Hi everybody!
Today my 3rd FD test the power on DYNA. maybe over run the engine. after test the engine run unstable same the fuel not enough. And the rpm and the pressmeter show unstable too. and i'm smell fuel leak(i'm not sure)
the DYNA Graph show top power is 262.9ps at 6491 rpm and than suddenly slip to 120ps cannot going.
than we're stop the test.
1. the fuel hose is broken? or the turbo over boost(o.9bar)
2.before the test (i'm hear some leak air sound from front pipe between turbo) the turbo broken? have any relation about the turbo.
i'm very upset now please help me........

 

post the graph... check for boost leaks....maybe one of your couplers came off.

 

any smokes comming out from the exhaust?? popping sound?? Where was the fuel smell comming from??

 

Change your fuel filter.

 

Thankyou for your reply
I'm not sure where the smell same come from.
no pop sound, only engine vibration.
i'm very worry the turbo is broken.
this is the Dyno graph:

http://hk.photos.yahoo.com/jackpangwc

 

Anybody here?
I need your help please......

 

Run the fuel pressure tests as is shown in the Mazda service manual. It has three tests, engine not running with FP resistor working(about 32psi), engine idling(about 30psi), and engine not running max fuel pressure test(about 70-110psi).

While doing this look and smell for fuel leak.
Most common fuel failure in older cars is the fuel pulsation dampener(FPD) which is on top of the engine under the solenoid rack.

Check the map sensor hose, if it comes off the engine runs very rich and has low power.

 

cewrx7r1:
Is only Fuel system problem. Engine or turbo have any problem?

 

I doubt that it is a turbo problem. Could be fuel cut due to overboost. You woud have to list all your engine mods and type of ecu.

 

cewrx7rx1

My Fd mod list:

Power FC (ecu), HKS Twins power, Apex'turbo timer, Aprex' RSM, Deif prsee meter & oil temp. meter,
front-mid-down pipe,Greddy Pully kit, stock turbo & engine, F-win 46mm radiator, Trust intercooler

 

Maximum torque on a stock port or slightly ported
engine is about 6000 rpm. After that it comes down fairly fast even though max HP will be higher around 6500 rpm.

If your are using the PFC to control boost, then make sure that the max boost on the PFC boost control menu is higher than you are planning to run. If not, you get fuel cut. But I do not see another boost controller listed in your mods.

Have your fuel system checked out first, then re-dyno
again at 10 and 12psi boost and look for patterns.

 

Did you find any boost leaks? It is possible for the turbo to over-rev if there's a leak and you continue to push hard.

 

Am I the only one that noticed the numbers he was putting down were really low before the huge decrease in power given his mods. Which I believe he is referring to a full exhaust. He said he was pulling only 262 RWHP before the drastic loss of power. That is REALLY low and off a good roughly 40WHP given what boost he was running.

Just something I noticed, figured I would throw that into the equation.

 

im not to sure about this... 1bar = to 14 psi right?
what is your boost patern?? vacumm?

 

maybe it's an injector problem

 

I'm Set the boost at primary at 0.9bar i don't know=psi?
the car now become difficult start and easy off(have more gas smell).
Today already to pull garage.

i'll follow the situation and report to yours.

thankyou everybody.

 

1 bar = 14.7 psi