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SVTPerformance's Chain of Restaurants
The Distillery
Return Guys: Fuel Pressure Drop when hot?
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<blockquote data-quote="speeddemon2000" data-source="post: 13710658" data-attributes="member: 14576"><p>I had a similar issue. I found that it was caused by heat. If you let it sit a while the fuel pressure would go back up once the fuel cooled. Then once the fuel heated back up the issue returned. To illustrate this better I had just drove about 50 miles on the highway at around 75 mph. I watched on my gauge as the pressure dropped from the low 40s down to around 29 psi. As soon as I got off the freeway I added 1/2 tank of gas to my tank. If you don't know the gas at the pump is usually pretty cool even in the summer time. If you have every filled up a motorcycle in summer time you will immediately notice how cool the gas tank gets during the fill up. So what did I do to alleviate the issue. I talked to Fore performance and they suggested staging the pumps. I purchase a hobs switch from lsxtune (<a href="http://www.lsxtune.com/shop/product_...roducts_id/576" target="_blank">http://www.lsxtune.com/shop/product_...roducts_id/576</a>). It helped the issue a lot. It didn't completely eliminate the issue but pretty close. The next thing I did was run my fuel system in a dead head configuration. I did not see FP pressure issues after that. </p><p></p><p><img src="http://imageshack.us/a/img401/5883/7kd7.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="speeddemon2000, post: 13710658, member: 14576"] I had a similar issue. I found that it was caused by heat. If you let it sit a while the fuel pressure would go back up once the fuel cooled. Then once the fuel heated back up the issue returned. To illustrate this better I had just drove about 50 miles on the highway at around 75 mph. I watched on my gauge as the pressure dropped from the low 40s down to around 29 psi. As soon as I got off the freeway I added 1/2 tank of gas to my tank. If you don't know the gas at the pump is usually pretty cool even in the summer time. If you have every filled up a motorcycle in summer time you will immediately notice how cool the gas tank gets during the fill up. So what did I do to alleviate the issue. I talked to Fore performance and they suggested staging the pumps. I purchase a hobs switch from lsxtune ([URL="http://www.lsxtune.com/shop/product_...roducts_id/576"]http://www.lsxtune.com/shop/product_...roducts_id/576[/URL]). It helped the issue a lot. It didn't completely eliminate the issue but pretty close. The next thing I did was run my fuel system in a dead head configuration. I did not see FP pressure issues after that. [IMG]http://imageshack.us/a/img401/5883/7kd7.jpg[/IMG] [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
Return Guys: Fuel Pressure Drop when hot?
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