![]() |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
![]() |
gnomefabtech |
![]()
Post
#1
|
Member ![]() ![]() Group: Members Posts: 147 Joined: 27-December 22 From: Los Angeles Member No.: 27,063 Region Association: None ![]() |
Car came from Nevada but I can't tell if it was originally a California car. It still has injection but doesn't have a cat or smog pump. Doesn't look like it ever had either but I'm wondering since I'm going to try and register it here in California. Thanks in advance!!
Here is the Vin: ![]() ![]() ![]() |
![]() ![]() |
L-Jet914 |
![]()
Post
#2
|
Member ![]() ![]() Group: Members Posts: 342 Joined: 24-October 12 From: Davis, CA Member No.: 15,080 Region Association: Northern California ![]() |
The secondary air injection pump was added to help introduce O2 into the exhaust upstream of the catalytic converter to help it light off quicker and as stated help the catalytic converter start oxidizing the HC and CO being produced by the engine earlier. The Toyota Tacomas with the 2TR-FE and 1GR-FE engines still have secondary air injection pumps and diverter valves to this day. Grant it the 1GR 4.0L was phased out on the Tacomas which is now a 2GR-FKS 3.5L no EGR valve/EGR cooler or secondary air injection system. The current 4 cylinder Tacomas still utilize it. The 2UZ-FE 3UR-FE/FBE engines also utilized the system. All in the name of emissions control and getting the catalytic converters to light off earlier. It seems manufacturers have either decided to add them or remove them over the years depending. Hell even today the new Toyota A25A-FKS/FXS and M20A-FKS/FXS engines now have EGR valves and EGR coolers tacked back on to lower combustion temperatures again. Toyota used to use there VVT systems as EGR holding the exhaust valve open longer which acted like EGR. I guess it's not enough anymore haha.
|
wonkipop |
![]()
Post
#3
|
Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 4,757 Joined: 6-May 20 From: north antarctica Member No.: 24,231 Region Association: NineFourteenerVille ![]() ![]() |
The secondary air injection pump was added to help introduce O2 into the exhaust upstream of the catalytic converter to help it light off quicker and as stated help the catalytic converter start oxidizing the HC and CO being produced by the engine earlier. The Toyota Tacomas with the 2TR-FE and 1GR-FE engines still have secondary air injection pumps and diverter valves to this day. Grant it the 1GR 4.0L was phased out on the Tacomas which is now a 2GR-FKS 3.5L no EGR valve/EGR cooler or secondary air injection system. The current 4 cylinder Tacomas still utilize it. The 2UZ-FE 3UR-FE/FBE engines also utilized the system. All in the name of emissions control and getting the catalytic converters to light off earlier. It seems manufacturers have either decided to add them or remove them over the years depending. Hell even today the new Toyota A25A-FKS/FXS and M20A-FKS/FXS engines now have EGR valves and EGR coolers tacked back on to lower combustion temperatures again. Toyota used to use there VVT systems as EGR holding the exhaust valve open longer which acted like EGR. I guess it's not enough anymore haha. you are a little smog genius just hiding away there laughing at us all! but for sure mate, your insight solved the mystery of the old L jets. (IMG:style_emoticons/default/beerchug.gif) (IMG:style_emoticons/default/beerchug.gif) (IMG:style_emoticons/default/beerchug.gif) |
![]() ![]() |
![]() |
Lo-Fi Version | Time is now: 11th May 2025 - 09:10 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |