Top 10 1990 Toyota 4Runner Questions & Answers

Destyne,
It seems the image sent gets distorted and not readable. It could be the formating process. If you give me your e-mail address I can send you a clear diagram directly. Unless you have an idea on how I may upload the diagram in clear format.
Thanks,
Jlikukel

hi  here is the whole diagram at this address http://www.birfield.com/~morgan/tech/FJ55LG.gif

Look first right rear back under fuel tank,< If not, follow fuel lines from fuel tank one main line, one return line, traveling parallel to frame all the way to the motor compartment on front, can be front under right passenger side, first by the filter at the auto parts, that way you will know what to look for

http://www.troublecodes.net/Toyota/

List of Codes for OBD-I

keep on :-)

hi ben
my answer would be yes i would wory about it...
Guages are put on vehicals for a reason not just for looks i would have the car hooked to a diagnostic center and checked even though the guage may be faulty but i wouldnt take a chance

Hi do this first in this order:

1. Locate your fuse box. ( should be under the drivers steering column or under the dash ect).
2. Usually there is a diagram on the fuse box cover. (usually in Japanese)
3. If you can't speak Japanese, that's fine just go through every fuse in the fuse box and inspect them all
4. Replace burnt out fuses with an identical amp match. (eg burnt 10amp fuse replace with new 10amp fuse). Simple.

Warning do not replace a burnt out fuse with a higher amp fuse as this may cause a fire.
If you continue blowing fuses all the time then there is something not right.
A lose positive wire may be arcing out to negative earth (car body). And causing you to blow fuses.
Its a process of common sense and elimination that will fix this problem.
Let me no how you get on.

Jules...

Check this wiring diagrams...

Fig. 23: Engine wiring-22RE 1989-92 4Runner and 1989-90 Pick-Up


Fig. 24: Engine wiring-6-cylinder 1989-92 4Runner and 1989-90 Pick-Up

Good luck.

Have you looked at your idle air control valve What is it? This is an electrically driven valve that allows additional control over the throttle at idle Where is it located? The IAC is located on or adjacent to the throttle body and consists of a small device held on by two bolts with an electrical connector.
How does it work? When the throttle is closed the throttle plate closes off any air from the intake manifold. In order to stop the engine from stalling due to lack of air the IAC opens a small valve allowing air to pass from the air ducting to the intake manifold. Often the IAC components consist of an air inlet port in the inside wall of the throttle body, immediately in front of the throttle plate, with a similar exit port behind the throttle plate. Connecting the two ports is a motor driven valve. When the valve is opened air effectively by-passes the closed throttle plate to maintain the engine at idle. The IAC also augments the throttle when additional power demands are put on the engine such as steering.


Symptoms of faulty IAC

• Poor starting: If the IAC fails to open or the inlet/exit ports are clogged shut with carbon the engine may start and then promptly stall. The engine can be kept running by pressing the accelerator. However any additional demand on the engine such as power steering or putting the car into drive (automatic) will cause the engine to stumble badly and often stall.
• Engine cut out: Even with the engine warmed when the vehicle is stationary such as at a red light the putting of the transmission into of 'drive' to pull away before the accelerator is pressed can cause the engine to stall. (Note this differs from the TPS fault which causes engine stall due to the accelerator being pressed too quickly)

The fuel pump relay is located on the right side to the right of the glove box, remove the right side kick panel it is located behind it up high.

Bad carb or fuel injection issues- the system is fuel rich (black smoke) and also fuel rich system can make the idle low. Many things can cause this but thses are just a few.