Strange boost leak
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From: Taftville, CT
Strange boost leak
Here's my problem:
The car holds 1.5bar no problem until 5000rpm. At that point, I can hear an obvious leak somewhere. It's strange because if I start in 6th gear at 40mph, it will hold the 1.5bar all the way until 5000rpm, then it suddenly starts to leak and won't hold any more than .6bar. The car IS NOT lurching or anything that would indicate a major boost leak after the MAF sensor. I tried it at all pressure levels between .78bar and 1.5bar. Does the same thing regardless and only above 5000rpm. I checked all the fittings on the uicp and the bov. I haven't checked the licp connections yet. I'll be checking everything again tomorrow, but if its not the IC connections then what could it be? I'm thinking that the BOV isn't holding the pressure, causing it to recirculate, hence the non-lurching. Any ideas?
The car holds 1.5bar no problem until 5000rpm. At that point, I can hear an obvious leak somewhere. It's strange because if I start in 6th gear at 40mph, it will hold the 1.5bar all the way until 5000rpm, then it suddenly starts to leak and won't hold any more than .6bar. The car IS NOT lurching or anything that would indicate a major boost leak after the MAF sensor. I tried it at all pressure levels between .78bar and 1.5bar. Does the same thing regardless and only above 5000rpm. I checked all the fittings on the uicp and the bov. I haven't checked the licp connections yet. I'll be checking everything again tomorrow, but if its not the IC connections then what could it be? I'm thinking that the BOV isn't holding the pressure, causing it to recirculate, hence the non-lurching. Any ideas?
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From: Taftville, CT
If I had a major leak after the MAF sensor, the the car would shake and lurch and run like ****. When this happens, the boost holds steady for however long it takes to get to 5k rpm then it just drops to .6bar. The car doesn't act like a boost leak, it just doesn't accelerate as fast. I can hear an air noise, though. I'm pretty sure its the spring in the BOV, so I'll pull that out later today and check it out.
Do you still have the stock air box in?
If so make sure that you have not damaged the clips that hold the snorkle down.
Otherwise you will suck it up against the hood and it will choke the turbo for air and it will sound like a leak. Also you feel like you lose all kinds of power.
If that is not it then I would begin to be doing a boost leak test on all the lines.
Just my .02
If so make sure that you have not damaged the clips that hold the snorkle down.
Otherwise you will suck it up against the hood and it will choke the turbo for air and it will sound like a leak. Also you feel like you lose all kinds of power.
If that is not it then I would begin to be doing a boost leak test on all the lines.
Just my .02
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From: Taftville, CT
Originally Posted by newbie03evo
Do you still have the stock air box in?
If so make sure that you have not damaged the clips that hold the snorkle down.
Otherwise you will suck it up against the hood and it will choke the turbo for air and it will sound like a leak. Also you feel like you lose all kinds of power.
If that is not it then I would begin to be doing a boost leak test on all the lines.
Just my .02
If so make sure that you have not damaged the clips that hold the snorkle down.
Otherwise you will suck it up against the hood and it will choke the turbo for air and it will sound like a leak. Also you feel like you lose all kinds of power.
If that is not it then I would begin to be doing a boost leak test on all the lines.
Just my .02
Bingo! Damn, I did't even think of that. I broke the last clip the day before. Thank you very much.
