I have a 1989 old regency with a 3800 engine v6. It has not been running right for a few days now and we changed the plugs and the fuel filter. I have been told that the ignition modgual may be the problem because it would run good when it was cool in the mornings but rough in the afternoons when it is warm out. Also the person who changed the spark plugs says that it did not look like a couple plugs were firing. Now the car will not start....it turns over but won't fire at all. Could this modgual be the problem or should I look for something else?
Optional Information:
1989 Oldsmobile regency 3800 V6
Already Tried:
spark plugs and fuel filter
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