 CPU Overhaul |
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| kpax914 |
 Sep 10 2014, 01:20 AM
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#1
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Newbie  Group: Members Posts: 9 Joined: 10-July 14 From: Santee, CA Member No.: 17,610 Region Association: Southern California  |
I have a 73, 1.7 liter with everything new or checks out OK on the Fuel Injection. One culprit left the CPU. I'm in El Cajon Area of San Diego. Any rebuilders, besides sending to PelicanParts?
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Replies
| Dave_Darling |
Oct 6 2014, 12:17 PM
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#2
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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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I have seen two failure modes so far from the ECU.
#1: The fuel pump switching circuit got flaky, and the pump would sometimes not run. #2: An output transistor failed, causing the injectors to stay open. Impromptu CIS! And flooding--and a hydro-locked motor, actually. Both of those were on the same ECU. --DD |
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| dknechtly |
Oct 6 2014, 01:02 PM
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#3
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Yellow 914 Group: Members Posts: 68 Joined: 11-April 03 From: Wylie, TX Member No.: 560 Region Association: None |
I've had the same issue with the fuel pump not turning on.
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Posts in this topic
kpax914 CPU Overhaul Sep 10 2014, 01:20 AM
76-914 Are you sure? Those are pretty much bullet proof i... Sep 10 2014, 08:09 AM
kpax914
Are you sure? Those are pretty much bullet proof ... Oct 5 2014, 08:17 PM
JamesM
...I have exhausted everything else that could be... Oct 6 2014, 10:53 PM Chris Pincetich
If it starts and runs on all 4, but just runs bad... Oct 7 2014, 01:49 PM kpax914
...I have exhausted everything else that could b... Oct 7 2014, 06:14 PM SirAndy Are you sure? Those are pretty much bullet proof i... Oct 6 2014, 01:23 AM boxsterfan Have you read this site?
http://members.rennlist.... Sep 10 2014, 09:14 AM Cap'n Krusty That story is a bit suspect. In the 40 plus years... Oct 5 2014, 09:41 PM Tom If it is running poorly at idle and more throttle ... Oct 6 2014, 12:41 AM stugray
Anyway I hooked up the 2 CPUs and same dproblem w... Oct 6 2014, 08:19 AM pilothyer I think you nailed your problem in your post #4 wh... Oct 6 2014, 08:35 AM 76-914 I have a spare MPS also if you want to check that.... Oct 6 2014, 08:40 AM Johny Blackstain I seem to remember the ECU could also go bad if su... Oct 6 2014, 12:20 PM Drums66 .....It does happen!(CPU failure)but............. Oct 6 2014, 01:15 PM Jacob What do you see when you hook up the vacuum gauge?... Oct 6 2014, 01:46 PM Chris Pincetich I just replaced an ECU for my 1972 914 1.7 with D-... Oct 6 2014, 04:33 PM worn
I just replaced an ECU for my 1972 914 1.7 with D... Oct 6 2014, 08:50 PM kpax914 Hello everybody:
It wasn't the CPU! But a ... Nov 12 2014, 12:31 AM type47
[color=#FF0000]??
But a combo of vacuum leak a... Nov 12 2014, 09:03 AM Racer Chris
[color=#FF0000]??
But a combo of vacuum leak ... Nov 12 2014, 09:09 AM type47
cold start injector mounted on the plenum
OK, co... Nov 12 2014, 09:23 AM 76-914 AA, There across the country. West coasters usuall... Nov 12 2014, 08:29 AM kpax914
AA, There across the country. West coasters usual... Nov 13 2014, 05:31 PM |
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