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you mike check under drivers seat below the truck some body possibly change exhaust man before to a older one 89 4 runners has o2 sensor under driver seat outside 86 had a sensor on manifold check if yours is hooked up to the tailpipe under the floor when i origly changed my engine had 1 bare 02 sensor on manifold and it always would lean out and get hot, wireing somewhat different decided to do swap instead of dealing with real problem beleaved maybe different computer
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bigblockyota 884runner chevy 454 fuelinjected fullsize chevy dana 60 axles 14bolt rear 5.38grs spools frt,rrear 4wheel disc conversion tur400 trns 203 dbler 205 tranfer aprox 8-10 inch lift 37inch tslboogers 3inch magnaflow exhaust msd ingn aluminum rad ,flex fan 56 , inch spring conversion w8000lbcomp winch and bumper and just added a full hydraulic psc steering kit
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