@22R -TE ignition timing

[JVS]

Can anyone help me with a ignition timing question. I replaced the head on an 86 toy 4x4 turbo with rebuilt head (Head gasket went bad and cracked head due to water). Put the crank at 0 degrees TDC and marked cam and chain when removing head. After new head was installed made sure it was at 0 degrees TDC and put in distrubtor so it was pointing to #1 wire. Timed truck to 5 degress BTDC and truck ran but had no power. Found that when I advanced the timing say to 12 degress BTDC it was much better. Then moved to say about 20 degrees and truck seemed to run pretty much normal. Does anyone know what might have happened?

[87_SR5]

Originally Posted by JVS

Can anyone help me with a ignition timing question. I replaced the head on an 86 toy 4x4 turbo with rebuilt head (Head gasket went bad and cracked head due to water). Put the crank at 0 degrees TDC and marked cam and chain when removing head. After new head was installed made sure it was at 0 degrees TDC and put in distrubtor so it was pointing to #1 wire. Timed truck to 5 degress BTDC and truck ran but had no power. Found that when I advanced the timing say to 12 degress BTDC it was much better. Then moved to say about 20 degrees and truck seemed to run pretty much normal. Does anyone know what might have happened?

When you adjusted the timing at first (to 5 degrees BTDC), did you short circuit the check connector plug located under the hood? By short circuiting two certain ports on the plug, this disables the electronic advance (controlled by the computer). Then you set you timing to 5 degrees BTDC and then take out the wire you were shorting it with. This will turn the advance back on and you should be good to go.

At idle, the truck should run at 12 degrees BTDC (I think)....this is with the electronic advance enabled. Then when you disable the electronic advance, it will drop the timing to 5 degrees

I think this may be your problem....

Hope this helps...

[JVS]

Yes, I did short the terminal. When the timing is set that way is runs terrible. By advancing it to approx. 20 degrees it runs good.

[87_SR5]

Originally Posted by JVS

Yes, I did short the terminal. When the timing is set that way is runs terrible. By advancing it to approx. 20 degrees it runs good.

And the electronic advance is working (the engine changes speeds, or sounds different, when you short the terminal)?

Does the engine idle bad when it is set to normal timing....5 degrees w/ terminal shorted, 12 degrees unshorted?


I don't know what it could be...hopefully someone else will help out

[Smoke]

The electronic timing advance is probablly not working!!