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Misses
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Posted by: umpyre32

98/4.6 I have a miss at times. It is almost like plug wires are bad, but I replaced wires and plugs. Miss is not there all the time. Will be fine then it will just show up. Happens at highway speeds, local speeds and at idle. Car had not been driven for about 2 months. I had the problem with the IAC valve. Replaced it and it now idles. Just have this periodic miss.

Posted by: Aussie XAXB

Plug a code reader into the interface and you should get a code telling you exactly which cylinder the problem is on. It's better than taking pot shots at the problem.

Steve

Posted by: umpyre32

Looks like may be injector problem. Nothing in computer shows miss fire. I am going to run injector cleaner thru a couple of tanks of gas. If that doesn't work I will pull injectors and have the cleaned.

If I were to replace the injectors, what is the "stock" flow for the injectors I would need AND would it make any difference if I went a little larger on the flow? I have seen 19, 21 and up. Throttle body and engine are stock.

Thanks