1990 Toyota 4Runner Q&A
1990 Toyota 4Runner Question: check eng light
Don't check it, replace it. it is very common on these. The tough thing is that it is buried under the intake manifold. If you go as far as removing the manifold, you may as well replace the sensor. Be sure to check the wiring to make sure it is not chafed etc. - dandd
Don't even check the harness that goes to the knock sensor, it is a short harness, inexpensive and gives a lot of problems on this engine. Replace the short little harness and sensor dealer normally has the harness in stock, sensor may be available cheaper from www.rockauto.com or another source. - patrick mannion
most like other cars you cant check it because it is electrc part just change it and reset your computer buy taking the battery turminal off for 10 min and put it back on thin it should work - Visitor
Check eng and two VSC lights on. Mechanic replaced O2 sensor and all lights off. Drove for two days and VSC lights came back on. Mechanic says more testing required at additional expense to diag...
So I disconnected (neg./pos.) battery cables to cancel check eng lt. Then reconnected cables (pos/neg). Check eng lt is OFF. Vehicle is running fine past 2 wks. Can I rest assured prob. is fixed? O...
THANKS TO FERNANDO FOR PREVIOUS ANSWER.MY PROBLEM STARTED AFTER PARKING ON A STEEP INCLINE WITH LESS THAN 1/8 TANK OF GAS.VEHICLE RUNS GREAT.I'VE CHECKED VACUUM HOSES,GAS CAP,OIL CHANGE,NEW AIR FIL...
The noise sounded like a Diesel engine. When I turned off my car then turned it back on it made an awful noise and had trouble starting. It just started tonight while driving on a surface street.
when the EFI sends a signal to the cor Does it go to the computer first be fore starting th fuel pump ???