Is200 Turbo Converted Running Problems

[Snoopdazzydog]

Hi I'm a new member having just purchased a is200 with a turbo conversion, the car seems to run ok first thing for a few miles but seems that once engine warms up the car becomes really hesitant, it doesn't boost properly, you can hear the turbo spinning but nothing happens, possibly seems like a fueling problem but I'm no mechanic so looking for and advice,

Cheers

[BarneyTT]

Could be a whole host of things, my suggestion would be to take the car to a good rolling road/engine mapper and see what they suggest.

Welcome to the club.

[Snoopdazzydog]

Hi BarneyTT Not really got a good tuning specialist nearby that have a good reputation that's why I was asking on here for any obvious things to try, I have a p0115 engine code fault, I believe it's a faulty coolant temp sensor which I've ordered but not sure if this would cause a running issue?

[Wootty]

have you checked all intercooler pipework and connectors,if its spooling with no boost.wastegate actuator not set properly.??

I've had sti scoobs and focus rss and all turbo'd lumps are basically set up the same,start at the throttle body and work back thru the turbo,intercooler and back to airbox etc etc.

[Snoopdazzydog]

I thought waste gate actuator but wasn't sure how to set up correctly so I bought a manual boost controller and car is running a lot better I'm still not sure how far to adjust it though! On tickover my boost gauge shows negative -0.7 bar and on full boost will boost to o.3 bar which is 4.3psi not sure if this is normal either!

[Wootty]

be careful with manual boost controllers.

vacuum at idle should be around -1 to -.8 so your ok with inlet manifold pressure.

only .3 bar at full boost is deffo wrong.

depending on what ecu map its got??? should be running a safe .7- 1 bar.

can't remember what compression ratio these Toyota lumps are but id imagine 1.3 bar is a MAX.

without seeing it in the flesh I'm just speculating.

Phil.