MajorCommonEngine

Toyota Supra: Sequential turbo VCV flap actuator and wastegate solenoid failure

Sequential turbo VCV flap actuator and wastegate solenoid failure is a common engine fault on the Toyota Supra on the 1993–2002 cars, and we rate it major. Putting it right costs $300 to $1,200 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 23 documented faults on the Toyota Supra.

Vehicle: Toyota Supra
Engine: 3.0L
Years: 1993–2002
Fuel: petrol
Gearbox: manual
System: Engine

This page covers the Toyota Supra as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Toyota Supra faults23 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Turbocharger yet. We would rather show none than show a picture of a different part.

What goes wrong

The JZA80 2JZ-GTE uses a complex sequential turbo system controlled by vacuum-operated solenoids and a Vacuum Control Valve (VCV) that sequences the primary and secondary turbochargers. The stepper-motor actuator that opens the pre-turbo exhaust bypass flap and the three vacuum solenoids (VSV1/VSV2/VSV3) degrade with age and heat cycles. Failure causes the car to remain single-turbo only, lose boost above 4500 rpm, or produce erratic boost spikes. Solenoids crack internally or clog with oil vapour from the PCV system.

What you would notice

Loss of power or flat spot above 4500 rpm where secondary turbo should spool
Check Engine light with boost-related codes
Boost gauge stays low or spikes erratically
Car feels like it has no top-end despite running well at low rpm

How to check it

Where to look. Intake manifold vacuum solenoid bank (three black solenoids on firewall side), VCV actuator mounted near the exhaust manifold on the driver's-side turbo assembly

With engine warm, watch boost gauge on a hard pull through 4500–6000 rpm — should climb progressively.
Check all three VSV solenoids on the intake manifold for cracking or oil contamination.
Inspect VCV actuator rod for seized or sticky movement.
Scan for stored P-codes related to boost or turbo sequencing.

Parts involved: Turbocharger.

What it costs to put right

$300 to $1,200 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Has the sequential turbo system been serviced or converted to parallel?”
“Has the car ever thrown boost-related codes?”
“Has any vacuum line or solenoid been replaced?”

Now check the Toyota Supra you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Toyota Supra buyer questions

Is sequential turbo vcv flap actuator and wastegate solenoid failure serious on a Toyota Supra?

We rate it major and common on the Toyota Supra. The JZA80 2JZ-GTE uses a complex sequential turbo system controlled by vacuum-operated solenoids and a Vacuum Control Valve (VCV) that sequences the primary and secondary turbochargers. The stepper-motor actuator that opens the pre-turbo exhaust bypass flap and the three vacuum solenoids (VSV1/VSV2/VSV3) degrade with age and heat cycles. Failure causes the car to remain single-turbo only, lose boost above 4500 rpm, or produce erratic boost spikes. Solenoids crack internally or clog with oil vapour from the PCV system.

How much does it cost to fix on a Toyota Supra?

$300 to $1,200 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Toyota Supra years are affected?

Our research records this fault on the 1993–2002 Toyota Supra. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

With engine warm, watch boost gauge on a hard pull through 4500–6000 rpm — should climb progressively. Check all three VSV solenoids on the intake manifold for cracking or oil contamination. Inspect VCV actuator rod for seized or sticky movement. Scan for stored P-codes related to boost or turbo sequencing. Look here: Intake manifold vacuum solenoid bank (three black solenoids on firewall side), VCV actuator mounted near the exhaust manifold on the driver's-side turbo assembly