Fuel cuts when full boost?
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Fuel cuts when full boost?
I think i'm getting fuel cuts when i reach full boost cause it throws me forward when it cuts. What could be causing it? Car is street tuned by John Vega on 16lb. 560 dsm injectors, walbro 255, fpr reads 30psi at idle, aem wideband shows 13-13.8 idle but havent paid attention to it under full boost, t3/t4 .48 .62 turbo. Only cuts under wot full boost, but if i ease on it 80% throttle it doesnt do it.
Last edited by Kid-jdm-teggy; 03-20-2014 at 03:19 PM.
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Re: Fuel cuts when full boost?
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Re: Fuel cuts when full boost?
Ok found the problem. Just did a quick pull and notice my boost level went to 17psi and then it cuts, so I assume i have a faulty wastegate??
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Re: Fuel cuts when full boost?
Just contacted my tuner and he said its built in with the ecu to protect from overboosting. I have a turbo xs wastegate with a dump tube but its on a pos ebay manifold. Dont flame me but could i run a wastegate on the intake side also?
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Re: Fuel cuts when full boost?
No. A properly designed manifold would probably fix your creep issues. See how your wastegate is only on the #1 runner? It should be somewhere that it covers all of the runners. Alternatively, if you're too broke and/or too much of a cheapskate to get a real manifold, turn your boost pressure down. If you're set to 16 and it's creeping to 17, set it to 15 and let it creep to 16. Done.
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Re: Fuel cuts when full boost?
No. A properly designed manifold would probably fix your creep issues. See how your wastegate is only on the #1 runner? It should be somewhere that it covers all of the runners. Alternatively, if you're too broke and/or too much of a cheapskate to get a real manifold, turn your boost pressure down. If you're set to 16 and it's creeping to 17, set it to 15 and let it creep to 16. Done.
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Re: Fuel cuts when full boost?
I dont want to mess with the controller cause its a manual one which is confusing and hard cause its not electronic. I'm just not gonna go full boost until i get a new manifold. I'm looking at this ebay cast manifold with the wastegate port in the middle of all 4 runners, would this be better?
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Re: Fuel cuts when full boost?
I thought a bov doesn't affect boost creep and I know i need a retune but was wondering would the type of manifold with the wastegate port in the middle of all four runners.instead of one help stop the creep?
#23
Re: Fuel cuts when full boost?
check your wg. i was having same issue a while back. end up being wg not opening at full boost pressure, it'll spiked 1-2 psi past boost pressure then cut off. tried a friend's wg and it open at full boost pressure, problem solved.
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Re: Fuel cuts when full boost?