Testing D-Jet FI, Got a few questions |
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Testing D-Jet FI, Got a few questions |
Spoke |
Apr 6 2008, 11:25 PM
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#1
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Jerry Group: Members Posts: 7,084 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
I'm prepping a 1.8L engine for the red 914 to replace the leaky 1.7L with one cylinder low on compression that's in the car. The installed engine has dual IDF40 Webers on it now.
When the PO bought the car, it had FI and was not running or was not running good. He took it to a local 356 shop and they pulled the FI and put on a single Weber just to get the car running. When the 356 shop moved locations, I received a box full of FI stuff from the car. My goal is to test each component and get the FI running again. I've tested most of the components including the distributor contact points, temp senders, throttle switch, and MPS. For the MPS, I just tested for vacuum leakage. It was leaking pretty badly so I took it apart and sealed it. I'll test it when I test the FI brain. I got a few questions that I'll get to in a few posts. First question is will it damage injectors if they are operated w/o fuel pressure? I plan to run the brain with injectors dry. Here's all the stuff I received: Attached image(s) |
root |
Apr 7 2008, 07:38 AM
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#2
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Two Wheeled Type4 Completed! Group: Members Posts: 849 Joined: 5-May 04 From: Sterling, VA Member No.: 2,026 Region Association: None |
Spoke,
I haven't scoped the injector voltage myself but if you look at 'banders' site he got a very similar result to yours and it makes sense 'cause the injector coil is inductive causing it to appear as a high impedance upon the initial step pulse from the ECU driver transistor. In milliseconds the injector coil impedance drops down low hence the corresponding voltage drops. http://members.rennlist.com/pbanders/ecu.htm#D1-D2 I like what your methodology dude! A "Real seat of the pants" effort, which appears to be working! Let's see what happens when you pull a vacuum on the MPS now! (IMG:style_emoticons/default/aktion035.gif) |
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