I have a td05h 20g @17psi and the mods are in my sig, I have a dejon mbc and it is attached to one of the fan bolts. I was installing some silicone hoses yesterday on my lower intercooler pipe and now I started spiking to 20psi then settling back down to 17psi. Where usually I would hold 17psi steady to redline, just wondering if a boost leak would cause a spike? Thanks.
Boost leak = Boost spike?
fliprsx02
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I have a td05h 20g @17psi and the mods are in my sig, I have a dejon mbc and it is attached to one of the fan bolts. I was installing some silicone hoses yesterday on my lower intercooler pipe and now I started spiking to 20psi then settling back down to 17psi. Where usually I would hold 17psi steady to redline, just wondering if a boost leak would cause a spike? Thanks.
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It never hurts to do a boost leak test.
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Have you done a boost leak test?
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I don't think I'll have time to do a boost leak test today, right now, I'm at school typing this, and then I'm busy after so I guess I'll try tonight or tomorrow. I'll let you guys know once I get it done. But is it even possible for a boost leak to cause a spike?
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fliprsx02 said:
Yes it can, I'v had that happen to me once.
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It was alittle left above the turbo.
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Get those leaks fixed!
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Fixed both leaks and it still did not seem to fix the spike. Today I adjusted my wastegate arm one turn looser hoping it would fix the spike but it is still there. Something is weird with my boost, it would hit 17-18psi @3500rpm, then drop to 15psi, then it would rise to 16-17psi @5000rpm to redline. So I think I have boost spike and boost creep? I am getting so tired of this stupid problem and its making it hard for me to tune it.
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Are you using soapy water when your doing your boost leak tests?
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fliprsx02 said:
Just spray the shit out of all your vacuum lines, UICP,LICP, Injectors. It took me atleast 15-20 times doing a boost leak test to get all of mine, and i'm still only about 95% sure I'v got them all.
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Ok, got done with the boost leak test and still no leaks what so ever. Sprayed the whole tb, intake manifold, intercooler couplings, bov, turbo, vacuum lines and still no leaks. My leak tester popped off which scared the crap out of me, loud ass POP, haha. So now I am totally stumped on my problem. And thanks for the help Boost92AWD.
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Have you just recently turned up the boost more and noticed this happening? Why were you installing hoses to your LICP?
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No, I usually kept it at 17psi and it would spike, then I shortened my mbc hoses and got rid of the spike. I installed the hoses because I had fernco hoses on and I changed to t-bolt clamps, thats when the spike came back again.
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Thats all that you messed with was the LICP, when your spiking came back?
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