So... truck has been running pretty good as of late, and i thought I had most of the minor things fixed from buying a used truck...

Was idling at a stop light 2 days ago (first day of super cold weather here, 10f) and the truck started running rough. I had to drive about 15 miles up the mountain for a job interview, so I did that. Made it up and back home ok, but the truck was shaking and just didnt feel right.

Parked it when i got home and could tell it was misfiring. I proceded to pull the spark plug wires while it was running and noticed #2 cyclnder was indeed not firing.

Got new plugs and wires, installed them, with no improvement. I also verified that I had good spark on all the new plugs (everything is sparking fine). Notice I can hear somethin in the valves that doesnt sound quite right.

Also notice that when I was testing things I could smell much more fuel from the exhaust then normal.

I am recently out of work and pretty much broke, so I am trying to avoid going to a local mechanic if at all possible.

My question is what other sort of things should I be troubleshooting givin the symptoms I am having. I have no garage so I don't want to risk opening the valve cover (its very windy here i dont want debris to blow into it).

I am worried it is a valve issue such as a bent rod or ??? but I have no idea what else to do. Trying my best to learn to work on my own rig, but my automotive experience is lacking.

Thanks for any ideas.

 

btw, 190k miles on the engine, 22re 1991 4wd.

 

Hey, D. I think the exhaust valve is stuck open from what you're describing. With the valve open, there's no compression and consequently no detonation in that cylinder. I've got a compression tester if you want to check. It's probably just a stuck lifter you can free up with some sea foam via the intake. Drive it easy and try keep your rpm low until it frees up.

 

compression tested 120ish

ran fin when revved in park.

misfire when revved under load (in drive, break applied)


im thinking injectors?
distributor?
vacuum leak?

would love to hear anyones thoughts on how to move forward.

 

place a stethoscope at #2 injector to hear if the injector is functioning. It should tic or click when operating.

 

thats for the awesome idea. i will try to do that tomorrow if i can find a stethoscope to use. I am enjoying learning all these tips and tricks from those who are helping me. It is always great to learn and using a stethscope to pinpoint sound seems like such a great way to go about checking for one function of the injector.

 

To see if number 2 is firing, https://www.yotatech.com/forums/f116...t-22re-270857/ if it isnt firing, I would suspect the injector or the crimp to the injector. It is a poor design in the wiring harness.

The crimp is located in the dip of the wiring from the inner fender to the intake manifold area.

 

You can also use a long blade flat screw driver by placing the blade on the metal body of the injector and putting your ear on the handle end and you can hear the tic/click.

 

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thank you

 

bad injector ended up being the problem. it has been replaced.