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Jeep Wrangler YJ
YJ General Discussion
Non starting after new thermostat and heater core flush
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<blockquote data-quote="jpjeep26uk" data-source="post: 441548" data-attributes="member: 20690"><p>Hi all, bit of an update to my no spark issue.</p><p>I eventually sent the ECM off to a local PCB / ECM repair place who refurbed it. Not cheap,but at least it would be another item I can eliminate.</p><p>Plugged it in and no joy.BUT!! things have changed.....</p><p></p><p>I now get a powerful and visible spark from the coil lead!</p><p></p><p>I also get a spark on all four plugs, none of which happened before.!!</p><p></p><p>Fuel pump now primes in the on position for about 2 secs!</p><p></p><p>Fuel travels to the filter for about 2 secs!</p><p></p><p>Fuel shoots out of the pipe connected to the Throttle body in the on position!</p><p></p><p>But does not go into the throttle body.</p><p></p><p>What?</p><p></p><p>Sgnificant progress, BUT, what would stop the petrol entering the throttle body and being injected into the valve thing/ engine?</p><p></p><p>We're soooo close to fixing this....throw me some suggestions folks! <img class="smilie smilie--emoji" loading="lazy" alt="😜" title="Winking face with tongue :stuck_out_tongue_winking_eye:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f61c.png" data-shortname=":stuck_out_tongue_winking_eye:" /></p></blockquote><p></p>
[QUOTE="jpjeep26uk, post: 441548, member: 20690"] Hi all, bit of an update to my no spark issue. I eventually sent the ECM off to a local PCB / ECM repair place who refurbed it. Not cheap,but at least it would be another item I can eliminate. Plugged it in and no joy.BUT!! things have changed..... I now get a powerful and visible spark from the coil lead! I also get a spark on all four plugs, none of which happened before.!! Fuel pump now primes in the on position for about 2 secs! Fuel travels to the filter for about 2 secs! Fuel shoots out of the pipe connected to the Throttle body in the on position! But does not go into the throttle body. What? Sgnificant progress, BUT, what would stop the petrol entering the throttle body and being injected into the valve thing/ engine? We're soooo close to fixing this....throw me some suggestions folks! 😜 [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Non starting after new thermostat and heater core flush
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