This engine(all stock) has 2 main problems:
1.Builds boost starting from 3000 rpm
2.After boost (arround 1 bar@3500 rpm)is build runs agresive(as much 1 bar can be) and starts to hold back,a little after that runs fine again.
I checked wastegate(diafragm,spring,not sticking),boost leaks untill 1.2 bar,bypass valve new,n75 new,1.8 turbo coils conversion new,f5dpor's new,engine timing corect.
Found a leak and repaired it,found hose near ecu being strangulated/repaired,coils installed without moding rubber near the top and they were not getting enough down and repaired that.Much better but not enough.
About late building boost i should open the turbo and ceck the interior of the blades condition(they can not be seen without opening cases and i found once 1 turbine wheel crushed,the inducer damaged with the exducer in perfect condition and no shaft play)
What other reason can cause so late building of boost?Cats?
I tried my ecu in this car with more boost eproms in it(my car running good)and it runs worse,so another reasons i think it holds back could be:
a.fuel pressure that i will ceck.I guess low fuel could get knock and ignition gets retarded(but boost stays steady)
b.knock sensors faulty.
Or what?
I will get a log with my car and my ecu,and a log with the faulty car also with my ecu and compare timing advance.
What should be more interesting to log?rpm,timing,throttle position,iat and what else?
Thank you.
Remembered a fiew things:
Temp sensor not checked(i will see at diagnose what it says)
The little 1 way valve under IM that lets only oil fumes to go to intake not boost to go down NOT CECKED
Throttle position not checked if it sees wot
Iat not cecked.
And the most concerning thing:tappets are very noisy.Especialy when hot.Could that create a detonating signal for sensors and that is why it might retard advance?This could explain why it runs better when not so hot...
1.Builds boost starting from 3000 rpm
2.After boost (arround 1 bar@3500 rpm)is build runs agresive(as much 1 bar can be) and starts to hold back,a little after that runs fine again.
I checked wastegate(diafragm,spring,not sticking),boost leaks untill 1.2 bar,bypass valve new,n75 new,1.8 turbo coils conversion new,f5dpor's new,engine timing corect.
Found a leak and repaired it,found hose near ecu being strangulated/repaired,coils installed without moding rubber near the top and they were not getting enough down and repaired that.Much better but not enough.
About late building boost i should open the turbo and ceck the interior of the blades condition(they can not be seen without opening cases and i found once 1 turbine wheel crushed,the inducer damaged with the exducer in perfect condition and no shaft play)
What other reason can cause so late building of boost?Cats?
I tried my ecu in this car with more boost eproms in it(my car running good)and it runs worse,so another reasons i think it holds back could be:
a.fuel pressure that i will ceck.I guess low fuel could get knock and ignition gets retarded(but boost stays steady)
b.knock sensors faulty.
Or what?
I will get a log with my car and my ecu,and a log with the faulty car also with my ecu and compare timing advance.
What should be more interesting to log?rpm,timing,throttle position,iat and what else?
Thank you.
Remembered a fiew things:
Temp sensor not checked(i will see at diagnose what it says)
The little 1 way valve under IM that lets only oil fumes to go to intake not boost to go down NOT CECKED
Throttle position not checked if it sees wot
Iat not cecked.
And the most concerning thing:tappets are very noisy.Especialy when hot.Could that create a detonating signal for sensors and that is why it might retard advance?This could explain why it runs better when not so hot...
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