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post #1 of 2 (permalink) Old 04-07-13, 07:34 PM Thread Starter
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'98 E150 misfire

Hello all,
Looking for suggestions regarding 1998 E150 4.2L V6 misfire. Van has 195,000 miles on it. The only code I get, or ever got, and still get, is P0304. So, I replaced the coil pack and the #4 injector. I swapped the plug wire with another one and there was no change. Compression is fine. The engine starts and idles fine, and is fine at highway speed. The misfire only seems to happen when accelerating from a stop, briefly, also when you take your foot off the gas at a good speed and use the engine drag to decelerate, it is the worst when just cruising around local streets at about 35-40 mph, when the engine is at a low RPM and a higher gear.


Last edited by wnspecht; 04-08-13 at 08:29 AM. Reason: Wrong idea.
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post #2 of 2 (permalink) Old 04-08-13, 10:01 AM
2002 F150 XLT
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Re: '98 E150 misfire

Did you check the spark plugs? What brand are they?

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