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SVTPerformance's Chain of Restaurants
The Blower Bistro
Can a bad fuel filter cause hesitation/low boost
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<blockquote data-quote="01yellercobra" data-source="post: 16117369" data-attributes="member: 35549"><p>If you're not getting it warmed up and driven it'll leave a weird residue on the oil cap and PCV. It's one of the reasons people say don't just start the car and let it idle. It'll never get hot enough to burn all that crap off. </p><p></p><p>Might be worth doing a leak down on the two that initially were low. That's kind of weird that they started off low and then came up. That would make me think something is hanging. </p><p></p><p>I hope you're running a BAP with that stock pump. There's no way a stock Mach pump will keep up with boost. IMO it's best to monitor a returnless system by datalogging the PIDs pressure drop across the injectors and fuel pump duty cycle. Watching a gauge is hard as the pressure is constantly changing. </p><p></p><p>The reason I asked about when the tune was done is because sometimes when the weather is at one extreme things will get overlooked. Such as if the car is tuned in the summer chances are the cold start tables aren't really messed with it. But come cold weather when those tables are needed things will start acting up. </p><p></p><p>I calibrate gauges for a living. I've seen worse.</p></blockquote><p></p>
[QUOTE="01yellercobra, post: 16117369, member: 35549"] If you're not getting it warmed up and driven it'll leave a weird residue on the oil cap and PCV. It's one of the reasons people say don't just start the car and let it idle. It'll never get hot enough to burn all that crap off. Might be worth doing a leak down on the two that initially were low. That's kind of weird that they started off low and then came up. That would make me think something is hanging. I hope you're running a BAP with that stock pump. There's no way a stock Mach pump will keep up with boost. IMO it's best to monitor a returnless system by datalogging the PIDs pressure drop across the injectors and fuel pump duty cycle. Watching a gauge is hard as the pressure is constantly changing. The reason I asked about when the tune was done is because sometimes when the weather is at one extreme things will get overlooked. Such as if the car is tuned in the summer chances are the cold start tables aren't really messed with it. But come cold weather when those tables are needed things will start acting up. I calibrate gauges for a living. I've seen worse. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Blower Bistro
Can a bad fuel filter cause hesitation/low boost
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