Fuel cut out in overboost
06 May 2015, 05:18 PM
#1
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Fuel cut out in overboost
Hi , 1994 Subaru WRX jap import
Td05 , de cat pipe , hks air filter
3' straight through exhaust blitz
New age coil packs conversion
Main issue car is overboosting in third and fourth dare not push any harder. Boosting upto 20psi with foot to floor then fuel cut if I don't floor it not as bad . Any help would be appreciated thanks .
Td05 , de cat pipe , hks air filter
3' straight through exhaust blitz
New age coil packs conversion
Main issue car is overboosting in third and fourth dare not push any harder. Boosting upto 20psi with foot to floor then fuel cut if I don't floor it not as bad . Any help would be appreciated thanks .
06 May 2015, 07:23 PM
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06 May 2015, 07:30 PM
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Gonna check boost solenoid tomorrow . Then off for mapping next month.
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06 May 2015, 10:42 PM
#8
you could try running the vac line from the compressor nipple to teh wastegate directly. You'll be down to just spring pressure but at least you'll be further from fuel cut. Then simply reconnect the solenoid pipes when your getting the car mapped.
07 May 2015, 06:12 AM
#9
So there is no boost control on the car at all? No actuator, no wastegate, no boost solenoid or MBC? I'd start looking at this
07 May 2015, 11:10 AM
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07 May 2015, 03:45 PM
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07 May 2015, 04:11 PM
#16
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There are 3 pipes the one from the boost gauge , the one from bcs to airflow meter and one from the waste gate to the bcs . There is not one going from turbo . Help
07 May 2015, 06:20 PM
#17
take a picture it will help to explain what you have.
You will have either a 2port or a 3port solenoid.
3 port will be:
be pipe from compressor nipple to BCS
pipe from wastegate nipple to BCS
pipe from intake to BCS
2 port will be:
pipe from turbo nipple to wastegate nipple with a T piece in it.
T pipe goes to BCS.
BCS hooked up to intake on it's second port.
Whichever you have, unhook it and hook one of your now unused pipes from the turbo compressor nipple directly to the turbo wastegate nipple.
You will have either a 2port or a 3port solenoid.
3 port will be:
be pipe from compressor nipple to BCS
pipe from wastegate nipple to BCS
pipe from intake to BCS
2 port will be:
pipe from turbo nipple to wastegate nipple with a T piece in it.
T pipe goes to BCS.
BCS hooked up to intake on it's second port.
Whichever you have, unhook it and hook one of your now unused pipes from the turbo compressor nipple directly to the turbo wastegate nipple.
07 May 2015, 06:55 PM
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take a picture it will help to explain what you have.
You will have either a 2port or a 3port solenoid.
3 port will be:
be pipe from compressor nipple to BCS
pipe from wastegate nipple to BCS
pipe from intake to BCS
2 port will be:
pipe from turbo nipple to wastegate nipple with a T piece in it.
T pipe goes to BCS.
BCS hooked up to intake on it's second port.
Whichever you have, unhook it and hook one of your now unused pipes from the turbo compressor nipple directly to the turbo wastegate nipple.
You will have either a 2port or a 3port solenoid.
3 port will be:
be pipe from compressor nipple to BCS
pipe from wastegate nipple to BCS
pipe from intake to BCS
2 port will be:
pipe from turbo nipple to wastegate nipple with a T piece in it.
T pipe goes to BCS.
BCS hooked up to intake on it's second port.
Whichever you have, unhook it and hook one of your now unused pipes from the turbo compressor nipple directly to the turbo wastegate nipple.
07 May 2015, 08:24 PM
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07 May 2015, 08:41 PM
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Did you put the pill back in on the turbo nipple pipe, I know how your feeling I had a overboost problem I was hunting down for ages changed all the inlet pipe vac hoses manifold gasket cleaned bcs, one of the fixed it,, are your vac pipes rock solid mine were and assumed there may of been cracks in couldn't spot as they were brittle, change it all for silicone
07 May 2015, 08:49 PM
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........
Did you put the pill back in on the turbo nipple pipe, I know how your feeling I had a overboost problem I was hunting down for ages changed all the inlet pipe vac hoses manifold gasket cleaned bcs, one of the fixed it,, are your vac pipes rock solid mine were and assumed there may of been cracks in couldn't spot as they were brittle, change it all for silicone
Last edited by worthy79; 07 May 2015 at 08:54 PM.
07 May 2015, 08:56 PM
#24
All pipes are fine I don't see any pill in pipe the previous pipe had a piece of copper in it but I think that was just a repair job .all are silicone too one had a hole in replaced it still the same . I know the car needs a remap but it used to boost just fine until other day
07 May 2015, 09:22 PM
#26
Is it a 2 port or 3 port solenoid then, the pill goes in a different place for each. 2 port with no pill will under boost. 3 port with no pill will overshoot. Definitely hooked the pipes all back Into the right place yeah? 3 port hooked up the wrong way will also overshoot.
07 May 2015, 10:11 PM
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Is it a 2 port or 3 port solenoid then, the pill goes in a different place for each. 2 port with no pill will under boost. 3 port with no pill will overshoot. Definitely hooked the pipes all back Into the right place yeah? 3 port hooked up the wrong way will also overshoot.
Thanks
07 May 2015, 10:21 PM
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