RX7 2RTR- 1308cc 1.3L Turbo FI (1989)
2.
Close the hood and test drive vehicle (careful not to pinch the gauge hose when closing the hood). Accelerate hard from approx. 2,500 rpm to
approx. 4,500 rpm in a middle gear, while a passenger/partner observes the pressure on the gauge.
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Gauge should show positive pressure beginning at approx. 4,000 rpm and pressure should never exceed 8.25 psi (57 kPa).
If boost pressure is late, excessively low, or not present, check for the following:
a. Turbocharger bearing failure or turbine/impeller failure or damage.
b. Wastegate stuck open.
c. Air bypass valve stuck open.
d. Clogged air cleaner, or other intake restriction.
e. Restricted exhaust system or catalytic converter.
f.
Exhaust leak at manifold or turbocharger.
g. Intake air leak between turbocharger and throttle body.
If boost pressure exceeds the maximum, check wastegate operation (wastegate may be stuck closed).
TURBOCHARGER - WASTEGATE OPERATIONAL CHECK
1.
Be sure the engine and turbocharger are cool enough to touch.
2.
Remove the insulator covers to gain access to the turbocharger.
Checking Wastegate And Actuator
3.
Connect pressure regulator/gauge as shown in illustration and apply air pressure regulated to 10 psi/69 kPa.
CAUTION:Do not apply air pressure greater than 14 psi (98kPa). Damage to the actuator diaphragm will result.
4.
Check that wastegate lever and actuator rod (linkage rod) moves when connecting and disconnecting air pressure.
If wastegate lever is rusty or sticking, a small shot of penetrating oil may free it.
5.
Reconnect pressure hose to wastegate actuator and recheck boost pressure if necessary.
