94 toyota tercel. service engine light on and also idles rough, gets poor fuel economy, and sometimes dies when put into drive or reverse. Now that I know where the OBD hook up is and that OBD I only catches system failures. Is it worth pulling the code? Would OBD I capture the issue ?
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Improving fuel economy is easy - just take it easy. It willmake your vehicle last longer, too. Here are some specific tips on how to savemoney on both fuel and repairs.
Keep your tires inflated at the correct pressure. Under-inflation causes tire wear and wastes fuel.
Do not carry unneeded weight in your vehicle. Excess weight puts a heavier load on the engine, causing greater fuel consumption.
Avoid lengthy warm-up idling. Once the engine is running smoothly, begin driving - but gently. Remember, however, that on cold winder days this may take a little longer.
Keep automatic transmission selector lever into "D" when engine breaking is not required. Driver with the selector lever in "4" will reduce the fuel economy. (This is referring to vehicles with Automatic drive)
Accelerate slowly and smoothly. Avoid jackrabbit starts. Get into the high gear as quickly as possible.
Avoid long engine idling. If your have a long wait and you are not in traffic, it is better to turn off the engine and start again later.
Avoid engine lugging or over-reversing. Use a gear position suitable for the road on which you are traveling.
Avoid continuous speeding up and slowing down. Stop-and-go driving wastes fuel.
Avoid unnecessary stopping and braking. Maintain a steady pace. Try to time the traffic signals so you only need to stop as little as possible or take advantage of through streets to avoid traffic lights. Keep a proper distance from other vehicle to avoid sudden breaking. This will also reduce wear on your breaks.
Avoid heaving traffic or traffic jams whenever possible.
Do not rest your foot on the clutch or break pedal. This causes premature wear, overheating and poor fuel economy.
Maintain a moderate speed on high ways. The faster you drive, the greater the fuel consumption. By reducing your speed, you will cut down on fuel consumption.
Keep the front wheels in proper alignment. Avoid hitting the curb and slow on rough roads. Improper alignment not only causes faster tire wear, but also puts an extra load on the engine, which, in turn, wastes fuel.
Keep the bottom of your vehicle free from mud, etc. This not only lessens weight but also helps prevent corrosion.
Keep your vehicle tuned-up and in top shape. A dirty air cleaner, carburetor out of adjustment, improper valve clearance, dirty plugs, dirty oil and grease, breaks not adjusted, etc. all lower engine performance and contribute to poor fuel economy. For longer life of all parts and lower operating costs, keep all maintenance work on schedule, and if you often drive under severe conditions, see that your vehicle receives more frequent maintenance.
A clogged fuel injector would make the engine shake, and your power would be compromised.
Whe you changed the plugs, did you put Toyota plugs in, or a different brand? More often than not, using any other plug than plugs bought at a Toy dealer can make the engine run worse. The engines are designed with a specific plug. Also, replace the wires if they are older than 5 years.
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