Magic Loss of boost out of nowhere!
#1
Pistons, WTF is that!
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Magic Loss of boost out of nowhere!
I know that this topic has probably been beaten to death on the forums already, but after reading about 30 other boost problem threads and running through about 38 hours of trouble-shooting on my problem with no fix thus far (for better or worse) I have to call in for help.
Basically here is the problem...Was racing through the mountains one night and noticed that the car sounded funny. It drove fine, but there was a lack of power, so I noticed that I had no boost all the sudden. Gauge reads at about a steady .4 bar in all RPM ranges from 3000-redline. There is a distinct rushing air sound like all my boost is being vented out. I suspected a blown line or something, but after tearing the car apart and inspecting all the lines and such, I haven't discovered anything broken or cracked/split. I did adjust and tighten some claps thinking that was the prob, but no change. The boost pattern test gets me 5 5 5 5 pretty much across the board. I pulled the connectors on the WG and Pre-Control solenoids trying to see if I could get at least 7psi out of the car, thinking that it might be and ECU problem, but no good, still only made maybe 5psi. I've switched the ABV and CRV thinking that It might have been one of the two leaking pressure, no change.
The car is a 92 FD3S Efini edition, running stock twins, only relevant mods might be the the Apexi intake, and full 3" turbo-back exhaust, the secondary throttle control has been removed also, everything else is pretty much a stock turbo system.
I'm becoming very frustrated with this...please help!
Basically here is the problem...Was racing through the mountains one night and noticed that the car sounded funny. It drove fine, but there was a lack of power, so I noticed that I had no boost all the sudden. Gauge reads at about a steady .4 bar in all RPM ranges from 3000-redline. There is a distinct rushing air sound like all my boost is being vented out. I suspected a blown line or something, but after tearing the car apart and inspecting all the lines and such, I haven't discovered anything broken or cracked/split. I did adjust and tighten some claps thinking that was the prob, but no change. The boost pattern test gets me 5 5 5 5 pretty much across the board. I pulled the connectors on the WG and Pre-Control solenoids trying to see if I could get at least 7psi out of the car, thinking that it might be and ECU problem, but no good, still only made maybe 5psi. I've switched the ABV and CRV thinking that It might have been one of the two leaking pressure, no change.
The car is a 92 FD3S Efini edition, running stock twins, only relevant mods might be the the Apexi intake, and full 3" turbo-back exhaust, the secondary throttle control has been removed also, everything else is pretty much a stock turbo system.
I'm becoming very frustrated with this...please help!
#3
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Have you looked at the CCA/CCV? Check all the lines there as well as your 1 way check valves to ensure they work correctly. If the CCA/CCV is sticking it can vent your boost out the CRV.
The primary turbo has to be working first, so concentrate troubleshooting in that area.
Here's a good link to a turbo troubleshooting site: http://se3p.com/index.php?title=FD3S...roubleshooting
Edit: Get a Mityvac silverline plus...invaluable for turbo troubleshooting
The primary turbo has to be working first, so concentrate troubleshooting in that area.
Here's a good link to a turbo troubleshooting site: http://se3p.com/index.php?title=FD3S...roubleshooting
Edit: Get a Mityvac silverline plus...invaluable for turbo troubleshooting
Last edited by twinsinside; 11-28-09 at 06:34 AM. Reason: addendum
#7
Pistons, WTF is that!
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Okay, after much deliberation, I broke down and ripped every freaking hose out for the 5th time and went over all of them with a fine tooth comb and a magnifying glass and found a split Y-Pipe coupler (good troubleshoot adam c!) and a few lines that had hairline splits that you cant see unless you physically raped the hoses. I'm currently waiting on parts to replace them all, so I'll keep you all up to date as if it fixes the problem or not. Thanx for the help guys!
Last edited by KCKrogoth; 11-28-09 at 08:58 AM.
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#9
Pistons, WTF is that!
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Looks as if the split coupler was the problem! Hell yeah! Got my boost back to standards! Thanx for the help all!I think it's time I just trash all that stupid factory hosing anyway and get aluminum piping.
Both my intakes fit good, I'm using the stock rubber hoses that came with the car for the intakes, it's just the filters and their respective holders that are aftermarket so the hoses fit like factory where they mount up to the turbos themselves...if that answers your question.
Both my intakes fit good, I'm using the stock rubber hoses that came with the car for the intakes, it's just the filters and their respective holders that are aftermarket so the hoses fit like factory where they mount up to the turbos themselves...if that answers your question.
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