No Boost Pressure!!!
03-29-02, 11:50 PM
#1
No Boost Pressure!!!
I don't know what the hell just happened but I just got back from Streetracing and during my second race of the night I shifted into 2nd and all the spectators, me, and the car I was racing heard a loud swooosh sound like a shooken up soda bottle. Anyways after that I had no boost pressure at all.
My car drives fine and still vacumns correctly but when I put the hammer down my boost gauge goes up to 0 psi or 1 psi and nothing more. My second turbo also never creates any boost. But the first race was fine and I have never had any other problems before. It sounded like I blew a vacumn line. Which lines should I look for? We looked with a flashlight at the top half of the engine but could not see anything but I know all the turbo setup is on the bottom. Could my wastegate be causing this by not letting my car go over 0 psi. It feels like it wants to still pull but it can't. Any help would be great.
I will be spending most of the night on the search for possible causes but I thouhgt this may help speed the process up some. I will use the search key so please don't bite my head off for posting. Thanks
My car drives fine and still vacumns correctly but when I put the hammer down my boost gauge goes up to 0 psi or 1 psi and nothing more. My second turbo also never creates any boost. But the first race was fine and I have never had any other problems before. It sounded like I blew a vacumn line. Which lines should I look for? We looked with a flashlight at the top half of the engine but could not see anything but I know all the turbo setup is on the bottom. Could my wastegate be causing this by not letting my car go over 0 psi. It feels like it wants to still pull but it can't. Any help would be great.
I will be spending most of the night on the search for possible causes but I thouhgt this may help speed the process up some. I will use the search key so please don't bite my head off for posting. Thanks
03-30-02, 05:32 AM
#2
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just get into your engine bay and check all hoses, make sure there all still good, so basically check every single one, same thing happened to me and i found that the hose on my wastegate had a tiny split in it......
03-30-02, 08:26 AM
#3
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Your secondary turbo is not going on, because you need at least 8 psi before the second turbo goes on. Your problem really isn't too much too worry about and will most likely be fixed pretty easily. However, it might take a little while.
The first thing to do is remove your intercooler hoses. Check for any cracks/spilts on the hoses. Now it's time to remove the Y-Pipe which is located between the intake and manifold. It looks like an upside down "C" which is connected on the ic hose and turbo. Check the Y-Pipe for any cracks/spilts. Also, the black rubber piece that is towards the end of the Y-Pipe has a tendency to spilt a lot. Now it's time to remove all your intake hoses. Remove all the hoses and if you haven't figured it out yet, you have to check for any cracks/spilts on all the hoses.
Most likely if you do all these steps you should have your boost back to normal. After you removed and checked every hose carefully, install them back on the car. Install the intake hoses, then your Y-Pipe and the last step will be your intercooler hoses. Do not just do a visual inspection. Also, another important thing to do is to properly install all the hoses tightly. Your problem is most likely from a cracked hose or a loose hose.
Basically you have to
1) Check both IC hoses. Check the lower IC hose carefully, this is the one that most likely splits
2) Check the Y-Pipe and the black rubber piece at the end of the pipe.
3) Intake hoses.
The first thing to do is remove your intercooler hoses. Check for any cracks/spilts on the hoses. Now it's time to remove the Y-Pipe which is located between the intake and manifold. It looks like an upside down "C" which is connected on the ic hose and turbo. Check the Y-Pipe for any cracks/spilts. Also, the black rubber piece that is towards the end of the Y-Pipe has a tendency to spilt a lot. Now it's time to remove all your intake hoses. Remove all the hoses and if you haven't figured it out yet, you have to check for any cracks/spilts on all the hoses.
Most likely if you do all these steps you should have your boost back to normal. After you removed and checked every hose carefully, install them back on the car. Install the intake hoses, then your Y-Pipe and the last step will be your intercooler hoses. Do not just do a visual inspection. Also, another important thing to do is to properly install all the hoses tightly. Your problem is most likely from a cracked hose or a loose hose.
Basically you have to
1) Check both IC hoses. Check the lower IC hose carefully, this is the one that most likely splits
2) Check the Y-Pipe and the black rubber piece at the end of the pipe.
3) Intake hoses.
Last edited by RecKleSs; 03-30-02 at 08:29 AM.
03-30-02, 01:05 PM
#4
I found that my lower I/C Pipe was disconnected. I just installed my Blitz SMIC and I must not have made the connection tight enough. I am going to keep looking for more problems but I bet that was all of it. All the vacumn lines are brand new like 3000 miles ago and installed by Pettit Racing. The search yeilded lots of posts about tis and I understand more now. I love this forum. It sucked cause I should have blown the doors off the guys Nitroused Z28 but I guess we'll have to wait and race next weekend. He felt good that he won, but no ****. I was running N/A with less than 200 hp against his 400hp car. Please. Iam going ot walk his ***.
03-31-02, 01:26 PM
#5
Nothing new found but now my car does not boost as high. It seems to have a little erratic boost pattern. Like instead of how it used to be 12-8-12, now it is more like 10-5-8-10-8-5-9-10. I mean it is never constant. I found that my filter for my air pump was just sitting in the Pettit cold air box but I don't know if that would cause such behavior. I am going to take it to the shop tomorrow and try to take it up on a hoist to look underneath for anything. What do you think may have caused this boost behavior? I reset the ECU by pulling the cables off for a while hoping to cure it but it did not do anything. It seems like 1st gear has the worst bood behavior while 2nd and 3rd seem to boost alot cleaner. I am lost right now. Just have to keep looking.
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