1990 Toyota 4Runner no injector Pulse

BATOSAI69

MEMBER
1990 TOYOTA 4RUNNER

Engine Performance problem
1990 Toyota 4Runner 4 cyl Four Wheel Drive Automatic

vehicle ran, went out a couple months later and had no injector pulse. Has fuel delivery to rail, and spark but no pulse, was told to check injectors and they are hot on both sides key on. Keep in mind that the vehicle ran fine when parked then this occoured was told maybe comp. Please help.

4 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there,

If you have no injection pulse, this will not be a compression problem I would be checking for fault code and a possible faulty cam or crankshaft position sensor.

Mark (mhpautos)

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Saturday, May 17th, 2008 AT 10:33 PM

BATOSAI69

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11 POSTS

By comp I actually meant computer problem. And would I still have spark with a cam or crack sensor issue?

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Sunday, May 18th, 2008 AT 6:31 PM

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there.

The sensors are the primary trigger to tell the ECU to fire the coil. So if you have a faulty sensor you will have no input signal to the ecu and this could be the problem you are having. The ECU will set a code if it is not getting any input from the sensors, so if no code check coil voltage supply as well.

Mark (mhpautos)

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Sunday, May 18th, 2008 AT 6:41 PM

BATOSAI69