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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: 16115772" data-attributes="member: 35549"><p>You've still got a few steps before deciding to pull the engine. Are you still running PCV set up? If so that could cause the oil in the tailpipes. Especially if you don't have a catch can. What plugs are you running? How confident are you in the boost gauge you bought? Plus if you really are only seeing 4psi when you're supposed to be getting 8psi it's running pig rich. The ECU doesn't know it's only seeing 4psi so it's fueling the engine like there's 8psi. That's going to leave black residue in the tail pipes. </p><p></p><p>What is the full set up? What MAF, pumps, injectors, etc. The more details the better we can help. </p><p></p><p>If it were me I'd start with a compression test and see what that shows. If it's low then move on to a leakdown. Or start with the leakdown test. If something is bad then you'll know it. If the leakdown comes back good it's time to start looking elsewhere. </p><p></p><p>When the car was tuned was the weather warmer and then you started having issues when it turned cold?</p></blockquote><p></p>
[QUOTE="01yellercobra, post: 16115772, member: 35549"] You've still got a few steps before deciding to pull the engine. Are you still running PCV set up? If so that could cause the oil in the tailpipes. Especially if you don't have a catch can. What plugs are you running? How confident are you in the boost gauge you bought? Plus if you really are only seeing 4psi when you're supposed to be getting 8psi it's running pig rich. The ECU doesn't know it's only seeing 4psi so it's fueling the engine like there's 8psi. That's going to leave black residue in the tail pipes. What is the full set up? What MAF, pumps, injectors, etc. The more details the better we can help. If it were me I'd start with a compression test and see what that shows. If it's low then move on to a leakdown. Or start with the leakdown test. If something is bad then you'll know it. If the leakdown comes back good it's time to start looking elsewhere. When the car was tuned was the weather warmer and then you started having issues when it turned cold? [/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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