Hi Guys,
I bought a repairable write-off, 2007 D40 STX manual with 140,000 km on the clock. Perfect condition except for the dead motor. Injectors were out and some oil spray in the engine bay. No history available.
Long story extremely short, I did a dual chain mod, s/mass flywheel and HD clutch. Ran it and realised (the hard way) that the original problem was oil seal failure in the turbo. The engine began self-fuelling.
I have fitted an aftermarket turbo; it works ok, but the actuator is pulled on hard from start-up. Ive swapped the line to the old Garret turbo and same thing happens (full on except a slight pulsing) at idle. My guess is that the Garrett had failed because of overspooling.
I find plenty of comments about turbo control solenoids that don’t work, but never about one that works too well.
I have used a scope and measured the wave form to the solenoid and it appears to be correct. Before I rush out and buy a new solenoid I am wondering if anyone has had this problem, or is the vacuum pressure regulated back down the line.
Unfortunately, my manual shows the former YD25 vacuum air intake control system. This truck has electric control. Seems the vac system is quite different.
I haven’t measured the vacuum but it does not seem excessive. On the bench test, the solenoid opens and shuts correctly. The intercooler pressure sensor appears to be functioning, -in fact the only time I get the MIL on is when the sensor is disconnected.
Any thoughts or past experience will be appreciated. Signed, Bloody Frustrated!
I bought a repairable write-off, 2007 D40 STX manual with 140,000 km on the clock. Perfect condition except for the dead motor. Injectors were out and some oil spray in the engine bay. No history available.
Long story extremely short, I did a dual chain mod, s/mass flywheel and HD clutch. Ran it and realised (the hard way) that the original problem was oil seal failure in the turbo. The engine began self-fuelling.
I have fitted an aftermarket turbo; it works ok, but the actuator is pulled on hard from start-up. Ive swapped the line to the old Garret turbo and same thing happens (full on except a slight pulsing) at idle. My guess is that the Garrett had failed because of overspooling.
I find plenty of comments about turbo control solenoids that don’t work, but never about one that works too well.
I have used a scope and measured the wave form to the solenoid and it appears to be correct. Before I rush out and buy a new solenoid I am wondering if anyone has had this problem, or is the vacuum pressure regulated back down the line.
Unfortunately, my manual shows the former YD25 vacuum air intake control system. This truck has electric control. Seems the vac system is quite different.
I haven’t measured the vacuum but it does not seem excessive. On the bench test, the solenoid opens and shuts correctly. The intercooler pressure sensor appears to be functioning, -in fact the only time I get the MIL on is when the sensor is disconnected.
Any thoughts or past experience will be appreciated. Signed, Bloody Frustrated!
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