoam procedure. He already tried throwing a bunch of HEET in the tank and getting it retested but failed that too lol. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Road Side Pub
Emissions issue 99 4 Runner
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