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04 turbo falls flat past 2500rpm and bucks

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Old 02-07-2012, 09:17 PM
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CalvinC4S
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Default 04 turbo falls flat past 2500rpm and bucks

Anyone have this happen? runs as it should until boost starts rolling in. Zero power and an extreme bucking.

Check engine light came on..

I limped home, I suspect I blew a hose off a turbo?

Anyone have experience with something like this that can point me in a direction?
Old 02-08-2012, 09:38 PM
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CalvinC4S
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Checked all the high pressure lines from the turbos all the way to the Y tube before the TB.
Nothing... I'm stumped.

Would a bad MAF cause zero throttle response/sputter and violent bucking?

Idle is smooth as ever, just a tad high??
Old 02-09-2012, 01:21 AM
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mcbit
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I had very similar with fuel pumps but no CEL.
Old 02-10-2012, 06:25 PM
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I checked every high pressure side hose to the "Y" pipe from the turbos, everything looked good.

Pulled the MAF's and cleaned them.

checked it over with the MAF's disconnected in open loop.

Hooked a fuel pressure gauge up and I loose pressure after the secondary pump shuts down.

I will be replacing the drivers side fuel pump...
Felt just like a boost hose coming of..
Old 02-11-2012, 04:04 AM
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Hope it goes well for you.
Old 02-12-2012, 12:54 PM
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That was not fun, but it fixed the issue. Runs better then ever.
Didn't even know it had two fuel pumps till a couple days ago.
It even has two batterys.

Old 02-12-2012, 12:58 PM
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Are all the cigarettes there just for show?
Old 02-12-2012, 01:04 PM
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haha yeah, the joke doesn't translate well in the photo. You almost need to be there the fuel smell was intoxicating.

Just before the pump went out I filled the tank

I had two 5 gallon fuel jugs to off load most of the left side but was up to my elbow on the right side of the tank.
Nasty nasty job.

I finished around 5pm yesterday and we had planned on grilling chicken, needless to say we ordered pizza.

We have a tankless gas operated inline water heater in the garage. No one was allowed to touch the water for 2 hours.



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