Engine Dies As Soon As Boost Is +

[mistermatt516]

Hi all, Been lurking for some time. I dont know where to start looking. She wants to take off...but as soon as the boost hits postive the car lurches and stalls...I likely wont be doin the work myself...but would love info so i can talk to the mech....thanks...

PS
Im still looking for a reliable mech on long island if anyone knows one that knows these cars.....thanks....

Matt

 

[mkiiSupraMan18]

codes?

sounds like code 52...

 

[MDCmotorsports]

Turbo?

Yes?

B
O
O
S
T

L
E
A
K

B double O to the S to the T on my L to the E on my A then K.

Boost leak.

 

[mistermatt516]

thanks guys....whats a code 52?
please excuse my naivte' but how would i go about looking for the leak being that the car seems to need to be in gear? just thought i would look for it myself before getting reammed by a mech....

 

[aye mate]

Turbo?

Yes?

B
O
O
S
T

L
E
A
K

B double O to the S to the T on my L to the E on my A then K.

Boost leak.

W to the E to the R to the D

 

[GrimJack]

Boost leak can be found by inspecting the intercooler pipes, more often than not there are several by now - the accordian pipe that feeds air to the turbo usually cracks, as does the rubber pipe off the compressor side of the turbo and the rubber coupler between the 3000 pipe and the throttle body.

 

[mistermatt516]

thats exactly the kind of things i needed to know...thanks again....!

 

[IHI-RHC7]

Check the plastic hard pipe that goes through the fender as well.
Does your check engine light come on? If so it could be bas knock sensor wiring, or a bad AFM.

 

[mistermatt516]

Check the plastic hard pipe that goes through the fender as well.
Does your check engine light come on? If so it could be bas knock sensor wiring, or a bad AFM.

yes the check engine light comes on....have no idea what those things you just said were....lol...but thanks

 

[GrimJack]

If your CEL (Check Engine Light) comes on, then you need to pull your codes and tell us what it says.

Follow these instructions: http://www.cygnusx1.net/supra/techtip/engineerrorcodes.html

 

[chevyeater]

Where on Long Island? I may be able to take a look if you are local...

 

[mistermatt516]

Where on Long Island? I may be able to take a look if you are local...

Nassau County...Hicksville to be exact...that would be awesome....I am here in texas until Sat nov12th...Then i'll be fixing the car and driving it back down here....
where on the island are you?

 

[kapkaniMD]

sorry to open this thread again, but I am having the same problem, I am wondering if the problem with this car was ever found. Thanks

 

[Doward]

Kap, the culprit 9/10 times is a severe boost leak. Do a search for 'boost leak detector' - you should be able to check for any leaks.

For that matter, if you find you need new IC pipes, I've got a complete set for sale, for dirt cheap.

 

[bigaaron]

I don't think this one is a boost leak at all guys, the way he explained it, the first thing I would look at is the fuel pump relay. When boost rises the relay switches off the resistor and switches 12v directly to the pump. If the relay has a bad contact it will do exactly what he explained, it will stall as soon as there is any boost pressure. You may not get a code for that either, becuase you just loose fuel pressure, and there is no monitor for that in the stock setup. What I do on my own cars is replace the old stock relay with a Bosch 30amp relay. I have also fixed this issue on several customer cars.

 

[Doward]

Oh, good one Aaron - that is a possibility. I had the same problem when I found out the IC hose off the turbo was sporting a split about 5" long.

 

[kapkaniMD]

Kap, the culprit 9/10 times is a severe boost leak. Do a search for 'boost leak detector' - you should be able to check for any leaks.

For that matter, if you find you need new IC pipes, I've got a complete set for sale, for dirt cheap.

Thanks for the hint, I will check into it, however I have all metal IC pipes so it would have to be a joint or something.

Also thanks for the heads up on the relay, I actually read that on another post and plan on looking into that as well. Is there a specific kind of bosch relay I need to get or just the one that they sell at like discount auto.

 

[mistermatt516]

Thanks for the hint, I will check into it, however I have all metal IC pipes so it would have to be a joint or something.

Also thanks for the heads up on the relay, I actually read that on another post and plan on looking into that as well. Is there a specific kind of bosch relay I need to get or just the one that they sell at like discount auto.

hey all..sending this from my phone hope it goes thru....it turned out to be a leask in the HKS tee...as well as a shitty knock sensor....

 

[Burntz]

haha, 2 years later you tell us

 

[kapkaniMD]

When boost rises the relay switches off the resistor and switches 12v directly to the pump. If the relay has a bad contact it will do exactly what he explained, it will stall as soon as there is any boost pressure. You may not get a code for that either, becuase you just loose fuel pressure, and there is no monitor for that in the stock setup. What I do on my own cars is replace the old stock relay with a Bosch 30amp relay. I have also fixed this issue on several customer cars.

Hey man, would you happen to be able to give me a quick instruction on the install if I get the bosch 30amp relay, I know how it works i just need to know which wires are which(ie which one is power, switch, etc..) Thanks

also, the dealership one is like $67 and autozone has one that is $60 but it doesnt look anything like a regular relay, http://www.autozone.com/R,APP127110...partType,01258/shopping/partProductDetail.htm , is the bosch one still the way to go??