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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: 15373627" data-attributes="member: 160175"><p>Alright this is driving me nuts... I've tried lots of things and nothing seems to help and if anything it gets worse. Here's the deal... if the car is heat soaked on a hot day and lets say you park it for 5 minutes to run into the store, come back out and try to restart it, its a bitch. It eventually starts, but it takes about 2-3 tries. What I have found is that priming it about 2-3 times without attempting to start it, seems to make the most difference. When I'm priming it several times, I'm probably cooling down the runners and cylinders with fuel making it easier to fire or perhaps I am just circulating more cooler fuel through the rails. Obviously the fuel under pressure sitting in the rails is reaching 230+ degrees when its sitting there. So perhaps that circulation of fresh fuel at a cooler temp allows it to start easier...</p><p></p><p>So having said that, what can I do with my tune to help this? I know some guys bypass the FPDM with return fuel systems and have the pump run full time at key on... I didn't want to do that because it bypasses your enertia switch in case of an accident or rollover. There is also no way to lengthen the prime in the tune. </p><p></p><p>Any ideas, please... And if you have an idea of what to do using PRP, PLEASE, say EXACTLY which table to edit... A few guys above just throw half cocked suggestions out like... oh "add air" or "add fuel"... Lets try to be more specific on that. There is the IAC table, air charge, crank lamba, enleanment, enrichment... please be specific. </p><p></p><p>also take screen shots of your tables if possible!! Thanks.</p></blockquote><p></p>
[QUOTE="SnakeBoostE85, post: 15373627, member: 160175"] Alright this is driving me nuts... I've tried lots of things and nothing seems to help and if anything it gets worse. Here's the deal... if the car is heat soaked on a hot day and lets say you park it for 5 minutes to run into the store, come back out and try to restart it, its a bitch. It eventually starts, but it takes about 2-3 tries. What I have found is that priming it about 2-3 times without attempting to start it, seems to make the most difference. When I'm priming it several times, I'm probably cooling down the runners and cylinders with fuel making it easier to fire or perhaps I am just circulating more cooler fuel through the rails. Obviously the fuel under pressure sitting in the rails is reaching 230+ degrees when its sitting there. So perhaps that circulation of fresh fuel at a cooler temp allows it to start easier... So having said that, what can I do with my tune to help this? I know some guys bypass the FPDM with return fuel systems and have the pump run full time at key on... I didn't want to do that because it bypasses your enertia switch in case of an accident or rollover. There is also no way to lengthen the prime in the tune. Any ideas, please... And if you have an idea of what to do using PRP, PLEASE, say EXACTLY which table to edit... A few guys above just throw half cocked suggestions out like... oh "add air" or "add fuel"... Lets try to be more specific on that. There is the IAC table, air charge, crank lamba, enleanment, enrichment... please be specific. also take screen shots of your tables if possible!! Thanks. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Tuning À la carte
Tuning out hot start issues
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