Junkers88

In my never ending quest to find and fix all my 22re problems I've now found a new one.

I started the diagnosis all over again this morning by starting the truck and trying to guess why it was running like it was. So lets start with spark. I pulled each wire off of it's respective plug one at a time and numbers 1,2 and 3 made a noticable change in the idle (it got worse) number 4 however produced nothing. Not the slightest change in idle. So it looks like number 4 isn't firing. The plugs, cap, rotor, wires etc are all new.

Will a spark plug just stop working?

Thanks in advance guys. I'm trying to avoid tearing into this thing to adjust the valves if I can help it.

toytech76

check your valve adjustment. Its really easy to do. If thats the problem and you let it go, it can burn a valve. Factory settings are .008 for intake and .012 for exhaust

thook

Sounds like an injector ain't squirtin'.

Junkers88

It has GOT to be the valves. I replaced the injector and there's no change so now I have a spare.

I'll have to let the truck cool off and start pulling the valve cover off. God what nightmare...........

dcg9381

Put the plug into the wire, does it fire?
If so - check compression on that cylinder.
If good compression, verify injector signal at the plug.

Junkers88

Yes it fires.

Compression at 150 just like the other three cylinders

Injector signal? I've got a meter so tell me how to check it.

Thanks.

thook

Complete instructions:
http://personal.utulsa.edu/~nathan-b...31injector.pdf