 1973 2.0 ECU, Fuel Injection Problems |
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| t2avlis |
 Oct 14 2008, 11:00 PM
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#1
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Newbie  Group: Members Posts: 3 Joined: 15-September 08 From: Modesto, ca Member No.: 9,550 Region Association: Northern California  |
I am trying to get my 73 2.0 with EFI running. I figured out that I am not getting any power from the ECU to the fuel pump relay. Is there a way to test the ECU? Which pin is the power feed to the ECU? Does anyone in the USA fix these and if so is it a common part that goes out? Is is sometime that a guy with a soder gun could replace?
Thanks for the help. Tony Modesto |
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Replies(1 - 6)
| orange914 |
Oct 14 2008, 11:17 PM
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#2
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
QUOTE(t2avlis @ Oct 14 2008, 10:00 PM)  I am trying to get my 73 2.0 with EFI running. I figured out that I am not getting any power from the ECU to the fuel pump relay. Is there a way to test the ECU? Which pin is the power feed to the ECU? Does anyone in the USA fix these and if so is it a common part that goes out? Is is sometime that a guy with a soder gun could replace? Thanks for the help. Tony Modesto tony (IMG:style_emoticons/default/welcome.png) i've got a good 73 ecu, i'm not sure i want to sell it, but your welcome to hook it up to confirm your diag. strange enough i live in ceres, come on by and talk 914's anytime. 537 3749 mike |
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| Root_Werks |
Oct 15 2008, 08:38 AM
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#3
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Village Idiot Group: Members Posts: 8,667 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest 
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Cool, I would take him up on that offer! I had a 914 years ago that double fired injectors 1&3 I think. I finally found a guy with a good 2.0 brain and we tested that way. Quick and easy.
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| Cap'n Krusty |
Oct 15 2008, 10:39 AM
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#4
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
ECU failures are VERY rare. The Cap'n
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| 914Sixer |
Oct 15 2008, 02:47 PM
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#5
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914 Guru Group: Members Posts: 9,122 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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35 yr old wiring harness are prone to be toasted. High joints under the sheath are not uncommon. Check continutiy of each wire in the harness.
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| Dave_Darling |
Oct 15 2008, 09:34 PM
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#6
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914 Idiot Group: Members Posts: 15,161 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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Brad Anders has some troubleshooting flowcharts for the fuel pump control system on his D-jet website:
http://members.rennlist.com/pbanders --DD |
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| swl |
Oct 16 2008, 08:23 PM
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#7
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Senior Member Group: Members Posts: 1,409 Joined: 7-August 05 From: Kingston,On,Canada Member No.: 4,550 Region Association: Canada |
Is there something specific that makesyou suspect the ECU? ECU failures are pretty much the lowest probablity for fuel pump problems. All it is doing is closing a switch to ground. The two relays and fuse are the prime suspects. Wiring harness next on the list. Search on fuel pump - lots of good threads there.
Quick check to tell if the ecu is the problem. Remove the 4 pin connector on the back left of the relay board. Jump pin 3 to ground. Turn the key on. If the pump runs then your ecu or the harness to it is suspect. If it doesn't run then look on the relay board for problems. |
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