Hi Guys,
I am experimenting with the wps500 transducer and can't seem to get a consistant waveform from the pressure reg diaphram. using Range3 seems most consistant, is idle or holding at revs going to make a difference? (just closer pulses?)I have tried zoom3 but the screen allready seems quite noisy before I even start vehicle? any help or thoughts appreciated
cheers darren

Darren,

If I understand the question right.....

The WPS isn't sensitive enough to do fuel rail pulses hooked up to the regulator vac nipple.  That's one thing the FirstLook sensor can do well that the WPS cannot.

Can you post your capture please?

Hi Tom

Looks like we posted at  about the same time. I haven't tried the WPS on a reg yet.

dcsvan,
with the right adapters you can hook up to the fuel rail and measure actual pressure drops.

I tried direct fuel pressure couple of times but a system with good pump flow tends to flatten any pulses

thankyou for the replies,
I will try hooking up to the fuel pressure and see if I can get a some signal.

I was looking through some files I had stored and this is what I found.

The scope is set up at 5 sec/div.

CH A #1 sync
CH B WPS at rail

There are no pulses visible until you zoom in horizontally.

It appears that each injector drops an average of 2.25 PSI.

The file was 9MB and too large to post.

Hope these pics help.

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