Solenoid vs starter - JeepForum.com

 
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post #1 of 11 Old 07-02-2013, 12:27 PM Thread Starter
ZJ1998
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Solenoid vs starter

Search some and read up a little and I think my issue is one of the two. This morning went to start my YJ and it started fine, nice and strong like normal. Immediately stalled. Tried to start it again and it cranks hard but no start. Left it alone for a couple hrs. Came back and same strong crank but no start this time.

Went to jump it and nothing. Any suggestions of how to test this or do I just go and buy a starter?

My understanding is that a starter will help turn the motor over and a solenoid transfers the energy from battery/starter to motor right? So it sounds to me like starter may be good as it has a strong crank but solenoid may be bad. Thoughts?

Background: went wheeling yesterday. Very light, just exploring the wasatch mtns really so dirt roads and some rocks. Nothing big. Stopped and started multiple times yesterday and no issues. Came home and later that night sprayed off the underside as it was a dust ball in the mtns. Just wanted to get the dust off. Left it overnight. Morning time the issues started. It's also a little abnormally hot for utah


93 YJ I6, 5spd, Dana300, twin stick, 35's, D44 front and rear, 4:88 gear
98 ZJ I6, 2"BB, 31's, stock
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post #2 of 11 Old 07-02-2013, 02:29 PM
EABiker
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Your starter is an electric motor that turns the gas engine via a toothed flywheel. The solenoid is basically a high current relay or switch that connects the battery to the starter motor when you turn the key. Your problem sounds more like a corroded cable, battery terminal, or ground connection. Check and clean those first before spending any $$$.
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post #3 of 11 Old 07-02-2013, 04:50 PM
dancytron
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Yeah, you have it exactly backwards. The solenoid supplies electricity to the starter. The starter is then an electric motor that then turns the engine.

If it is cranking, then the whole starter, solenoid, battery cable thing is fine. Don't crank it for minutes at a time, or you will need a new starter.

So it is either fuel, air or spark that is missing. I can't help you anymore because I don't know what engine/year you have.
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post #4 of 11 Old 07-02-2013, 05:05 PM Thread Starter
ZJ1998
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Ok so I checked battery cables and all...then tried to jump start by rolling down a hill. It tried but it just wouldn't fire. So I pulled a plug and put it to a grounded bolt in the engine bay and tried to turn it. No spark. So I'm thinking either distributor/rotor or the coil?

It's on my YJ which is 93. I6.

93 YJ I6, 5spd, Dana300, twin stick, 35's, D44 front and rear, 4:88 gear
98 ZJ I6, 2"BB, 31's, stock
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post #5 of 11 Old 07-02-2013, 05:06 PM
stratostix
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My guess is a dead fuel pump. Particularly if ur not getting any codes.

Check for fuel pressure at the schraeder valve (sp?)

1994 YJ
1965 Mustang Coupe Hi-po
2003 BMW 325i

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If they're gonna bend you over for that much, I'd definitely pay extra for the lube!!
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post #6 of 11 Old 07-02-2013, 09:46 PM Thread Starter
ZJ1998
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I hear the fuel pump turn on though with the key. Not sure if that means anything. I'm sure it is possible it can turn on and not pump anything. I removed the coil pack and was going to pick up one tomorrow to see if that helps. If not I can return it I guess and move on to the fuel pump.

93 YJ I6, 5spd, Dana300, twin stick, 35's, D44 front and rear, 4:88 gear
98 ZJ I6, 2"BB, 31's, stock
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post #7 of 11 Old 07-02-2013, 10:04 PM
Michaelgoesrawr
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If you hear the fuel pump its probably working fine. Have you checked to see if you're getting power to the coil? Have you also checked for codes?

Adopt your pets. Don't shop for them.
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post #8 of 11 Old 07-02-2013, 10:09 PM
stratostix
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Quote:
Originally Posted by ZJ1998
I hear the fuel pump turn on though with the key. Not sure if that means anything. I'm sure it is possible it can turn on and not pump anything. I removed the coil pack and was going to pick up one tomorrow to see if that helps. If not I can return it I guess and move on to the fuel pump.
Like michael said, if u hear its, its probably good to go. It doesnt hurt to check for fuel pressure tho. Literally take 5 seconds.

1994 YJ
1965 Mustang Coupe Hi-po
2003 BMW 325i

Quote:
Originally Posted by Anticanman View Post
If they're gonna bend you over for that much, I'd definitely pay extra for the lube!!
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post #9 of 11 Old 07-02-2013, 10:12 PM
SeanB95YJ
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check your fuses... probably not the fuse panel inside (but couldn't hurt to look)
I'm thinking the big fuses in the PDC under the hood... check the one labeled "ignition" since you have no spark. but since you're there, check the rest too

Good luck

Sean B. - Schenectady, NY - 95 YJ, 350/700r4/NP241, JB Shorty SYE, 8.8 rear, 2" BDS, 1" homebrew shackles, Daystar 1" BL, TJ flares, 35x12.50 General Grabber AT2 on 15x10 Bart D-Truckers, Polyshield polycarbonate windshield, HD over/under crossover steering
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post #10 of 11 Old 07-10-2013, 07:37 PM Thread Starter
ZJ1998
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Didn't update you all...it ended up being the coil pack. I believe that's what it's called. Plugs into the distributor cap.

93 YJ I6, 5spd, Dana300, twin stick, 35's, D44 front and rear, 4:88 gear
98 ZJ I6, 2"BB, 31's, stock
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post #11 of 11 Old 07-10-2013, 07:40 PM
superj
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The ignition coil. A coil pack is on cars with multiple coils that are on a board away from the plugs or actually mounted on the spark plug. Good job though, you found the trouble and fixed it

I don't feel like working on anything at this time so i sold my yj.
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