High initial idle and flashing CEL? - Mustang Evolution

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Old 09-18-2012, 09:03 PM   #1
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High initial idle and flashing CEL?

So tonight when My car started my Rpm shot up to 1 1/2 and idled there for about 20 secs and my check engine light started flashing as soon as it idled back down the light went off. I noticed this about a week ago but never took mind to it. Noted : my car has started to heat up a little more than usual to about 200. Any ideas?
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Old 09-18-2012, 09:06 PM   #2
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Re: No idea..

Misfire is flashing light. Have you checked for any antifreeze in your oil. You might have a blown head gasket?
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Old 09-18-2012, 09:12 PM   #3
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No I haven't and I can't really check to see if there is. By looking down the pour hole there doesn't look like any. I did recently jUst change the spark plugs.
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Old 09-18-2012, 09:15 PM   #4
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Re: No idea..

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No I haven't and I can't really check to see if there is. By looking down the pour hole there doesn't look like any. I did recently jUst change the spark plugs.
Ok....double check you got the correct spark plugs and double check the gap. Wrong plug and or wrong gap can cause both those problems.
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Old 09-18-2012, 09:19 PM   #5
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Yeah it feels like its been running crappy since. I gapped than all to I think 0.44 hopefully that's right.
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Old 09-18-2012, 09:24 PM   #6
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Re: No idea..

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Yeah it feels like its been running crappy since. I gapped than all to I think 0.44 hopefully that's right.
Yeah pull your plugs make sure they are correct and gapped correct. Also check wires. Make sure none of the plugs are broken. I would start with that and see how it goes. Keep us informed.
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Old 09-18-2012, 09:26 PM   #7
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Yep I will Man thanks a lot.
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Old 09-18-2012, 09:28 PM   #8
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Re: No idea..

Also, I think the stock gap is .054 if I'm not mistaken??
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Old 09-18-2012, 10:08 PM   #9
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That's exactly what I just got done reading maybe that's why it's running like crap. They ate all gapped to 0.44 . Would that misfiring mess anything else up? Or anything else I should look at ?
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Old 09-18-2012, 10:45 PM   #10
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Re: No idea..

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That's exactly what I just got done reading maybe that's why it's running like crap. They ate all gapped to 0.44 . Would that misfiring mess anything else up? Or anything else I should look at ?
You should be fine. Gap them correctly and see how she runs. Clear all your codes.
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Old 09-18-2012, 11:22 PM   #11
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My Chiltons says .052 for spark gap for the '94 & '95 5.0 engines. Motorcraft ASF-42C or equivalent plugs.
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Old 09-19-2012, 08:56 AM   #12
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Re: No idea..

It would be helpful if you could find out what codes it may have set?
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Old 09-19-2012, 08:04 PM   #13
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And how would you find that out .? Codes?
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Old 09-19-2012, 08:20 PM   #14
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Re: High initial idle and flashing CEL?

You would need a code reader that plugs into your vehicle.
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Old 09-19-2012, 08:22 PM   #15
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You would need a code reader that plugs into your vehicle.
+1 Oreilly Auto, Pep Boys, Autozone should be able to read them for you too.
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Old 09-19-2012, 08:32 PM   #16
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You can also use a jumper wire and read the codes without a scanner. The procedure can be found in the useful stickies thread.

And also my local auto part stores that you mentioned don't check cel's for you on obd1 equipted vehicles. But some may in other areas?
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Old 09-19-2012, 08:32 PM   #17
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Re: High initial idle and flashing CEL?

There is an article in the (Link >) Useful Info sticky thread that tells you how to pull the codes.
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Old 09-19-2012, 08:35 PM   #18
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You can also use a jumper wire and read the codes without a scanner. The procedure can be found in the useful stickies thread.

And also my local auto part stores that you mentioned don't check cel's for you on obd1 equipted vehicles. But some may in other areas?
I didn't know that about ODB1 and some auto parts stores.
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Old 09-19-2012, 08:35 PM   #19
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Quote:
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There is an article in the (Link >) Useful Info sticky thread that tells you how to pull the codes.
Haha. Beat you to the punch again. except I didn't supply the actual link.
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Old 09-19-2012, 08:39 PM   #20
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Re: High initial idle and flashing CEL?

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Haha. Beat you to the punch again. except I didn't supply the actual link.
That you did. I started the answer, then got up to get some caffeine and BAM, you snuck in there and beat me to the finish.
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