 What is the difference between a, 74 L-Jet and a 75 L-Jet |
|
|
|
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. |
|
|
| jsayre914 |
  Apr 29 2009, 10:20 AM
Post
#1
|
|
Speed Up !!!  Group: Members Posts: 3,210 Joined: 10-February 08 From: Timonium MD 21093 Member No.: 8,696 Region Association: MidAtlantic Region  |
I was told the 74 and 75 L-jet for a 1.8 motor is different. I was wondering what exactly were the differences, and can you see them just at a glance. If anybody would like to post a picture please do... (IMG:style_emoticons/default/popcorn[1].gif)
|
   |
 
|
  |
Replies
| ClayPerrine |
May 1 2009, 06:48 AM
Post
#2
|
|
Life's been good to me so far..... Group: Admin Posts: 16,490 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille 
|
The pin numbers on the air flow meter are the key. 7 pins is a 75. 6 pins is a 74. The wiring harness and ecu are definitely different. If you put a 75 ECU on a 74, you will get rich running.
The difference in the AFM is that in 74 the air temp sensor in it used a common wire with the meter part. In 75 they made them separate. All of the other parts on the L-Jet will interchange between 74 and 75, but the harness, AFM and ECU have to be from the same year. And don't even think about using the L-Jet from a 912E. It has different locations for the plugs for the power and ECU, and it only uses one contact in the throttle switch circuit. |
|
|
|
Posts in this topic
jsayre914 What is the difference between a Apr 29 2009, 10:20 AM
brant I think you mean 1974 vs 1975
no L-jet in 73
Djet... Apr 29 2009, 10:32 AM
jsayre914
I think you mean 1974 vs 1975
no L-jet in 73
Dje... Apr 29 2009, 11:52 AM davesprinkle
I think you mean 1974 vs 1975
no L-jet in 73
Dj... Apr 29 2009, 01:44 PM davesprinkle
I was told the 73 and 75 L-jet for a 1.8 motor is... Apr 29 2009, 10:32 AM zonedoubt
I was told the 73 and 75 L-jet for a 1.8 motor is... Apr 29 2009, 10:34 AM ArtechnikA
L-jet is on '74 and '75 1.8L only.
...and... Apr 29 2009, 10:54 AM orange914
L-jet is on '74 and '75 1.8L only.
...an... Apr 29 2009, 10:31 PM r_towle I would suspect the ECU and the AFM are designed i... Apr 30 2009, 05:47 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 1st August 2025 - 03:48 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.