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Engine shuts off randomly during driving.
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<blockquote data-quote="soulfly" data-source="post: 2475693" data-attributes="member: 1798"><p>car: Civic EF</p><p>engine: B16A swap (OBD-0)</p><p></p><p>Here's the story.</p><p></p><p>About 2 months back I had swapped the cams to bigV cams (got them real cheap, but that's not the story). Also changed the sparkplugs to NGK Iridium (2nd hand and cheap, but condition looks good). Everything ran just fine, until one or two days later, I was driving normally. After about 7-8 minutes of driving the engine suddenly shuts off. ECU throws out error code #15 (ignition output signal). The engine won't restart. It could crank, electric was fine, but the engine just wont fire. I have to wait about 1-2 minutes, only then it could start like problem never happened.</p><p></p><p>I reset the ecu by taking off the battery (-) terminal. The error code on the ECU disappears, until the engine decides to shuts off again.</p><p></p><p>I have replaced the ignition coil, but it did not do justice.</p><p></p><p>Then according to my mechanic, it could be relay problem. I have replaced the main relay with an EG main relay (grey colour). Problem seems to be gone, for about two weeks plus.</p><p></p><p>After two weeks, the problem happens again. Same error code, same symptom. Could it be the same main relay faulty again?</p><p></p><p>Some other Honda forums suggested that I check all the grounding connections. All looked fine and locked tight. Only the one near the thermostat seems to look kinda green-ish. </p><p></p><p>Battery seems ok because all the electrical parts are working without problem.</p><p></p><p>Fuel pump is fine. But it seems that fuel economy drops.</p><p></p><p>Last Monday, I have serviced my radiator, replaced the top part (the old one got crack in it). The engine never get overheated, but I guess it's time to fix that one. After that the problem seems to disappear, and I was driving fine on Tuesday. However, today, the engine didn't gave me any chance. It shuts off twice, making me late for my class. <img src="https://zerotohundred.com/forums/styles/default/xenforo/smilies/mad.gif" class="smilie" loading="lazy" alt=":mad:" title="Mad :mad:" data-shortname=":mad:" /> </p><p></p><p>Anybody could look into my problem?</p></blockquote><p></p>
[QUOTE="soulfly, post: 2475693, member: 1798"] car: Civic EF engine: B16A swap (OBD-0) Here's the story. About 2 months back I had swapped the cams to bigV cams (got them real cheap, but that's not the story). Also changed the sparkplugs to NGK Iridium (2nd hand and cheap, but condition looks good). Everything ran just fine, until one or two days later, I was driving normally. After about 7-8 minutes of driving the engine suddenly shuts off. ECU throws out error code #15 (ignition output signal). The engine won't restart. It could crank, electric was fine, but the engine just wont fire. I have to wait about 1-2 minutes, only then it could start like problem never happened. I reset the ecu by taking off the battery (-) terminal. The error code on the ECU disappears, until the engine decides to shuts off again. I have replaced the ignition coil, but it did not do justice. Then according to my mechanic, it could be relay problem. I have replaced the main relay with an EG main relay (grey colour). Problem seems to be gone, for about two weeks plus. After two weeks, the problem happens again. Same error code, same symptom. Could it be the same main relay faulty again? Some other Honda forums suggested that I check all the grounding connections. All looked fine and locked tight. Only the one near the thermostat seems to look kinda green-ish. Battery seems ok because all the electrical parts are working without problem. Fuel pump is fine. But it seems that fuel economy drops. Last Monday, I have serviced my radiator, replaced the top part (the old one got crack in it). The engine never get overheated, but I guess it's time to fix that one. After that the problem seems to disappear, and I was driving fine on Tuesday. However, today, the engine didn't gave me any chance. It shuts off twice, making me late for my class. :mad: Anybody could look into my problem? [/QUOTE]
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Engine shuts off randomly during driving.