PimpDrive
Probationary Member
- 25
- 0
- Nov 11, 2003
-
milwaukee,
Wisconsin
This is very long but please read 
Ok. So this is the prob i have. a few (3-4)months back i let my bro borrow my car for a few days. One day he calls me to tell me the car is having a problem where if it goes into boost, it will stutter like hell to the point where it wont even idle unless you play with the throttle. So it totally runs like crap untill i shut the car off for a few mins and start it back up. So i go over to his house to see what the hell is going on with the car, I take it around the block to see how the problem occurs, (i have a aftermarket boost gauge btw) and once i get the car to about 1lb of boost, it starts to run terrible so i have to pull off the road and turn it off for a few mins then turn it back on, then it will idle fine and i can drive it around untill it goes into boost. The thing is that it will run fine while it is still in vac. but there was this howling noise(bear with me)..So a few months back i posted a thread about it and no luck.
Now before i begin I would like to say that i have really had NO time and really NO money, so this is partially the reason for not fixing it asap. I have been driving around with this problem for months now. I have to drive "special" so it will never go into boost.. And it really sucks cause i basically have to accelerate really really slow to avoid boosting it.... it really sucks trying to merge on the freeway cause people get pissed cause im going to slow..
Ok recently in the past few weeks this is what i have noticed. The INFAMOUS HOWLING NOISE.. Now i have done multiple leak checks, months back and again recently using this method. http://www.vfaq.com/mods/ICtester.html now what is sounds like is the bov is just stuck open. like it is recirculating all the time, all while never driving in boost. And the "howl" gets louder in sync with the turbo spooling up. Now the weird thing is that the last few weeks while driving the thing sometimes the noise just goes away for bout a half min, and then the noise returns?? so on the commutes to and from work the noise will go away a few times for a few secs, and when it does, I get on the gas and can boost it to about 10ish with no problems. and it pulls and all but then sometimes when in boost(about 10ish lbs.) i get a howling/wooshing noise. It almost sounds as if a ic hose popped off and sometimes pops back on, Or like a really loud/weird atmosphere bov dump??
This is what I have done
1. took all the intake off from the turbo to the tb..(the j-pipe, lower ic pipe, the lower rubber hoses, the intercooler, the stock upper plastic ic pipe, the stock rubber upper hose, mas and s-pipe).
2.individually pressurized and checked for leaks on all of the above.
3. checked for cracks in the hard pipes and rubbber hoses.
4.checked for signs of damage or cracks on the 1g bov.
5. checked all clamps to see if stripped.
6.checked for signs of damage or cracks on the mas.
7. looked for damage or cracks on the s-pipe(one before the turbo)
8.put it all back together nice and tight
9. checked all mating surfaces and gaskets( bov, j-pipe)
10.blocked off holes in s-pipe for evap and pcv.
11.blocked off egr.
12.blocked off the bov.
13.boost leak check once everything was tightened and blocked off.
14.tested bov with vaccume/boost pump(dont matter cause i blocked if off anyway)
15. tested wastegate actuator with pump.(it did bleed off pressure by it self though)??
16. pulled on the wastegate rod to check for tension.
17.made sure the w/g actuator rod was connected to the wastegate+ cotter pin.
18.checked all vaccume hoses( please say if there are "mystery" hoses somewhere)
the only things not connected are the evap and pcv hoses cause i plugged the intake completely. and the coolant lines to the tb, i rerouted it.
And i still get the howling noise.
Now everything is blocked off so there should be no leak, bov cant even vent.. all vac lines have been checked for cracks and connection. boost leak checked. which i am also gonna do tomorrow again.
So maybee
1. w/g problem? maybe flapper broke off??
2.some weird problem with the manifold between the tb and head?
3.bad valves or lifters?
4.w/g actuator?
5.boost selenoid??
whatever it is, it stumps me on how the problem is there 90% of the time and occasionally it will go away and i can boost? now like I said earlier, NO money, so help would be GREATLY APPRECIATED before i go and start ripping the whole motor apart in search for this howl that likes to go away occasionally. now since it is a "howling noise" i kinda ruled out ignition problems, (correct me if i should not rule it out). but when i get it into boost and it runs like crap, its sorta like 2 cylinders are not firing, or timing really far off.
PLEASE HELP
PS, sorry for the grammar.
Ok. So this is the prob i have. a few (3-4)months back i let my bro borrow my car for a few days. One day he calls me to tell me the car is having a problem where if it goes into boost, it will stutter like hell to the point where it wont even idle unless you play with the throttle. So it totally runs like crap untill i shut the car off for a few mins and start it back up. So i go over to his house to see what the hell is going on with the car, I take it around the block to see how the problem occurs, (i have a aftermarket boost gauge btw) and once i get the car to about 1lb of boost, it starts to run terrible so i have to pull off the road and turn it off for a few mins then turn it back on, then it will idle fine and i can drive it around untill it goes into boost. The thing is that it will run fine while it is still in vac. but there was this howling noise(bear with me)..So a few months back i posted a thread about it and no luck.
Now before i begin I would like to say that i have really had NO time and really NO money, so this is partially the reason for not fixing it asap. I have been driving around with this problem for months now. I have to drive "special" so it will never go into boost.. And it really sucks cause i basically have to accelerate really really slow to avoid boosting it.... it really sucks trying to merge on the freeway cause people get pissed cause im going to slow..
Ok recently in the past few weeks this is what i have noticed. The INFAMOUS HOWLING NOISE.. Now i have done multiple leak checks, months back and again recently using this method. http://www.vfaq.com/mods/ICtester.html now what is sounds like is the bov is just stuck open. like it is recirculating all the time, all while never driving in boost. And the "howl" gets louder in sync with the turbo spooling up. Now the weird thing is that the last few weeks while driving the thing sometimes the noise just goes away for bout a half min, and then the noise returns?? so on the commutes to and from work the noise will go away a few times for a few secs, and when it does, I get on the gas and can boost it to about 10ish with no problems. and it pulls and all but then sometimes when in boost(about 10ish lbs.) i get a howling/wooshing noise. It almost sounds as if a ic hose popped off and sometimes pops back on, Or like a really loud/weird atmosphere bov dump??
This is what I have done
1. took all the intake off from the turbo to the tb..(the j-pipe, lower ic pipe, the lower rubber hoses, the intercooler, the stock upper plastic ic pipe, the stock rubber upper hose, mas and s-pipe).
2.individually pressurized and checked for leaks on all of the above.
3. checked for cracks in the hard pipes and rubbber hoses.
4.checked for signs of damage or cracks on the 1g bov.
5. checked all clamps to see if stripped.
6.checked for signs of damage or cracks on the mas.
7. looked for damage or cracks on the s-pipe(one before the turbo)
8.put it all back together nice and tight
9. checked all mating surfaces and gaskets( bov, j-pipe)
10.blocked off holes in s-pipe for evap and pcv.
11.blocked off egr.
12.blocked off the bov.
13.boost leak check once everything was tightened and blocked off.
14.tested bov with vaccume/boost pump(dont matter cause i blocked if off anyway)
15. tested wastegate actuator with pump.(it did bleed off pressure by it self though)??
16. pulled on the wastegate rod to check for tension.
17.made sure the w/g actuator rod was connected to the wastegate+ cotter pin.
18.checked all vaccume hoses( please say if there are "mystery" hoses somewhere)
the only things not connected are the evap and pcv hoses cause i plugged the intake completely. and the coolant lines to the tb, i rerouted it.
And i still get the howling noise.
Now everything is blocked off so there should be no leak, bov cant even vent.. all vac lines have been checked for cracks and connection. boost leak checked. which i am also gonna do tomorrow again.
So maybee
1. w/g problem? maybe flapper broke off??
2.some weird problem with the manifold between the tb and head?
3.bad valves or lifters?
4.w/g actuator?
5.boost selenoid??
whatever it is, it stumps me on how the problem is there 90% of the time and occasionally it will go away and i can boost? now like I said earlier, NO money, so help would be GREATLY APPRECIATED before i go and start ripping the whole motor apart in search for this howl that likes to go away occasionally. now since it is a "howling noise" i kinda ruled out ignition problems, (correct me if i should not rule it out). but when i get it into boost and it runs like crap, its sorta like 2 cylinders are not firing, or timing really far off.
PLEASE HELP
PS, sorry for the grammar.
