sick issues under boost ... AAARRRGH (3rd UPDATE !!!)

[dirtdemon]

took my ty out for a walkie and ... when it passes 5 psi pressure the probs occur :

feels a little like overboost - but @ 5psi :werd: ???
power goes down, boost doesn't increase - when i let off gas , everythings fine again - unit it sees another + 5psi ...

- no codes
- no check engine
- starts fine (like ever)

btw.: truck feels really good and easy until 5 psi ...

... what could have happend ???

any advices are welcome,
pat.

i'm really nuts and confused - please help me out and :repost: *sniff*

 

[NecroWolf]

Re: sick issues under boost ... please help AAARRRGH

Re: sick issues under boost ... please help AAARRRGH

boost leak maybe?

 

[dirtdemon]

Re: sick issues under boost ... please help AAARRRGH

Re: sick issues under boost ... please help AAARRRGH

please explain that to me - where could that be ???

boostcontrol is not a possibility ?

 

[RSpengler]

Re: sick issues under boost ... please help AAARRRGH

Re: sick issues under boost ... please help AAARRRGH

A boost leak would have to be somewhere between the turbo and the intake... Did your wastegate flapper come disconnected? Pull your intake and see if your turbo spins freely, maybe its siezing up on you...
-Rob

 

[ZavzTy547]

Re: sick issues under boost ... please help AAARRRGH

Re: sick issues under boost ... please help AAARRRGH

A boost leak would have to be somewhere between the turbo and the intake... Did your wastegate flapper come disconnected? Pull your intake and see if your turbo spins freely, maybe its siezing up on you...
-Rob

May want to check your fuel pressure to see if it raises with boost. If it doesn't then you need a new FP.

 

[dirtdemon]

Re: sick issues under boost ... please help AAARRRGH

Re: sick issues under boost ... please help AAARRRGH

May want to check your fuel pressure to see if it raises with boost. If it doesn't then you need a new FP.

great hint ! - fueltank + sending unit been also swapped :squint:

will have a look , thx :tup:

 

[dirtdemon]

Re: sick issues under boost ... please help AAARRRGH

Re: sick issues under boost ... please help AAARRRGH

A boost leak would have to be somewhere between the turbo and the intake... Did your wastegate flapper come disconnected? Pull your intake and see if your turbo spins freely, maybe its siezing up on you...
-Rob

good idea - will check this too , thx !!! :tup:

 

[dirtdemon]

Re: sick issues under boost ... please help AAARRRGH

Re: sick issues under boost ... please help AAARRRGH

THATS WHY I LUV THIS BOARD, ALWAYS QUALIFIED ANSWERS - THX A LOT GUYS, KEEP IT COMING :cheers:

pat.

 

[QUICK STORM]

Re: sick issues under boost ... please help AAARRRGH

Re: sick issues under boost ... please help AAARRRGH

your replies are the most colorful on the board

 

[dirtdemon]

Re: sick issues under boost ... please help AAARRRGH

Re: sick issues under boost ... please help AAARRRGH

your replies are the most colorful on the board

thx. always a pleasure :colors:

:syty:

regards, pat.

 

[dirtdemon]

Re: sick issues under boost ... please help AAARRRGH (update)

Re: sick issues under boost ... please help AAARRRGH (update)

is it possible that my ignition system has a tilt ?

means, i got stock wires and an MSD coil w/o probs for a year and swaped em as a routine, now i got the cap + rotor + wires from RPM (look : http://www.raceprovenmotors.com/cart/index.php?cPath=21_136 )

now, is there a chance that this setup fights the MSD coil ???

checked the turbo, spins good , no leak form turbo to upper IC to manifold intake, WG rod connected ...
... what else could have happend :steamer: ???

can i check the FP in another way then @ idle on fuelrail ?

please :repost:

 

[bezerk]

Re: sick issues under boost ... please help AAARRRGH (update)

Re: sick issues under boost ... please help AAARRRGH (update)

is it possible that my ignition system has a tilt ?

means, i got stock wires and an MSD coil w/o probs for a year and swaped em as a routine, now i got the cap + rotor + wires from RPM (look : http://www.raceprovenmotors.com/cart/index.php?cPath=21_136 )

now, is there a chance that this setup fights the MSD coil ???

checked the turbo, spins good , no leak form turbo to upper IC to manifold intake, WG rod connected ...
... what else could have happend :steamer: ???

can i check the FP in another way then @ idle on fuelrail ?

please :repost:

you need to see if your FP raises underboost, i needs to raise 1psi FP at 1psi of boost.
idle won't show anything, maybe powerlaucnhing it, while somebody is checking to see if it raises, but damn, would that look silly once the brakes stop working.

you could also have a vacuum leak, maybe you need to check that.

 

[dirtdemon]

Re: sick issues under boost ... please help AAARRRGH (update)

Re: sick issues under boost ... please help AAARRRGH (update)

you need to see if your FP raises underboost, i needs to raise 1psi FP at 1psi of boost.
idle won't show anything, maybe powerlaucnhing it, while somebody is checking to see if it raises, but damn, would that look silly once the brakes stop working.

you could also have a vacuum leak, maybe you need to check that.

hey man, good to hear from you :cheers:

...and the coil can not be an issue ??? :werd:

TIA, pat.

 

[dirtdemon]

Re: sick issues under boost ... please help AAARRRGH (UPDATE !!!)

Re: sick issues under boost ... please help AAARRRGH (UPDATE !!!)

c'mon - would you mind ... :repost:

feelin'

 

[bezerk]

Re: sick issues under boost ... please help AAARRRGH (UPDATE !!!)

Re: sick issues under boost ... please help AAARRRGH (UPDATE !!!)

why don't you try a different coil? and check your ignition system

 

[dirtdemon]

Re: sick issues under boost ... please help AAARRRGH (UPDATE !!!)

Re: sick issues under boost ... please help AAARRRGH (UPDATE !!!)

why don't you try a different coil? and check your ignition system

... i tossed my stockcoil after the MSD passed the test :banghead:

and ignition sytem is brandnew (borg-warner cap+rotor, taylor wires) ...

... and still confused :hissyfit:

will double-check the wires, hoping the probs are gone ... if not - am i right when i think the only possibility left is the fuelpressure - or else ?

 

[bezerk]

Re: sick issues under boost ... please help AAARRRGH (UPDATE !!!)

Re: sick issues under boost ... please help AAARRRGH (UPDATE !!!)

you don't have datamaster?

 

[dirtdemon]

Re: sick issues under boost ... please help AAARRRGH (UPDATE !!!)

Re: sick issues under boost ... please help AAARRRGH (UPDATE !!!)

not yet - :squint:

... just collecting ideas :bored:

 

[dirtdemon]

Re: sick issues under boost ... AAARRRGH (2nd UPDATE !!!)

Re: sick issues under boost ... AAARRRGH (2nd UPDATE !!!)

2nd update :

today pulled wires one by one on running engine - seems like anything on cylinder no.5 has a tilt ... i mean the wires (taylor spiro pro) are brand new ...

sounds like i got a broken plug , aye ???

is it possible that all the symptoms came from one fawked sparkplug ???
(must have happend when throwing 'em in, cuz they're also new)

... and : do i have a real chance things come fine after swapping the plug :dunno:

 

[Kybol]

Re: sick issues under boost ... AAARRRGH (2nd UPDATE !!!)

Re: sick issues under boost ... AAARRRGH (2nd UPDATE !!!)

I know, mine would do this when ever it was really hot out. Never had time to fix it yet, but my fuel pump just quit when I went to start it a couple days ago, so hopfully the problems are related.