not building boost, am i missing something? Options

[lagos]

guys its not measured in negative numbers. its measured in inches of mercury which is considered a vacuum. if you made it negative then its considered boost. make sense?

now 14 to 16 is pretty low and 12 is really low. have you done a compression test?

I havent done one since the problem started, its not often on 12 but consistently 15-16

Thats way too low. Do a compression test next.
Where is the boost gauge taking its vac from?

[easternpiro1]

guys its not measured in negative numbers. its measured in inches of mercury which is considered a vacuum. if you made it negative then its considered boost. make sense?

now 14 to 16 is pretty low and 12 is really low. have you done a compression test?

I havent done one since the problem started, its not often on 12 but consistently 15-16

Thats way too low. Do a compression test next.
Where is the boost gauge taking its vac from?

the gauge is Tee'd into the line coming from the BOV to the intake manifold.

[easternpiro1]

Hi everyone Myself and Ben (bsamps) and Sam all took a look at the car this past weekend.

could not find the cause of leak but there is some concern that I may have a bad head gasket.

We did a compression test on the car and it initaly read from cylnder 150 150 135 152 (from cylinder 1-4)

after testing it again (immediately after a drive) it read 160 150 140 150. Im not sure of the compression stats for this motor but it seems consistent with the exception of cylinder 3.


also fond that my exhaust manifold wasnt flush with the head and tightened it. after It was re tightened the oil dispstick would not stay in and kept spitting out oil. (even after numerous attempts to adjust it) Suspicion is that this is a motor problem....

[bsamps4]

Turbo does seem to be putting out pressure, no leaks from the turbo or any abnormal signs of wear. Both inducer and exducer are intact and operating properly. Turbo is not burning oil at this time. Did notice that blow off valve is opening to let off any excess charge in the intake pipe, but is not making any noise due to the fact that the car is not making boost.
vacuum reading at full throttle is only reading at -4 inhg. Like Matt said the exhaust manifold was not torqued down and was leaking. After that was repaired the dip stick would not stay in the base of the motor and was pushing oil out at a high rate. Found a large oil leak on the back of the motor near the power steering pump (unsure of the origin). Found that the PCV valve is operating properly. Tested cooling system by bleeding water through the system. System would not bleed all air out of system and continued to push air through the upper funnel when squeezing the upper radiator hose. Engine shakes at idle and doesn't seem to put out as much power as it should even without boost when driving.
Checked vacuum lines and boost boost couplers. Found no leaks. Vacuum remains at -17 on inital start up at idle. Engine leans out occasionally and runs extremely rich occasionally without any changes in fuel pressure.

[presure2]

has anyone checked mechanical timing on this motor?

pushing oil out the dipstick, and the air in the rad both sound to me like symtoms of a blown headgasket. can you test the coolant for oil? (the little test kits they sell @ like autozone and stuff)
between that and the comp test, i'd guess either the HG is bad, or you have cracked ringlands.

[Smaay]

or the crankcase ventilation is plugged up

[bsamps4]

I'm gonna start tearing it down here in the next few days to find the culprit.

[bsamps4]

Haven't checked mechanical timing yet, but I will before I take the head off to have a look-see. Hopefully it's not a cracked ring-land. Not developing any smoke out of the tailpipe so this seems a bit weird...

[travisxcore]

Yea usually if a ringland is cracked you burn oil, not leak the hell out of it. Haha. Take the valve cover off and rev it up to see if you can hear/feel/see a surge of air/oil?

[playr158]

or the crankcase ventilation is plugged up

or not done correctly...could be

sounds like HG could be very likely.

[bsamps4]

*Fixed*

Observe...

http://www.youtube.com/watch?v=9cD_i1ihG6g...eature=youtu.be

This post has been edited by bsamps4: May 10, 2013 - 5:47 PM

[easternpiro1]

BOOYAH!

[travisxcore]

Went from negative boost to too much boost!

[lagos]

Less time on the internet + more time under the hood = fixed car.

What on earth was the problem?

[bsamps4]

Big plastic bag lodged in intercooler.

[SwissFerdi]

...

Well then, consider me bamboozled.

[lagos]

Big plastic bag lodged in intercooler.

Are you serious? WTF?

[Island_Racer]

Big plastic bag lodged in intercooler.

Are you serious? WTF?

this thread was like reading a suspense novel and this is the climax!?!?!?

Glad its fixed but the culprit issue made me laugh

This post has been edited by Island_Racer: May 11, 2013 - 5:01 PM

[easternpiro1]

...

Well then, consider me bamboozled.

YOURE BAMBOOZLED?!? im absolutely flabbergasted and befuddled!

Big plastic bag lodged in intercooler.

Are you serious? WTF?

YUP! all those times ive taken that piping off, inspected it and put water in the damn intercooler to check for leaks... i dont understand HOW IN THE WORLD that bag was in there all this time. it makes NO SENSE!

Big plastic bag lodged in intercooler.

Are you serious? WTF?

this thread was like reading a suspense novel and this is the climax!?!?!?

Glad its fixed but the culprit issue made me laugh

I thought ben was joking!! i was like ben..... TELL ME it wasnt in plain sight.... Ben: YUP! well ill be damned.... IT MUST HAVE beenlodged in the upper part of the end tanks because i looked in each end of them before putting water in there last summer or whenever it was I did that test.



SIGH... anywho the car runs like a MONSTER.... gotta fix a few small hiccups and ill be focusing on paint next!

[Keiri]

...wut.



Matt, wouldn't you have felt pissed if you'd sold the car and the new owner found and posted that the culprit was a plastic bag?!

Either way, good job Team Raleigh for being NC's boost headquarters. Now, anybody up for a V6 swap?

This post has been edited by Keiri: May 12, 2013 - 9:43 PM