20 Most Recent 1997 Toyota Previa - Page 3 Questions & Answers

Which pressure control valve? Oil? Fuel?

Near or behind the glovebox (right hand drive)

Check First the crankshaft sensor.2 Coil new one.3 IGF

This can come from the suspension or the drive section but it is best to check if the fault is seen on the road or even while it is idling.if so the exhaust must be checked as a low idling can make the exhaust tap on the sides , specially the muffler or the exhaust pipes.If an inspection is done on the bottom side it will reveal the case.if not check the suspension and drive.

yes cams are at front with the timing belt. not like motorcycles in the middle. I havent had many problems with them where I am. But a water loss in the engine is serious. If your sure the loss is internal then you have to tear down.

You should check tires for uneven wear,wheel bolts. Also loose parts in suspension.

The fuses are in 2 places on the Previa but the majority are under a large panel in the middle of the dash. Just above the hazard light switch (to the right of the fan speed switch) under the foremost edge of the panel is a button that you push up on as you lift the panel. Under the panel you will also find the front speakers.

This is somewhat a difficult procedure. to work on this, you must lift the vehicle. The water pump is located on the front part of the engine, which can only be accessed from beneath the vehicle. A unique accessory drive shaft must be removed to access the water pump and thermostat!! This is about a 4-5hr labor!!

Hi,

If the coolant is full, and it overheats like this.it is likely the radiator is partially blocked, not allowing it to cool to its full potential.In this case, the radiator would have to be replaced.I would also suggest replacing the thermostat at the same time.Make sure than the fans are running properly. If you might have observed white smoke, the most likely cause is a blown headgasket or a cracked cylinder head which means major engine repairs are needed or at least the headgasket replaced, these heads are known to crack so if the head is removed have it checked for cracks.


Let me know,if needed further assistance.

Hope i helped you.

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It's the same fuse that powers the DLC (Data connector). Pop the cover top center of the dash board and check for power between pins 8 and 16 on the DLC

Torque sequence: ----------------- there are two rows of fasteners and you need to start with the middle 2 fasteners first and then work your way toward the front and back in steps. Step 1: torque head bolts #1,2,3,4,5,6,7, & 9 in sequence to 10 Ft/Lbs Step 2: torque head bolts #1,2,3,4,5,6,7, & 9 in sequence to 20 Ft/Lbs Step 3: torque head bolts #1,2,3,4,5,6,7, & 9 in sequence to 29 Ft/Lbs Step 4: turn all head bolts in sequence an additional 90 degrees Step 5: turn all head bolts in sequence an additional 90-degrees recheck final torque in sequence. Fasteners are supposed to be replaced if they are removed since they are torque-to-yeild fasteners.

7 - 5 - 1 - 3 - 10
front
9 - 4 - 2 - 6 - 8

bad sensor

ive undone all nuts, including cam wheel nut but its stuck. the pump turns slightly side to side , but it still seems to be fixed to the cambelt pully. ive tried using a drift on the pump shaft but it doesnt move back

yes no problem the only difference is the temperature range ,one is spec J1703 and the other is spec j1704 ,its the resistance to high temperature vaporisation but the actual fluid is the same just a bit more additive thats all .

On the fuse there is number and beside the fuse it will be mentioned for what part this fuse is for..As per that ,it indicates what fuse it is and it controls what part in the car.Do you notice problem with any part of the car not working after the fuse blows.Also try fitting 30a fuse instead of 20 a and then check,if this is helping.also it can be ECM related problem.The ecm means electronic control module.Also called cars computer.Its located beside the car battery under the hood.Disconnect the ecm and check,if the fuse stops blowing then its ecm related fault.But with the ecm disconnected,the fuse is still blowing out,then there is short in the wirings.Its a electrical short.Also there is a 20 amp fuel pump fuse in the engine compartment fuse box.Get the fuel pump wiring and connections.Also check the fuel pump relay.The relay is is in the same fuse box,but its under the fuse.-----------Check out.Keep updated.Thanks.

Hello. Welcome to FixYa. I am Toyota Ed; I will be assisting you today.

The differences 'side by side' are negligible. The main difference, one that you really cannot determine by the eye, is the size of the combustion chamber. On a supercharged Previa, the compression ratio is markedly lower, because of the supercharged air being sent into the engine. The combustion chamber on a supercharged engine is slightly larger, and the piston domes are shorter.

Note: All turbo and S/C engines have lower compression ratios than a normally asperated engine.

In short, putting a supercharged head on a normally asperated engine will give you very bad acceleration and drivability, due to the increased combustion chamber size. The lower compression of the S/C engine's head on a normal engine will have bad idle, poor acceleration, and bad hesitation.

To tell the difference, you need both variants of cylinder head, and measure the cubic centimeters of the combustion chambers with a liquid. The one that holds more volume is the S/C head.

Thanks for choosing FixYa for assistance today. I hope that my answer helpd you out.