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you might have a short in the electrical system

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Q: What could cause the EFI fuse to blow and knock the computer out on a 1990 4 Runner?
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Related questions

What can happen if a knock sensor is bad?

the motor could pre-detonate or "knock" that can cause damage


What could happen if the mother dog misses an lie down on the puppy?

she could knock all the air out of it and cause it to die


Would a bad torque converter cause the motor to knock?

No, it will not cause the engine to knock.


95 mystique code225 no knockwhat do you check to repair?

Do you mean the knock sensor? It's a device that detects engine knock so that the computer can retard the timing. If the knock sensor isn't functioning, it could be a connector or the sensor.


What problem could the knock sensor cause on your car?

If the knock sensor failed the CEL (Check Engine Light) would be illuminated and the engine may "ping" or "spark knock" under load. Serious "spark knock" can damage the engine if allowed to continue.


Can a bad knock sensor cause the car do start bad?

A knock sensor assures that you're getting as much power and fuel economy as is possible from your engine. More details: A knock sensor allows the engine to run with the ignition timing as far advanced as possible. The computer will continue to advance the timing until the knock sensor detects pinging. At that point the computer retards the ignition timing just enough for the pinging to stop. The knock sensor responds to spark knock caused by Pre-detonation of the Air/Fuel mixture. As the flame front moves out from the spark plug ignition point, pressure waves in the chamber crash into the piston or cylinder walls resulting in a sound known as a knock or ping. This is caused by using a fuel with a low octane rating, overheating, or over advanced timing. Sometimes it can be caused by hot carbon deposits on the piston or cylinder head that raise compression. A knock sensor is comprised of Piezoelectric materials; Crystals that when impacted, generate a voltage (same idea as a BBQ ignitor). This voltage is monitored by the computer, and when an irregularity is detected, the computer corrects timing in VVT (variable valve timing) engines, or triggers a DTC Diagnostic Trouble Code) in older vehicles.


Can knock sensor cause spark knock?

yes when it is not working properly


What could cause a 2000 ford contour's engine to knock?

Rod or main bearings. Those are located on the crankshaft.


How do you do unconscious?

you have oo knock your head on something hard and pass out this could cause notcia(pronounced nor-zi-a)


Could a manifold gasket leak cause an engine knock?

No, knocking in an engine is normally more serious than a gasket leak. Depending on how heavy the knock sound is it could be the Big Ends bearings need changing or it if its fainter than that it could be the timing is out. Either way it can cause real damage to the engine and should be repaired as quickly as possible. Have seen exhaust manifold gasket leaks that are described as a 'knock' by inexperienced persons. Normally a knock is piston connecting rod bearings that have gone out.


What is the 2002 avalanche knock sensor?

The knock sensor sends a voltage pulse to the computer whenever it detects the vibrations caused by metal, such as the conditions caused by the spark knock. When the knock sensor sends a voltage pulse, the computer retards the timingin an effort to stop the spark knock.


Can you tackle a runner by tripping?

Not sure exactly what you're asking, but yes, you can knock a runner over by tripping into them. All it really takes is a hard shove, because a runner's feet rarely touch the ground at the same time.