Hi All!

I have a 88 B2 with a 2.9. I'm getting codes 41,86 and 89 with KOEO.

I've seen alot of posts mentioning pinpoint tests and was wondering if someone could e-mail the pinpoint tests for these codes.

I've replaced plugs, wires, cap and rotor, etc. and the truck is doing much better but it's still got a miss in it i'm trying to fix.

Going to recheck timing (dist. was pulled out before i bought) and hopefully do the pinpoint tests tonight.

e-mail is talasan@charter.net

Any help is greatly appreciated.

Thanks in advance,

- Tim

 

Welcome to FTE Tim!!!

You have mail.

 

Thanks very much Ken!

Today I've rechecked timing, installed a new H2 sensor and did a compression check on the cylinders.

compression on each cylinder was between 140 - 150 psi. as i removed the plugs (just installed Saturday) for the compression test i noticed the plug on the #5 cylinder was slightly glazed but unburnt. it almost appeared new except for the slight glace like someone put a clear coat on it. as i was reinstalling the plugs i made sure #5 was firing (it was). i restarted the truch and removed the plug wire for #5 from the dist. cap and there was no effect on the engine at all.
so i've traced it to #5 being dead.

with it having 150 psi compression and getting good fire all thats left is fuel. Tomorrow i'll begin troubleshooting the injector and see where that leads me.

anything anyone else can think of??

Thanks for all the help and the Pinpoint tests.

This forum is a life saver.

- Tim

 

Sounds like your on the right track, try swapping the injector to another cylinder and see if the no-fire follows it.

 

Found the injector unplugged. I couldnt see that the wires were off untill i pulled the upper intake.


reinstalled upper intake and plugged the injector up and she runs like new.

Thanks for all the help!

- Tim

 

Glad to hear you found the problem!!