Intermittent Problem with Betty's car, I am at my wit's end on this one. |
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Intermittent Problem with Betty's car, I am at my wit's end on this one. |
ClayPerrine |
Dec 22 2014, 07:17 PM
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#1
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Life's been good to me so far..... Group: Admin Posts: 15,519 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
About 2 weeks ago, Betty came home and said her 74, 1.8L Ljet 914 was intermittently cutting out. I took it out to test drive it, and sure enough, it will randomly cut out. Sometimes mildly, sometimes it feels like the engine shuts off completely, then turns back on.
So I started troubleshooting. Nope, grounds for the injectors are fine. Put the LM-1 in the tailpipe and had her drive it. Every time it cuts out, the LM-1 shows it going lean. I put an L-Jet tester I have on it and ran through all the tests and it shows as working fine. I had it running in the garage, and I went through a "wiggle test", wiggling every wire and connection on the engine. Nothing I do can replicate the issue in the garage. So I started throwing parts at it. To date I have replaced: The air flow meter. The fuel injection wiring harness. The double relay. The dropping resistors. The fuel pump. The ECU. The CHT. The whole distributor with a different pertronix, and tried points too. Nothing I have done to date helps. So I am hoping the collective knowledge of this place will help. I have checked all the simple stuff already. This is going to be hard to fix, whatever it is. I am now to the (IMG:style_emoticons/default/WTF.gif) stage, and looking for suggestions. |
ejm |
Dec 28 2014, 07:39 PM
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#2
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I can see the light at the end of the tunnel Group: Members Posts: 2,694 Joined: 3-February 03 From: Massachusetts Member No.: 224 Region Association: None |
Since the problem is related to the charging system I would swap in another regulator before pulling the alternator. Why did you change the alternator to begin with?
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ClayPerrine |
Dec 28 2014, 08:17 PM
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#3
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Life's been good to me so far..... Group: Admin Posts: 15,519 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
Since the problem is related to the charging system I would swap in another regulator before pulling the alternator. Why did you change the alternator to begin with? I changed the alternator because it stopped charging. Before I changed it, I did a full field test on the old one. It would not charge even then. Fro those that don't know, you can jump battery positive power to the field wire on the alternator. That will cause the alternator to charge max output. Don't do it for long, because you will burn up the battery. But it is a good test to see if you have a bad regulator or a bad alternator. Thanks to everyone who offered suggestions on this. I appreciate the help. (IMG:style_emoticons/default/smilie_pokal.gif) |
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