JamesP Posted November 21, 2013 Posted November 21, 2013 I've got a ep91 with a td04 turbo set up running at 1bar of boost. When under heavy acceleration I seem to loose a bit of boost. Basically the car hits full boost and the boost gauge reads 1 bar but then drops to 0.8/0.9 and seems to fluctuate between the two very quickly. Feels almost like the cars hitting the limiter but its at around 5-6000 rpm. it doesn't happen all the time seems to happen most when accelerating hard in third gear but then in fourth it will just hold a steady 1 bar. Any help to what the problem could be would be much appreciated. Quote
AdamB Posted November 21, 2013 Posted November 21, 2013 What engine management system you running? Quote
Beastmode panda Posted November 21, 2013 Posted November 21, 2013 Boost leak if it's dropping off. Quote
JamesP Posted November 22, 2013 Author Posted November 22, 2013 What engine management system you running? Greddy e-manage blue. Boost leak if it's dropping off. that's what I was thinking but wouldn't it just drop off and stay low if it was leaking? its weird how it goes back up to 1 bar and down again repeatedly. Quote
Beastmode panda Posted November 22, 2013 Posted November 22, 2013 Oh yeah sorry, I misread what you put about it dropping off. Hmmm, but for piece of mind have you checked for boost leaks? Checked all vac hoses, intercooler hoses, dump valve connections etc? Quote
JamesP Posted November 22, 2013 Author Posted November 22, 2013 not yet, its the first thing I will check when I get chance at the weekend as I haven't had any time to do anything yet. Just I'm not sure its a leak as it goes back up which I thought a leak would just give a constant lower boost pressure. Quote
JamesP Posted November 24, 2013 Author Posted November 24, 2013 Cant find any boost leaks and it seems to hold a steady 1 bar sometimes so cant see how a leak would be intermittent, it would always have a lower boost reading. Not sure what else to check, could it possibly be a dodgy actuator? Quote
Ryan_EP82 GT Posted November 25, 2013 Posted November 25, 2013 weak actuator spring? struggling to hold the high boost? Quote
JamesP Posted November 25, 2013 Author Posted November 25, 2013 that's what i'm wondering, is there any way to test them or is it a case of just fitting a new one and hoping that was the problem? Quote
Ryan_EP82 GT Posted November 28, 2013 Posted November 28, 2013 (edited) Pretty much fitting a new one to find out, any of your mates running tdo4 you could borrow theirs to try andd find out before you spend the money? Edited November 28, 2013 by Ryan_EP82 GT Quote
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