on my 93 twin turbo the secend turbo is going out i guess i loss speed after 5500 rpm is it my turbo or what
what should i do

 

you need to describe this a bit more, does it just loose power, what?

check your map sensor.

 

yea it losses power at 5500 the owner befor me took it to dealer and they said the secend turbo is going out but who knows there r money hungery people

 

it still reves till redlne but it gets slower i jest got it today and have not really put time into it i have a 1988 n/a but when it comes to turbo stuffi have no clue

 

do u have a boost gauge?

If not buy one, this will help u figure out the problem.

 

1) - Is your car smoking excessively after secondary transition (about 4500 rpm and above)?? If not, that's a good sign your secondary Turbo is probably healthy

2) - Do you hear a loud hiss or whoooosh sound at the time the car starts to lose power?? If so, that's where the power loss (boost leak) is probably coming from.

3) - What is your boost pattern at WOT while shifting through 3rd gear?? It should be 10-8-10. Anything less probably suggest you have boost leak issues or solenoid related problems.

You may be having boost leak problems that have nothing to do with specific Turbo failure. Please keep us posted on your findings.

 

First thing you need to do is go through this troubleshooting site:

http://www.autosportracetech.com/RX-...leshooting.htm

Just because you aren't maintaining boost, doesn't necessarily mean the turbo is shot.

 

Another common problem is the cat or pre-cat clogging up. If you have a pre-cat, replace it with a downpipe. If your main cat is clogged, a high-flow cat is a good replacement, or a lower mileage stock one. The main symptoms are lowering boost at high rpms, because the engine is pushing its maximum flow.