 FI system troubleshooting, Two FI components will not work |
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| Such914 |
 Jun 20 2018, 07:58 PM
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#1
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Newbie  Group: Members Posts: 2 Joined: 1-February 18 From: Wisconsin Member No.: 21,852 Region Association: Intermountain Region  |
Hello, my mechanic is finishing up a rebuild of my cars FI system, and we cannot get it to work. We have some parts we know are broken, but replacements haven’t worked either. Are there any known sources for these?
-Manifold Pressure sensor (known as the 'grenade') -Air bypass valve The issue that we are experiencing is misfiring and lack of power in the top end. Apparently they have tried 3 sensors to no avail. It is a ‘74 2.0. Thank you! |
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| 76-914 |
Jun 20 2018, 09:56 PM
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#2
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,513 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California 
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You can disconnect everything, except the MPS, and it will run. Repair kits are available thru Tangerine Racing. I don't remember the name of this do dad but it is like a volume control so you can adjust the ohm output. Unplug the head temp sensor and plug that in place and turn it to the value needed for cold engine. I can't remember that value either(I'm running a Subaru engine (IMG:style_emoticons/default/happy11.gif) ) Maybe 350 ohms (IMG:style_emoticons/default/confused24.gif) Or if you are sure everything else is OK just rotate the dial until it starts. You did verify that the CHT sender is good, correct?
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Posts in this topic
Such914 FI system troubleshooting Jun 20 2018, 07:58 PM
rdauenhauer :wttc:
& Search is your friend. Jun 20 2018, 09:43 PM Rand
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2.0 and 1.7 are always ... Jun 25 2018, 12:30 PM dr914@autoatlanta.com those are not the problem, I would say that. your ... Jun 25 2018, 12:31 PM |
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