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unsure of what to do maybe i can get advice in here?

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jayson427

10+ Year Contributor
1,515
4
Dec 20, 2011
Mesa, Arizona
so i posted a thread in the 420a section but after a little direction and it not working im lost. so i thought i would post my thread on the newbie side since it seems like they get alot of help LOL. heres a link to my thread if someone has time and can read through it, it would be greatly appreciated. i havn't touched my car since the last time it had issues so i had to buy a new truck due to me not wanting to throw money at it and not fixing my issues. let me know what you guys think.

http://www.dsmtuners.com/forums/420...d-help-car-died-had-big-trouble-starting.html
 
First, thing is first. What have you done to it since the 27th of last month? What did you or did not change & what advice did you take into action?
 
i havn't done anything to it since i put new spark plugs in on the 24th of last month. about 3 weeks before that my coil took a crap but only on 2,3 on the coil. i put a different coil that was good on and it ran great for a week but then it misfired. after that it sounded horrible i had weak spark and no power. i have not touched it in two weeks since it was misfiring out of know where while driving. im not sure how to check the ohms on the coil. im not sure if my car is running rich or if my coolent sensor is bad. like i stated in my thread i couldn't even get spark off of a bolt while trying to crank it over. my boss said it was super weak. i dont know if i need to put a cat back on it, run different injectos, new coil, new coolent/map/crank sensor or relash my valves.
 
Here we go again, :banghead: Go buy a TEST LIGHT, & VOLTMETER.

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Coil one fires cylinders 1 and 4. Coil two fires cylinders 2 and 3. Each coil tower is labeled with the number of the corresponding cylinder.

PRIMARY COIL RESISTANCE

Disconnect the electrical connector from the coil pack.
Measure the primary resistance of each coil. At the coil, connect an ohmmeter between the B+ pin and the pin corresponding to the cylinders in question.
Standard value: 0.51 - 0.61 Ohm
Replace the coil pack if resistance is not within the standard value.

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SECONDARY COIL RESISTANCE

Remove spark plug cables from the secondary towers of the coil.
Measure the secondary resistance of the coil between the towers of each individual coil.
Standard value: 11.5 - 13.5 K Ohm
Replace the coil pack if resistance is not within the standard value.

--------------------------------------------------------------------------------------------

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-----------Resistance----------
= 9 - 11 ohms at 25 deg C
= 0.6 - 0.8 ohms at 100 deg C
 

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i appreciate the advice. anyway so i just checked my ohms and they are 0.3 on both sides. so im guessing my coil is shot but this is the second one i have gone thru in a month. what would kill my coil like this? im sure i will get havoc for this too but the ground wire that comes off of the firewall has been on my coil for sometime im not sure why or how it got there but i put it back on the intake manifold would that kill my coil?
 
I did not mean to sound like a ****, :nono: I had a moment, sorry! :coy: I will be the least to be a **** on this site, :D If anything I will try to cause the problem to my vehicle and get a video to the solution of it. :sneaky: I do understand what you mean though. What ground are you talking about that was on the (coil) that you now have on the intake manifold, Photo? :confused: Thank you.
 
LOL its all good man i know how some people ask dumb questions. i hate electrical and cant do alot of it but im mechanically inclined. the wire im talking about is usually the one that comes off of the center of the fire wall and is grounded to the throttle cable bracket. some reason it was on my coil for a while and i just put it back in the right place. i dont know if that would cause my coils to go out.

my coil is bad tho right?
 
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Well, The (ground) you talk about may be another ground, but there is a ground on the (coil) connector itself, so if it was to say that "that ground would be the cause is unlikely." If you have ran through two coils, then I would run and cut into the harness and look for some damage. There is a lot of problems with the (coil connector) not connected correct and/or the Heater/EGR lines running against the harness causing a short circuit because of the heat. To show what ground, we are talking about here is a photo.

The ground cable to the left of the connector (A-05)

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First, finding the no/weak spark is a priority, then we can move on.
 
alright so here are some pics that i just took. as you can see my egr is blocked and my sensor is just hanging out right there. i took another pic of the ground wire im talking about and that is the one i had on the coil. also you can see my wire loom is shredded in a few areas but none of the actual wires are torn ripped or frayed.
 

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First, Picture 1: all good. Picture 2: ROFL, sorry. The ground cable we speak of that the moment is just not doing anything, one end should be on the firewall and the other to a small black relay that should be mounted on the cruise control assy. on the left hand side of the intake manifold. Picture 3: the wiring harness to the coolant temp sensor needs to be wire loomed up or at the minimum taped up with black electrical tape. Moving on, Picture 4: same thing with the harness once again, just to rule out that your wiring it prefect. Picture 5: Go change out the (MSD) **** coil for a factory replacement, please. Picture 7/Last one: disconnect your battery and wait an hour or so, to not cause any problems to the ECU with power surges, then disconnect the (ECU's Connections/connectors) and that NEEDS to be fixed. Plug everything back in and make sure you hear them "click" back together, connect the battery. Then we can move on. If you want, you can remove your (ECU), open it up, check for leaks from the capacitors and any other visual damage, if any...
 
yeah if i had cruise control i guess it could go there but i dont. the wire is bolted to the firewall and is on the bracket. it has no other place to go and its a factory wire. i know i need to tape my loom up but my car "did" drive and start up with no problem. and for the msd coil it was my back up that came with the junkyard motor i pulled and rebuilt. i had a stock oem coil on it and that was the first one to go out so i had to put the msd on it and now that one is gone. i just dont want to go buy another coil and have it go out because the next one i get will be a screamin demon. and my ecu is solid i just bought an a/fx about 3 months ago. im sure with new coil it will run but i dont want it to go back to the same thing as now and misfiring.
 
yea apparently msd coil packs for our car aren't the greatest, from what I've heard, screamin demon coil packs are the best and put out more volts that the stock pack and you have to gap your plugs bigger, does anyone know if the Beck/Arnley Ignition Coil packs from advance are good? i would say pick one of them up supposed to be oem replacement too
 
I would say that the coilpacks them selves could just be bad.. i mean the stock one you first had is like 15yrs old right then theres no telling how long that msd has been around being you picked it up used...i have an extra coil pack for 420a you can have just pay shipping just to try it out and see what happens..
 
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