boost problem

[GSRPSI]

well its really weird but when the car hit boost the car goes nowhere and it keeps boosting and doesnt stop until it back fires, its like its got a boost leak but I pulled the cooler of and all the piping checked all the silicone hoses and all the vacuum hoses and there all fine, and the boost has been screwed right down.
I dont have any more ideas, maybe someone can help.
Its a 94 GSR 4G93

 

[JSTYLE]

well its really weird but when the car hit boost the car goes nowhere and it keeps boosting and doesnt stop until it back fires, its like its got a boost leak but I pulled the cooler of and all the piping checked all the silicone hoses and all the vacuum hoses and there all fine, and the boost has been screwed right down.
I dont have any more ideas, maybe someone can help.
Its a 94 GSR 4G93

firstly.. dont EVER let a car backfire.. all that pressure will bend a rod in a 93 motor..

have you checked your cat? maybe its blocked..

Jon

 

[GSRPSI]

well when i put the TDO5 on i had a look at the cat and it was all sweet, but i dont think its that coz on the weekend i pulled all the piping and shit off, it ran sweet for a few days and now its back

 

[doommachine]

Timing could be really really out? Is it harder to start?

Could be an exhaust leak?

Unbolt the pipe that comes out of the turbo, move it around a bit, and blow really hard into it, see if you can hear air leaking.. or even better, make a proper boost leak tester

 

[Dean]

u might have a similar problem to me.
is it when u upp the boost a bit..it whizzes but goes nowhere...?
id suggest spark plugs and leads...this is what i have been recommended

 

[GSRPSI]

Timing could be really really out? Is it harder to start?

nah its starts fine

and i changed the spark plugs and leads a while ago

 

[GSRPSI]

well i replaced the wastegate actuator but the problem is still there

any more sugestions?

i have had a ggod running car for ages now its really starting to piss me off

 

[3zercrowd]

well i replaced the wastegate actuator but the problem is still there

any more sugestions?

i have had a ggod running car for ages now its really starting to piss me off

Please list your complete mods so I can have a think about it..... :wink:

 

[GSRPSI]

ummm, tdo5 14b, 3ich exhaust from dumb pipe back, front mount, pod filter and thats about it

 

[slaya]

or even better, make a proper boost leak tester

explain...
i need to test mine just to make it easier

 

[GSR94T]

boost problems are usually (not in any order) caused by

1) blocked cat
2) stuffed actuator (which you already replaced)
3) split vacuum
4) intercooler pipe/hose leaking - some places can smoke test, also its possble but unlikely the intercooler itself
5) turbo itself

thats all i can think of at the moment