Mercury Repair Questions? Ask a Mechanic for Answers ASAP
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Have you also replaced the spark plug wires?
I have also replaced the pcv valve
You have a problem in your ignition system and you have covered everything else. If you replace the wires it should fix your problem.
I have a 98 jeep wrangler and it had a very simliar problem and i replaced the egr valve, it fixed the problem. I'm not sure what the egr valve does. Do you think thats a possiblity? The 1995 mercury does not jerk all of the time, but for the most part it does.
If your EGR valve was the cause it should set a check engine light.
We will try the new spark plugs wires. If this doesn't fix the problem, will i be allowed to ask more questions?
Yes you can no problem I will close the live chat session and you can pick it up when you like.
I changed the spark plugs wires in the car, and that did not fix the problem.
I changed the spark plugs wires in the car, and that did not fix the problem. The car still jerks when going down the road.
What should I try next???????
It used to be just once in a while, but now it seems like it jerks most of the time. The fluids have all been checked.
It has to be the ignition system if it is missing under a load. We just have to find out what the cause is.
The best for your car. I was wondering because I have had trouble with other brands. Disconnect the vacuum line to the egr valve and road test the car again see if the miss goes away. I have had the ports plug up and dump all the egr flow to one or two cylinders causing a miss.
I took the vacuum line off of the egr valve, and its running fine, but sometimes it will run fine, so I don't know if this is the problem. No check engine light has come on yet.
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I have the EGR valve on the top of the engine like the second drawing. So I'm guessing the EGR Valve is the part that needs to be replaced, as I was thinking from the very beginning of these questions!