Oct 192019
 

1979 Toyota Supra

I’ll try to lay this all out as quickly as I can.

I bought the car cheap as a non runner. Actually, it would run, but only for a few minutes and then stall. Starter fluid would get it to run again but only for a few seconds. So it’s a fuel issue. Noid light showed that injectors were firing.

The car had a new fuel pump, so someone already tried that and it didn’t work, and the pump is very noisy. But the filter looked original, so I put a fuel filter on it. That helped quite a bit. The car runs and drives. But when I fill the tank and drive for a bit, the no start condition returns. And the pump is still very noisy. I thought that maybe the plugged fuel filter ruined the new pump, so I put another new pump on, but it too is noisy.

No start is only with a full tank

The no start is only with a full tank. And there is a good bit of pressure in the tank. I was going to check the pick up in the tank again, but as soon as I pulled the return line, pressurized fuel started shooting out. I got the hose back on and took the gas cap off. It vented quite a bit of pressure.

I figured EVAP, so today I drove it for a bit, and pulled the hose off the charcoal canister, but no pressure was released. I took off the cap and a little pressure was released, but not a ton. But the tank is no longer completely full. The gas cap is new, and there is evidence that fuel was leaking from the old cap.

I think that’s it. Thanks in advance for any help.



Does the no start go away if you leave the gas cap off?

Before you mentioned that it only happens with a full tank of gas my thoughts were leaning toward a failing ignition control module. This is a common failure component that tends to stop working when warmed up. Once the car stalls if you let it cool for a while it will start back up.

The next time it won’t start maybe check for no spark condition.

Sep 302019
 

2007 Toyota Rav 4

Its a automatic but the shifter lights that tell me what gear I’m in are not lighting up, same as the dash one, also cigarette lighter and side mirrors have stopped working also.



You state it is a 1974 Toyota Rav4? The first generation in the US was introduced in 1996.  Source: https://en.wikipedia.org/wiki/Toyota_RAV4

Either way, the first thing to check would be the fuse panel for a blown fuse. You can look to see if the fuse is blown or check for continuity across the fuse.

If the fuses are OK, then move on to checking the ground connections. There may be a shared ground connection that would effect all the electrical items no longer working.

Separate Issues

It is possible that the fuse blown may only correct the lighter and mirrors. Then you would look to see if the bulbs for the shifter light are good. Then check the wiring and connections. Finally check for current signal from the selector switch.

Sep 212019
 

2014 Toyota Sienna

Changed rear rotors and brakes and now wheel won’t spin in reverse. Parking brake is engaged in reverse. Replaced all springs/hardware on parking brakes and used PBBlaster to make sure the cable wasn’t getting hung up. Tried to drive the car several times and parking brake is definitely on in reverse. Adjusted the adjustment wheel so that the brakes are compacted as much as can be and the hub spins fine forward but stops immediately when spun in reverse. I even put the old rotors back on thinking that would solve it however still acts the same. In the end, by taking out the adjustment wheel spreader the car works, however I have no parking brake and it will not pass state inspection this month without it. I’m at a loss and feel as if I’ve tried everything.



This may sound odd to you but I have seen this once before. It turned out the brake shoes were install improperly. Let me see if I can describe what was going on. The brake shoe material is a different size for two of them. The actual external shoe (metal part) is the same on all four per say. But there are two that the shoe material is shorter then the other. Looking at just one side with two short shoes or one side with two longer shoes would be hard to notice. And the difference if difficult to notice at all until you set one directly on top of the other for comparison. This would be what I would recommend you check first.

2014-toyota-sienna-parking-brake-shoes

Parking Brake Shoes Replacement

Removal

1. Remove rear wheel and tire assembly.

2. Remove mounting bolts, then separate rear disc brake caliper assembly. Use wire or an equivalent tool to keep brake caliper from hanging down by flexible hose.

3. Remove parking brake shoe adjusting hole plug.

4. Remove rear disc brake rotor.

5. Remove No. 3 parking brake shoe return tension spring.

6. Remove No. 1 parking brake shoe return tension spring.

7. Remove parking brake shoe hold down spring cup and parking brake shoe hold down spring to separate No. 1 parking brake shoe assembly from backing plate.

8. Remove parking brake shoe lever strut and parking brake shoe strut compression spring.

9. Remove parking brake shoe hold down spring cup and parking brake shoe hold down spring to separate No. 2 parking brake shoe assembly from backing plate.

10. Remove parking brake shoe adjusting screw set.

11. Separate No. 2 parking brake shoe return tension spring to remove No. 1 parking brake shoe assembly.

12. Separate No. 3 parking brake cable assembly from parking brake shoe lever with needle-nose pliers.

13. Remove C-washer, shim and parking brake shoe lever from No. 2 parking brake shoe.

14. Remove parking brake shoe guide plate set bolt and parking brake shoe guide plate.

15. Remove parking brake shoe hold down spring pins.

Inspection

1. Measure inside diameter of disc brake rotor with a brake drum gauge or an equivalent tool.

2. If inside diameter is more than maximum, replace rear disc.

3. Measure thickness of parking brake shoe lining.

4. If lining thickness is less than minimum, or if there is severe or uneven wear, replace parking brake shoe assembly.

5. Apply chalk to inside surface of disc brake rotor, then grind down brake shoe lining to fit disc.

6. If contact between disc brake rotor and brake shoe lining is incorrect, repair it with a brake shoe grinder or replace parking brake shoe assembly.

7. Always replace both parking brake shoes together.

Installation

1. Install parking brake shoe hold down spring pins.

2. Apply adhesive to threads of parking brake shoe guide plate set bolt.

3. Install parking brake shoe guide plate and parking brake shoe guide plate set bolt, Fig. 10.Torque bolt to 13 ft. lbs.

4. Apply high temperature grease to areas of backing plate which make contact with shoe.

5. Apply high temperature grease to areas of parking brake shoe lever which make contact with No. 2 parking brake shoe assembly.

6. Install parking brake shoe lever and shim to No. 2 parking brake shoe assembly with a new C-washer,

7. Measure clearance between No. 2 parking brake shoe assembly and parking brake shoe lever, Fig. 17. If clearance is not as specified, replace shim with one of appropriate size.

8. Connect No. 3 parking brake cable assembly to parking brake shoe lever.

9. Install No. 2 parking brake shoe return tension spring to No. 2 parking brake shoe assembly.

10. Apply high temperature grease to parking brake shoe adjusting screw set threads.

11. Install parking brake shoe adjusting screw set.

12. Install No. 2 parking brake shoe assembly to backing plate with parking brake shoe hold down spring cup and parking brake shoe hold down spring.

13. Install parking brake shoe lever strut and parking brake shoe strut compression spring.

14. Install parking brake shoe assembly to backing plate with parking brake shoe hold down spring cup and parking brake shoe hold down spring.

15. Install No. 1 parking brake shoe return tension spring.

16. Install No. 1 parking brake shoe return tension spring.

17. Install No. 3 parking brake shoe return tension spring.

18. Verify that each component is installed properly.

19. Install rear disc brake rotor.

20. Install parking brake shoe adjusting hole plug.

21. Install rear disc brake caliper and mounting bolts. Torque bolts to 65 ft. lbs.

22. Install rear wheel and tire assembly. Torque hub nuts to 76 ft. lbs.

23. Bed in parking brake shoes to discs as follows:

a. Drive vehicle at about 31 mph on a safe, level and dry road.

b. Depress parking brake pedal with 33.7 lbs. of force.

Aug 202019
 

Toyota Sienna

I purchased this van in 2016 from an older couple and noticed that there was a slight hesitation with the automatic transmission when shifting from 2nd to 3rd. After changing the trans fluid and filter to 100% synthetic it improved.
Lately I’ve noticed there is a greater hesitation when cornering.
Is this solely transmission issues or could there be another problem, such as the drive shaft bearing or joint?



Most likely just transmission related since you did see a change in the transmission function when you changed the fluid and now it is showing similar signs. The best approach would be to see if there are any transmission codes stored in the computer that may indicate otherwise. Possibly a failing wheel speed sensor, etc.

Aug 172019
 

My Air Conditioning isn’t working right. If I start it when it’s relatively cool outside, like 75 degrees, it’ll blow ice cold. If I then continue to the desert where it’s 105 degrees, it’ll still be blowing ice cold. BUT, when I leave it in the desert for a few hours where it’s 105 and come back and turn it on (when now it’s very hot outside and inside the car), the AC will not blow any cold air. It’ll blow like 98 degree air, not any cooler. As I drive back towards cooler outside temps, then it’ll start to work again. It’s all very strange, not to mention uncomfortable. Any ideas? A couple months ago I had a new condenser installed from damage to the old one. I’ve already tried replacing the relay.



This is common to a failing mode/blend door actuator. The actuator is a tiny electronic device that opens and closes the doors inside the ventilation system. This allows it to switch from hot to cold.

When the vehicle sets, heat and moisture tend to affect these components. And when first put in use after setting they have a harder time functioning properly.

Source Article:

Why is the air conditioning blowing hot? – SOLVED

Jun 132019
 

2008 Toyota Yaris

My Yaris is very under powered and is consuming a lot of fuel.
When cruising in 6th gear changing down to 3rd or 4th and flooring it provides almost no extra acceleration at all even well into the torque band, the engine revs as it should but the power is simply not there, the engine itself also sounds a bit rough, like a faint scratching noise when accelerating hard. The fuel consumption has increased by 2 litres for every 100km. (I’m from South Africa, sorry for the metric units).

It has 400 000 km on it. No check engine light comes on whatsoever. I’ve replaced spark plugs, oil, filters and cleaned the MAF sensor. The exhaust system has been checked for leaks and there are none.
I’m trying to look at any other cause before taking the car to have the engine rebuilt. Do you have any suggestions as to what could be causing low power with high fuel consumption?



The Top 5 Causes of High Fuel Consumption in Petrol Engines

Below are the top 5 causes of high fuel consumption for vehicles with petrol engines.

  1. Carrying Excess Weight – One simple cause of high fuel consumption is when a vehicle is carrying too much weight, whether it has a lot of items in the trunk or in a trailer that it’s hauling. The more weight that’s being carried around by the vehicle, the more demand that is being put on the engine to generate enough power to move all of it. Whenever the engine must generate more power, it needs to burn more fuel in the internal combustion process. Therefore, you end up having to pump more gas because the vehicle uses more gas to satisfy its power needs.
  2. Bad Spark Plugs – When spark plugs get worn out, you will have a lot more engine misfires with your vehicle which will use up more fuel. You need to be sure to use the best quality spark plugs possible, so you can get the most miles out of them. Iridium spark plugs and platinum spark plugs are the two most preferred types.
  3. Dirty Air Filter – There are many reasons to have a clean air filter, but one big reason is to have a strong fuel economy. If your engine is filled with dirty air, then its internal combustion mixture won’t create as much power for the engine. This means it’ll use up more fuel just to perform the most basic driving needs. So, remember to change your air filter regularly.
  4. Low Tire Pressure– The tires on your vehicle need to be inflated to the proper amount of air pressure, usually between 32 PSI and 34 PSI on the majority of economy cars. If you’re driving a vehicle with low tire pressure on any or all the tires, it creates more wear and resistance for those tires. This causes the engine to work harder to make up for the pressure loss, which means more fuel will be used to power the engine for this purpose.
  5. Bad Oxygen Sensors – Your engine has oxygen sensors which keep track of the mixture of air and fuel in the internal combustion chamber. Based on what it senses, it tells the powertrain control module to either take away fuel or add fuel. But if the oxygen sensor does not work properly, the system will automatically add more fuel even if the engine doesn’t need it.

Source: https://oards.com/causes-of-car-high-fuel-consumption/

May 032019
 

prado-bumper

I would like to know if it is necessary to replace the Front Bumper Guard for my car. It was damaged and if the guard is not necessary I would just take it off. I have seen other Prados without this guard. I bought this car used and did not put it on.

Awaiting your reply,



No. You do not have to attach the bumper guard if you choose not to.