Questions & Answers for: Toyota 4Runner high emissions

...tailpipe. But when the oil is low, smoke comes out. Any idea what can be wrong? Any help would be highly appreciated. One more piece of detail to add... I also find oil inside the air filter ...

1998 4Runner smokes only when oil is low Symptom: visible blue smoke came out of tail pipe; checked oil level (very low); added oil (added 1 qt 5W-30 along with Motor Honey); and no more smoke (at ...

...emissions test with high CO and HC levels. It failed emissions test with hi CO and HC levels. What are the most common emission issues with these vehicles. Not sure, but did you replace the oxygen ...

emissions, maximize fuel economy and improve consumer comfort. The various control systems in vehicles are interrelated and controlled by multiple computers that constantly monitor vehicle performance