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The Terminator
Engine/Tuning
Car stumbles under WOT at 4200-4500 rpms. I'm stumped....
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<blockquote data-quote="jwm3786" data-source="post: 11753638" data-attributes="member: 123172"><p>Ok my car consistently falls flat on its face under wot at 4200-4500 rpms. It almost makes a backfire type noise but no black smoke. I've done several things I'll explain what I've done and my setup.</p><p></p><p>I have an 03 cobra with a whipple 2.3 with 2.75 pulley, fore fuel system (rails, hat, 2 gt pumps, push lock hose) dual fpdm setup an a tune by Mcnews automotive. </p><p></p><p>Started after I did the initial upgrades of the fuel system, I have tr7ix plugs gapped at .032 I believe. I took I back to the tuner and they said it wasn't the tune, we will see I guess. I data logged a little and saw that when this happens I lose all fuel pressure. We rechecked all the connections to the pump and re soldered them to be sure. I ran a new frps to see if that was it and although the old one seemed fine, it still did the same thing with the new one. I've tried smaller gaps on the plugs, no success. </p><p></p><p>So I'm wondering if anyone has experience this or has an idea of what else to check? I'm stumped.</p></blockquote><p></p>
[QUOTE="jwm3786, post: 11753638, member: 123172"] Ok my car consistently falls flat on its face under wot at 4200-4500 rpms. It almost makes a backfire type noise but no black smoke. I've done several things I'll explain what I've done and my setup. I have an 03 cobra with a whipple 2.3 with 2.75 pulley, fore fuel system (rails, hat, 2 gt pumps, push lock hose) dual fpdm setup an a tune by Mcnews automotive. Started after I did the initial upgrades of the fuel system, I have tr7ix plugs gapped at .032 I believe. I took I back to the tuner and they said it wasn't the tune, we will see I guess. I data logged a little and saw that when this happens I lose all fuel pressure. We rechecked all the connections to the pump and re soldered them to be sure. I ran a new frps to see if that was it and although the old one seemed fine, it still did the same thing with the new one. I've tried smaller gaps on the plugs, no success. So I'm wondering if anyone has experience this or has an idea of what else to check? I'm stumped. [/QUOTE]
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Car stumbles under WOT at 4200-4500 rpms. I'm stumped....
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