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SVTPerformance's Chain of Restaurants
Tuning À la carte
Tuning out hot start issues
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<blockquote data-quote="SnakeBoostE85" data-source="post: 15383667" data-attributes="member: 160175"><p>so I have a exchanged a few PM's with 04sleeper. He said that you shouldn't have any issues with hot starts on E85. If you do, its not a tuning issue. Only cold start problems can be solved in your tune, by adding fuel. He felt any hot start issues on E85 is purely mechanical. I have another PM into him asking him about his recommended fuel system configuration on E85. </p><p></p><p>So as one guy suggested above, the fact that most regulators don't hold pressure after the prime could perhaps add to the problem with the fuel boiling without pressure being held. </p><p></p><p>Another thing - I know myself and several others wired our return fuel pumps into the FPDM so that the pump primes like stock and is hooked into the enertia switch. If you don't wire it through the FPDM, it will run full time with key on which would almost certainly solve the problem on a fully circulating fuel system going through the rails because your going to push tons of fresh fuel through the rails, while it may be hot it won't be boiling like the fuel is sitting in the rails. </p><p></p><p>I asked 04sleeper what his configuration is, I have not heard back yet. This prime configuration could be the difference. Is anyone bypassing the FPDM and priming full time with key on and still having issues? </p><p></p><p>One thing I noticed on my Powerstroke is that it I believe it has a very similar setup with a return fuel system, when I turn the key on, I hear the fuel pump running full time, it does not prime.</p><p></p><p>The only reason I wanted it wired into the FPDM is so that the enertia switch is in the loop just in case of an accident, the fuel pump is shut off. Other than that, I could care less if the pump runs all the time with the key on.</p></blockquote><p></p>
[QUOTE="SnakeBoostE85, post: 15383667, member: 160175"] so I have a exchanged a few PM's with 04sleeper. He said that you shouldn't have any issues with hot starts on E85. If you do, its not a tuning issue. Only cold start problems can be solved in your tune, by adding fuel. He felt any hot start issues on E85 is purely mechanical. I have another PM into him asking him about his recommended fuel system configuration on E85. So as one guy suggested above, the fact that most regulators don't hold pressure after the prime could perhaps add to the problem with the fuel boiling without pressure being held. Another thing - I know myself and several others wired our return fuel pumps into the FPDM so that the pump primes like stock and is hooked into the enertia switch. If you don't wire it through the FPDM, it will run full time with key on which would almost certainly solve the problem on a fully circulating fuel system going through the rails because your going to push tons of fresh fuel through the rails, while it may be hot it won't be boiling like the fuel is sitting in the rails. I asked 04sleeper what his configuration is, I have not heard back yet. This prime configuration could be the difference. Is anyone bypassing the FPDM and priming full time with key on and still having issues? One thing I noticed on my Powerstroke is that it I believe it has a very similar setup with a return fuel system, when I turn the key on, I hear the fuel pump running full time, it does not prime. The only reason I wanted it wired into the FPDM is so that the enertia switch is in the loop just in case of an accident, the fuel pump is shut off. Other than that, I could care less if the pump runs all the time with the key on. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Tuning À la carte
Tuning out hot start issues
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