Question about 2001 Hyundai Santa Fe

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No fire to one of the coils which supplies 2 plugs engine light on and running on 4 of 6 cly.

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Several possibilities. Internal coil failure, wiring or connection problem, computer is not functioning properly to energize the coil pack. Which two cylinders? I gather the Check Engine light scan reveals misfire codes (DTC) P030? and P030?
Check out the wiring diagram:
No fire to one of the coils which supplies - f44e6bb.jpg
ddNo fire to one of the coils which supplies - 78bd4d6.jpgclass= 78bd4d6.jpg Problem could be here or at the ECM connection. If not, then the coil pack has gone bad.

Posted on Jun 02, 2009

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I put it in the hyundia shop and they said it was a loose yellow wire in the ecm. But shortly after that yellow wire came loose again and i dont know where the ECM is? so I can reconect that yellow wire..Thanks so much

Posted on Nov 22, 2012

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P0304 Steady Check Engine

P0304 is a misfire on cly. #4. Pull the plug and see if there is a lot of oil that may be fouling it out. If you are burning oil, one thing you can do is switch to synthetic. Synthetic oil will not burn and it can minimize the loss.

Also if you only replaced one coil pac, you may have a problem there, but that is remote since each coil runs two cylinders and you only have a cly.#4 code.

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My 1988 Chevy s10 2.5 cly. Won't fire. I pulled

All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

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Once you have determined which of these functions has dropped out,
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Aug 28, 2013 | Cars & Trucks

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does 4 & 6 run off same coil? if so i would look at that coil or wireing to that coil

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Igniton coil on a 04 silverado 5.3

Back of Engine

#8 cly #7 cyl

#6 cly #5 cyl Firing Order IS

#4 cyl #3 cyl 1-8-7-2-6-5-4-3

#2 cyl #1 cyl

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A Very CRUDE But Eficiant Diagram of Your 5.3L Engine and its Cylinders LOCATION'S In the ENGINE. #5 Ignition Coil is on Driver Side of Engine and is the SECOND ONE FROM THE REAR OF THE ENGINE.THIS is TRUR AND CORRECT IM POSSITIVE !!
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Need to know firing order

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