2G DSM noob needs help

VoDkA · Aug 3, 2015

Hey guys I'm VoDkA and I'm new to DSMs and all that. Just recently purchased a pretty little 98 eclipse from a friend and I've gotta say it's a pretty fun car.

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She's just a mostly bone stock 420a that might have performance cams, an exhaust, nothing major. Was running great until I decided to take it out for a half hour burn down the highway and back and just before I got back into town, it started running rough, misfiring a few times, then when I popped it into neutral it shut off, never to be started again. Engine cranks it's heart out but refuses to start. Checked for spark, there was nothing. So obviously I know my problem is spark but I don't know much about these cars (yet) and I'm wondering what the most likely problem is. You guys know these cars better than I do so is it the coil pack? Is it the ignition rotor? What could it be? I had some new spark plugs for it waiting to be put in so I put them in and that of course did nothing. I didn't really expect it to help haha. Any help would be greatly appreciated! Thanks!

VoDkA

PlanZero · Aug 3, 2015

If you have any junkyards around you, grab a coil pack and wires just to see, or grab one off eBay. The coil pack on a 420 is a piece of crap. If there's already an aftermarket coil pack on the car, check that the connector plug is secure, and pick up some new wires.

VoDkA · Aug 3, 2015

PlanZero said:
If you have any junkyards around you, grab a coil pack and wires just to see, or grab one off eBay. The coil pack on a 420 is a piece of crap. If there's already an aftermarket coil pack on the car, check that the connector plug is secure, and pick up some new wires.

The coil pack looks stock. So what you're saying is that these coil packs have been known to fail and that I should start with that? Thanks for replying btw.

Cruciatus111 · Aug 3, 2015

there is a possibility that your coil package have failed but before you spend money on parts check the resistance of the coils first, then if needed buy could if they are bad.

Also check to make sure all of your wires are all plugged in and where it should be, it is possible that something came unplugged and that is causing the problem.

VoDkA · Aug 4, 2015

Yeah I made sure everything is plugged in where it should be and all looks well. So what should I do? Get a voltmeter and test it somehow like that? I'll take it off tomorrow when I get the time and see what I can see.

Maes · Aug 4, 2015

You will be testing the coils resistance. Put the dmm on ohms and test each coil. Then post your results if you are unsure.

VoDkA · Aug 4, 2015

Where should I put the leads? On the pins where the connector goes or on the posts of the coils themselves? I'm guessing the pins?

Maes · Aug 4, 2015

You want to test the input side of the coil not the output.

Maes · Aug 4, 2015

Put the meter on ohms put one lead on pin 2 (the middle pin) then other lead on pin 1. That is 1 coil. While keeping the lead on pin 2 check that to pin 3 that is the other coil. They should read low ohms

97 eclenger · Aug 4, 2015

get a crank sensor. if those go out, youll have no spark or fuel pump. are your injectors and other sensors getting power? if not, look at your auto shut down relay

VoDkA · Aug 4, 2015

97 eclenger said:
get a crank sensor. if those go out, youll have no spark or fuel pump. are your injectors and other sensors getting power? if not, look at your auto shut down relay

Never thought of the crank sensor yet. If I check the coil pack and it tests good, I'll look into that next. I'm not sure how to test everything else for power. I do find it strange that the plugs were completely dry after I tried starting it a few times. Shouldn't they be somewhat wet if the injectors are getting power? I think I hear the fuel pump prime when I turn the key but I could be wrong.

97 eclenger · Aug 4, 2015

the pump will prime only for a few seconds. for the engine to run, the crank would have to signal the ecu that the engine is turning over to turn the pump on. i learned that part on my 3000gt. cam sensor unplugged, spinning the crank sensor youll get spark and hear the fuel pump but no injectors working so you do't blow your engine up.

VoDkA · Aug 12, 2015

Hey guys, me again haha and I'm still a noob. I'm such a noob, I forgot how to use a goddamn voltmeter. XD So here is a pic of my voltmeter. What setting do I use to test the resistance on the coil pack? I know where to put the leads but not what setting to use and what it should read if it's good. Haaaaaaaaaalllpp!

AWDnBoosted · Aug 13, 2015

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here is a video that explains it

VoDkA · Aug 13, 2015

Ok so I watched the video but still don't understand. He says "switch it to ohms" but there are multiple settings for ohms on my multimeter. What range/setting should I use?

Maes · Aug 13, 2015

The 6 o'clock position 200. That means 200 ohms and less your meter can read. That meter is junk btw take your leads with your meter on the 200 ohm setting and touch them together what do you get? Should be .01-.03. If not you will have to compensate the values of your leads.

VoDkA · Aug 14, 2015

My meter only has one value slot after the decimal on the 200 setting. XD It reads 0.2/0.3

VoDkA · Aug 14, 2015

The reading from the coils are 0.8 and 0.9 so either the coil is f***ed or the meter is f***ed or both. haha

Maes · Aug 14, 2015

No that looks ok

VoDkA · Aug 14, 2015

Damn. I was hoping it was the coil. Looks like it's probably the CPS. :'( Pain in the ass to change from what I hear...

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