Mechanics

TRUCK WOULD NOT START THIS MORNING

1985 Toyota Pickup

Electrical problem
1985 Toyota Pickup 4 cyl Two Wheel Drive Automatic 296000 miles

I have a 1985 Toyota that is in great shape.

Yesterday I noted that it too a long time to start-up.

I tried to start it this morning and it kept turning over.

I put some gas in the carburetor to see if there might be a fuel issue.

I had to go to work so I had to leave it.

Could it be a coil or distributer issue?

What is the best way to test it?

I have a 4 month old timing chain on so I am sure it did not jump time.
Avatar
Willjamu
August 12, 2008.




To see if it is firing pull a spark plug out and ground it to the engine( leave the plug wire on the plug) have a helper start the truck while you look at the plug. You should see a bright blue spark. If you do see a blue spark then start looking at the fuel system.

Come back with your results.

Tiny
Rob2008
Aug 12, 2008.
No spark.

Sounds like a coil.

What is the easiest way to diagnose for sure before just replacing parts.

Tiny
Willjamu
Aug 13, 2008.
Yes you can test it with a ohm or multimeter .

Go to this web address for directions and it also has a diagram .

http://www.2carpros.com/articles/mitchell1eautorepair-car-repair-manuals

Tiny
Rob2008
Aug 14, 2008.
Well

I just took a chance and installed the coil.

Turns out this is not the issue.

Still no fire though.

I need to be a little more analytical now.

Some other diagnostic tips.

Tiny
Willjamu
Aug 15, 2008.
Have you tested the pick-up coil (also known as signal generator)>?It's located in the distributor .


http://www.2carpros.com/forum/automotive_pictures/181498_pickup_coil_1.jpg


Remove the distributor cap and ignition rotor.(1) Check the air gap between the timing rotor spoke and the pick-up coil. When aligned, the air gap should be 0.008-0.016 in.. You will probably have to bump the engine around with the starter to line up the timing rotor.(2) Unplug the distributor connector at the distributor. Connect one wire of the ohmmeter to the white wire, and one wire to the pink wire.

The resistance of the signal generator should be
130-190

Also inspected the rotor for burns or cracks .


http://www.2carpros.com/forum/automotive_pictures/181498_rotor_1.jpg


Tiny
Rob2008
Aug 15, 2008.
Looks like the problem.

I appears to be a Toyo Distributer.

Do you need to remove the distributer to replace the pick-up coil?

Tiny
Willjamu
Aug 20, 2008.
No you don't have to remove the distributor .Just remove the two Phillip screws. in the pic there circled in black .


http://www.2carpros.com/forum/automotive_pictures/181498_111_1.jpg



3. Turn the engine using a socket wrench on the front pulley bolt until the projection on the pickup coil is directly opposite the signal rotor tooth.

4. Get a non-ferrous (paper, brass, or plastic) feeler gauge of 0.30mm, and insert it into the pick-up air gap. DO NOT USE AN ORDINARY METAL FEELER GAUGE! The gauge should just touch either side of the gap. The permissible range is 0.20-0.40mm.

The air gap on all 1987-88 engines is NOT adjustable. If the gap is not within specifications, the distributor must be replaced.


http://www.2carpros.com/forum/automotive_pictures/181498_signal_rotor_1.jpg


5. If the gap is either too wide or too narrow, loosen the two Phillips screws mounting the pick-up coil onto the distributor base plate. Then, wedge a screwdriver between the notch in the pick-up coil assembly and the two dimples on the base plate, and turn the screwdriver back and forth until the pick-up gap is correct.
6. Tighten the screws and recheck gap, readjusting if necessary.
AD

Tiny
Rob2008
Aug 21, 2008.
Thanks for all of the tips.

I am back in business.

It turned out to be that the distributor need to be re-wired.

Tiny
Willjamu
Sep 9, 2008.
No prob.

Tiny
Rob2008
Sep 10, 2008.

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