1999-2009 [Subscribe to Daily Digest] |
[Main 95 Bulletin Board | BBFAQ |
Prev by Date | Next by Date | Post Followup ]
Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Fuel pump scope testing interpretation - Anders? Posted by Snowmobile [Email] (#686) [Profile/Gallery] (more from Snowmobile) on Wed, 28 Jun 2023 11:39:13 Members do not see ads below this line. - Help Keep This Site Online - Signup |
So a week ago, while tracking down an issue with our 2005, I did some fuel pump oscilloscope testing with a current clamp on both our 2004 and 2005 side by side. Neither have the characteristic drop outs of a failing pump as per Anders' images (thanks for showing us all that!). Both are wavy smooth ripple signals that are not really sinusoidal... However, I noticed that the 2004 ripple is stable whereas the 2005 has some low frequency variation. The 2005 signal on the scope rises and falls rather than having a constant DC offset like the 2004. Have any of you run into something like this before doing this test?
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.