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What will cause a 1989 ford f150 with a 302 to break up changec spark plugs cap button fuel filter and fuel pump relay any ideas?
Wiki User
∙ 12y ago
You didn't mention changing the plug wires. If you haven't done that it would be the next thing to check. One major question that needs to be answered is - When was the last time it ran correctly? Did the problem just appear, or did it show up after you attempted a tune up? If it ran fine before a tune up attempt, then it is most likely that you have crossed up the plug wires. Check the firing order to ensure that it's correct. If the problem just happened on it's own then you should check the timing to be sure it is correct then go to the ECU. Another cause could be bad fuel. or weak fuel pump. If it idles fine, but dies or stalls when you put it in gear, then check to see if the exhaust is clogged somewhere ( the old potato in the tailpipe trick).
Wiki User
∙ 12y ago
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