Please Help!! vehicle is not running right, barely running.?

I have a 1995 Chevy Blazer with a 4.3 liter engine that started idling rough, then the service engine light came on a couple of times. The service engine light is off now, seems to reset once vehicle is turned off %26amp; back on, so I can't get a reading. Now it keeps dying at slow speeds, does better at high speeds. I tried gas treatment %26amp; that seemed to help for about a day. I have replaced fuel filter. Thinking maybe Oxygen sensor or fuel pump. I don't think it has a EGR valve. I have changed out upper %26amp; lower radiator hoses, heater hose, thermostat, anti-freeze %26amp; belt. 2 freeze plugs were bad. Just got this vehicle a few months ago, as is. The radio had been pulled out %26amp; had to rewire vehicle because of the way they removed the anti theift device. Can't afford another vehicle, but can't keep pouring money into this one. Could it be plugs %26amp; wires? Please help with any suggestions you might have. Trying to fix it myself.
Please Help!! vehicle is not running right, barely running.?
yea, its got a egr valve, maybe its all carboned up. i would try a new set of plugs and wires to start out with, maybe a new cap and rotor too, also something else will do that too, clean out the throttle body inside.i know exactly what you mean about cant afford another vehicle, iam the same way. i would try those things and maybe throw a timing light on it too, if its possible.
Please Help!! vehicle is not running right, barely running.?
it is most likely an o2 sensor
you might check the speed sensor
Have you looked at your air filter? kinda small but could be the cause..
some times it is cheaper to have one repaired than it is to just keep changing unnecessary parts trying to fix one. You might want to have a diagnostics check run own it. this might cost you 30-50 dollars but may end up saving you money in the long run good luck
sure it could be.... guessing you need to get your self a book and learn more... dont guess fuel pump if its bad its bad you will know it it will not run at all..... does sound like fuel maybe put im not there to listen so plugs could be.. and really plugs and a oil change is the first thing i do when i get a new car to drive thats just a give me thing.. not knowing who or when they was done last... make that the first thing to replace when starting over... so your kind of working backward.... you should have giving it a good tuneup when you got it and a oil change...... go have a scan run on it and you might fine the problem then fix it
as old as the vehicle is check timing chain, if it's ok, change the MAP sensor ,TPS sensor, ldle control valve, and a tune-up don't give up now your almost there Good-Luck

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