Miss Firing on Plug one - Need Advice - Defender Source
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  #1  
Old May 18th, 2012, 02:24 PM
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Miss Firing on Plug one - Need Advice

I have a 3.5 and drove it for the first to the gas station after my "rebuild". I have loss of power and when I hook my timing light to the 1 plug it seems to be miss firing. The light will blink then stop and start. I removed all plugs and cleaned them. What should I be checking? Thanks in advance.

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Old May 18th, 2012, 02:40 PM
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I would check the wires form the cap to the plug, switch #1 with another known good wire and see if that one then misfires. You may have a bad wire.

Also check under the cap for a bad contact

may want to also change that plug for a good one
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Old May 18th, 2012, 03:03 PM
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Switched wires no luck, looks like I'd also doing the same thing when I hook the timing light to it.
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Old May 18th, 2012, 03:11 PM
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swap and arm for a known good one
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Old May 18th, 2012, 03:17 PM
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8 was also miss firing. I will a new rotor a and see what happens
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Old May 18th, 2012, 05:59 PM
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I ordered a new rotor arm but I replaced the cap and rotor late last year and never touched those parts during the rebuild. I looked at them and there appears be to no issue with them no Arking (sp).

Any thoughts on why both the 1 and 8 are having issues. I am going to purchase 2 new plugs on saturday and I found extra wires as I want to try that again.
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Old May 19th, 2012, 04:49 PM
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Fixed it last night with new plug and wire. Ordered a new set of wires to replace all of them.
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Old May 20th, 2012, 08:59 AM
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Nice, good thing iT was something cheap
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Old May 20th, 2012, 03:18 PM
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Yes I know I need a break from spending rover money. Still need to complete my interior but I can do that overtime now and still be able to use the 110
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Old May 21st, 2012, 06:03 PM
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Just saw this thread. I was having a similar problem a few months ago, and the check engine light was coming on. Mine turned out to be plugs. I was using Bosch Platinum plus 4 plugs, and have since seen others say they've had problems with those too. Replaced them with some run o' the mill Champions and it runs great.
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