What can stop a turbo boosting ?
20 January 2014, 02:37 PM
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What can stop a turbo boosting ?
Ok so air enters through the filter then through the maff into the turbo and as far as I can see a turbo is a manual device not electronic ? So technically the air going in should make the turbo spool ? So if it's not and you know the turbo is ok then what is going on ?
Thoughts ?
Thoughts ?
Last edited by ScoobyFanatic33; 20 January 2014 at 05:00 PM.
20 January 2014, 03:58 PM
#4
the turbo is driven by exhaust gas on the hot side. This draws in cold air on the cold side (compressor) via the inlet tract (air filter, pipework and MAF in some cases)
Whats the problem?
Whats the problem?
Last edited by LewisScoob; 20 January 2014 at 04:00 PM.
20 January 2014, 04:01 PM
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20 January 2014, 04:05 PM
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if you are asking why is your car not making boost and you know for sure your turbo is ok.
it could be.
boost leak from pipes,crack/hole in intercooler
defective waste gate
defective waste gate actuator
recirculating valve/dump valve
faulty boost valve
and so on,what boost are you making????
it could be.
boost leak from pipes,crack/hole in intercooler
defective waste gate
defective waste gate actuator
recirculating valve/dump valve
faulty boost valve
and so on,what boost are you making????
20 January 2014, 04:20 PM
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lol yeah ok just reread this and yes i got it back to front !
Still learning
Ok not getting any boost except 0.2 but im not exactly confident that's boost at all.
I have checked the following:
All Pipework - All Ok
Wastegate & Turbo - Tested All Ok
Dump Valve Replaced - Tested All Ok
Boost Soleniod Replaced - Tested All Ok
Still learning
Ok not getting any boost except 0.2 but im not exactly confident that's boost at all.
I have checked the following:
All Pipework - All Ok
Wastegate & Turbo - Tested All Ok
Dump Valve Replaced - Tested All Ok
Boost Soleniod Replaced - Tested All Ok
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20 January 2014, 04:22 PM
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have done a diagnostics and the only fault shown was 02 sensor but to be honest that has no bearing on turbo boost as far as i know.
Car drives like a non turbo but travels through the revs fine and apart from the boost missing you would not suspect an issue at all.
Car drives like a non turbo but travels through the revs fine and apart from the boost missing you would not suspect an issue at all.
20 January 2014, 04:59 PM
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no, only top mount. is the intercooler in good condition ? my mate broke a weld on a new hks intercooler on his supra that then cost him almost 1bar in boost.
20 January 2014, 05:01 PM
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im going to disconnect the front mount to rule it out altogether as i have the original top mount one still just so i can rule it out, im actually amazed with how much effect a possible air leak can have !
20 January 2014, 05:15 PM
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see if you can block one end off a pressurise it. check welds with washing up liquid. a small hole will be enough to let off your boost. how much pre load did your waste gate have?
Last edited by Pigman149; 20 January 2014 at 05:19 PM.
20 January 2014, 06:14 PM
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glad to hear it, even if the one you have has boost issues you will still look better driving it than that silver one.let us know if you find anything wrong with the front mount.
20 January 2014, 06:14 PM
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have done a diagnostics and the only fault shown was 02 sensor but to be honest that has no bearing on turbo boost as far as i know.
Car drives like a non turbo but travels through the revs fine and apart from the boost missing you would not suspect an issue at all.
Car drives like a non turbo but travels through the revs fine and apart from the boost missing you would not suspect an issue at all.
if you had a leak you would hear it hiss when moving.
i vote turbo has toasted itself.
20 January 2014, 07:57 PM
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FINALLY !
Mystery bloody well solved and boost is back with a vengeance sitting at 0.8 - 0.9 psi ! Get In !
Turns out that the sponge filter on the end of the maff was in fact too thick and was causing all the issues, took it out to check all was clean and forgot to put it back in whilst giving it a test up the road and booooomm ! Rocket
Got back and noticed filter was still out so changed it for a thinner one and again ran perfectly !
Happy is not the word lol
Mystery bloody well solved and boost is back with a vengeance sitting at 0.8 - 0.9 psi ! Get In !
Turns out that the sponge filter on the end of the maff was in fact too thick and was causing all the issues, took it out to check all was clean and forgot to put it back in whilst giving it a test up the road and booooomm ! Rocket
Got back and noticed filter was still out so changed it for a thinner one and again ran perfectly !
Happy is not the word lol