 ECU, How to test? |
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| 74ravenna |
 Mar 15 2016, 06:41 AM
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#1
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Member  Group: Members Posts: 471 Joined: 19-October 14 From: nh Member No.: 18,032 Region Association: North East States 
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What the best (easiest) way to test the computer to see if its any good?
I have a 74 1.8. Thanks. |
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| BeatNavy |
Mar 15 2016, 06:46 AM
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#2
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Certified Professional Scapegoat Group: Members Posts: 2,924 Joined: 26-February 14 From: Easton, MD Member No.: 17,042 Region Association: MidAtlantic Region
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Road test it (in a car) or use one of those diagnostic machines if you can find one. I don't think there's an easy or simple way to verify ECU function, but I could be wrong. I have been before.
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| jim_hoyland |
Mar 15 2016, 07:05 AM
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#3
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Get that VIN ? Group: Members Posts: 9,306 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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There is a thread explaining some bench tests you can do with a multi-meter; otherwise, see how it works in the car. From my experience, these rarely fail unless they are subjected to flooding or other trauma
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| mepstein |
Mar 15 2016, 08:19 AM
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#4
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914-6 GT in waiting Group: Members Posts: 19,280 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
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QUOTE(74ravenna @ Mar 15 2016, 08:41 AM)  What the best (easiest) way to test the computer to see if its any good? I have a 74 1.8. Thanks. Put it on a good running car. That's how we test our 3.2 ecu's. |
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| JeffBowlsby |
Mar 15 2016, 09:28 AM
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#5
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914 Wiring Harnesses Group: Members Posts: 8,511 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
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I have an EFI Associates tester that checks the various L-Jet ECU functions, but it interposes with the FI harness and requires the entire FI system including the ECU, sensors and injectors be checked at the same .
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