figures i realize the problem now...

[1fstavant]

well just to let everyone know, im pretty sure i figured out what royally fd my motor...
a clogged fuel filter, even tho i had tested the fuel pressure im beliving this was my root cause

reasons why i believe this:
when i first changed my filter the first time boosting it it held 11.1 and then it started doing the lean thing again, and i had little like plastic shavings (almost like a flakey/leafy things) in my tank

so im thinkin that caused me to run lean up top and ideally i should have had my tank droped and cleaned and i probably still would be boosting today

[end brain storm]
john

a little too late i guess

[Jibberific]

wow, so much trouble from such a cheap minor part.. sucks man

[biketsai]

Hmm, maybe I should change mine out. Do you think it will make me boost sooner? (pre-5200)

[Jibberific]

do you seriously not boost until 5200?? i dont think thats good.

[biketsai]

do you seriously not boost until 5200?? i dont think thats good.

Well I don't hit full boost until then

[Don Supreme]

Well I don't hit full boost until then

That doesn't sound right @ all --- PES should be full spooled before 4k --

My 35r is full over 20 PSI before 5k........still 1.8

[biketsai]

That doesn't sound right @ all --- PES should be full spooled before 4k --

My 35r is full over 20 PSI before 5k........still 1.8

I think it's the tune. I can't think of anything else it could possibly be. Unless you think something like a fuel filter might cause this.
PS: this is on the new Pes tune

[Don Supreme]

Could be tons of things....


-- Bad engine compression
-- Boost leak (hopefully you have done a pressure test)
-- restrictive exhaust.
-- Pre-turbo exhaust leak.

[sean1.8t]

I think it's the tune. I can't think of anything else it could possibly be. Unless you think something like a fuel filter might cause this.
PS: this is on the new Pes tune

what gear are you gauging this on?

the less the load on the engine(lower gears) will result in a higher boost threshold.

if you can get your trans to run from 2000k rpms to redline in 3rd gear only, then you will probably get different results

[Poopie]

I don't think its the tune. did you check the waste gate? I believe the ecu doesn't open the wastegate till it reaches its desired boost level or air speed density if you are running a maf

[biketsai]

I don't think its the tune. did you check the waste gate? I believe the ecu doesn't open the wastegate till it reaches its desired boost level or air speed density if you are running a maf

It is internally gated.

[Poopie]

It is internally gated.

i know. internal or external, its function is the same.

[biketsai]

Could be tons of things....


-- Bad engine compression Havent done a test yet
-- Boost leak (hopefully you have done a pressure test) have tested it from the TIP, and visually
-- restrictive exhaust. I have a testpipe/2.5"APR
-- Pre-turbo exhaust leak.What could that be?

quoted from above

[biketsai]

what gear are you gauging this on?

the less the load on the engine(lower gears) will result in a higher boost threshold.

if you can get your trans to run from 2000k rpms to redline in 3rd gear only, then you will probably get different results

I have been guaging all of this (hitting full boost at 5200) during 3rd gear runs from 2500-6500 WOT

i know. internal or external, its function is the same.

Sorry to thread jack 1fstavant, if youd like me to, I will make another thread , please let me know.

I mean, how would I check that then?

Here is an old log of my 115 block readings

[sean1.8t]

quoted from above

What could that be?

a leak in your exhaust before it hits the turbine wheel of the turbo.

which will be in 1 of 4 places since you are internally gated.

1- the turbo>manifold gasket/seal. check to make sure that all of the bolts are tight, and if you are running a gasket between the 2, then make sure the gasket is not blown. i suggest not running a gasket.

2- the manifold>head gasket. make sure that all of your manifold nuts are tight, and you don't have a blown gasket. you need a gasket here.

3- your turbine housing is bolted tight to the center cartrige or the turbo. there should be about 6 bolts holding that on. so check those.

and lastly, a crack in your manifold. visually check the manifold, then with the car idling, feel your hand around the manifold and all 3 spots mentioned above to see if you feel any air pulsing/leaking out. i find it's easiest to do this on a cold(1200rpm) start up VS a regular 800rpm idle.

but i highly doubt this is your problem, cause if you aren't hitting full boost til 5+k rpms, then you would hear that exhaust leak driving the car with thte windows down.. after you do this, and if you have no results, then do a compression test

[mike-2ptzero]

He is not the first person to have a problem with the tune he has in his car. Someone else right near PES had issues with the tune and could not get PES to do anything about it without spending way more money, that person jumped ship and got a different tune.


I have been over all of these things with him for the last few months. To make it hit full spool by 5200 instead of 3400 where it should there would have to be a pretty big size exhaust leak or he would need to be running on 3 cylinders and neither of those are a problem.