Anyway to test a 1.8 air flow sensor? |
|
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. |
|
Anyway to test a 1.8 air flow sensor? |
GaroldShaffer |
Feb 2 2009, 04:23 PM
Post
#1
|
You bought another 914? Group: Benefactors Posts: 7,624 Joined: 27-June 03 From: Portage, IN Member No.: 865 Region Association: None |
I have two 74 1.8 pars cars (I know, its a sickness) both cars are beyond running, but the air flow sensor looks to be in great shape. I would like to verify that they are working and other than installing them on a running 1.8 how can I test them?
yes I plan to sell them, but I don't want to sell non working parts. Thanks |
dr914@autoatlanta.com |
Feb 2 2009, 04:31 PM
Post
#2
|
914 Guru Group: Members Posts: 7,900 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
I have two 74 1.8 pars cars (I know, its a sickness) both cars are beyond running, but the air flow sensor looks to be in great shape. I would like to verify that they are working and other than installing them on a running 1.8 how can I test them? yes I plan to sell them, but I don't want to sell non working parts. Thanks most every time they just mechanically fail with the flap sticks. Make sure that you test it hot after it expands as the flap may not stick cold but may hot. |
r_towle |
Feb 2 2009, 05:07 PM
Post
#3
|
Custom Member Group: Members Posts: 24,591 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
It must send a voltage signal based upon flapper location.
First, Like the Doctor says, make sure the flapper works. Then, look for the pinout (check the L-Jet site in 914Info at top of page) Feed it with the right voltage on the right pin, it should provide a scale of voltage as the result. Rich |
ejm |
Feb 2 2009, 05:23 PM
Post
#4
|
I can see the light at the end of the tunnel Group: Members Posts: 2,695 Joined: 3-February 03 From: Massachusetts Member No.: 224 Region Association: None |
Inside the AFM there is a fixed resistance, a variable resistance and a switch. With an ohm meter and a diagram these components can be tested. The switch should close when the flap is opened slightly and the resistance should vary smoothly. The Dr. pointed out the common mechanical failure. On the electrical side the usual failure is wear of the wiper components causing bucking or flat spots. If the black cover has been removed someone may have tried adjusting it and it may never be right again.
|
Lo-Fi Version | Time is now: 16th June 2024 - 12:48 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 ... |