Obi..
03-18-2010, 09:21 PM
Post your vehicle spec's and results. If you can have your tech run a printout to post up even better.
Vehicle Spec: 1995 4Runner 2wd to 4wd and Automatic to 5-speed swap with a 3VZ-E 3.0 that has some minor hop ups and a performance exhaust system.
Ok, since I had to just replace a defective after-market catalytic converter, I went ahead and ran a sniffer test with just the new cat.
http://farm3.static.flickr.com/2518/4444813408_362988c510_b.jpg
The numbers although respectable still had me thinking I've seen my vehicle run a lot cleaner so I checked the primary O2 sensor and found out it was acting "lazy".
Lazy, as in not cycling through the specified varied range enough times in a given time span so I replaced the primary O2 and checked the secondary, now both were doing great.
I figure since I'm working again I'd go ahead and run it on the dyno smog just like California does and here's the results..
http://farm5.static.flickr.com/4052/4444816638_e1cd44baee.jpg
So basically, now that the O2's are reading better and the replacement cat is stronger, I am getting better conversion of the exhaust gasses. :wrenchin:
Mileage was 16 city, 18-19 highway last time around, I went ahead and refilled it and am gonna check it again in a couple of weeks. This round I am going with Shell 89 octane versus the Chevron 89 or 91 I usually run.
Vehicle Spec: 1995 4Runner 2wd to 4wd and Automatic to 5-speed swap with a 3VZ-E 3.0 that has some minor hop ups and a performance exhaust system.
Ok, since I had to just replace a defective after-market catalytic converter, I went ahead and ran a sniffer test with just the new cat.
http://farm3.static.flickr.com/2518/4444813408_362988c510_b.jpg
The numbers although respectable still had me thinking I've seen my vehicle run a lot cleaner so I checked the primary O2 sensor and found out it was acting "lazy".
Lazy, as in not cycling through the specified varied range enough times in a given time span so I replaced the primary O2 and checked the secondary, now both were doing great.
I figure since I'm working again I'd go ahead and run it on the dyno smog just like California does and here's the results..
http://farm5.static.flickr.com/4052/4444816638_e1cd44baee.jpg
So basically, now that the O2's are reading better and the replacement cat is stronger, I am getting better conversion of the exhaust gasses. :wrenchin:
Mileage was 16 city, 18-19 highway last time around, I went ahead and refilled it and am gonna check it again in a couple of weeks. This round I am going with Shell 89 octane versus the Chevron 89 or 91 I usually run.