Ka24de fuel pump, start up problems....

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yohnp
Posts: 393
Joined: Fri Jun 19, 2009 11:52 am

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S13 KA24DE

OK so i know this has been discussed before.YES I SEARCHED but i haven't read anything that has a solution to this... i need someone to help me out with my problem i'm having.

1. my fuel pump is not priming, yes i checked fuses, relay.all good n replaced. and nothing.
checked wiring. seems fine. checked black n pink wire.. and once i connect it directly to ground pump works but does not STOP... seems like some how there's no signal going to pump which is the black and yellow wire.. off relay to pump.

2. My motor cranks but no spark... plugs are good cables are good , im thinking maybe coil ignition , power resistor?

question is there suppose to be power signal from ecu to dizzy or coil ign ? tryed checkin with test light and theres nothing
cheked grounds with ohm

sorry if i sound like a stupid noob.

but this never happen with my old motor.

do i have a grounding problem wtf please hel


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PapaSmurf2k3
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Joined: Thu Nov 21, 2002 3:20 pm
Car: 2017 Corvette, 2018 Focus ST, 1993 240sx truck KA Turbo.
Location: Merrimack, NH

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Damn, so you're not getting fuel OR spark? That's rough. I want to say that the dizzy is supposed to get power from the ECU via the big white wire, but I'm not 100% sure on that. Do you have a spare ECU you can try?

yohnp
Posts: 393
Joined: Fri Jun 19, 2009 11:52 am

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PapaSmurf2k3 wrote:Damn, so you're not getting fuel OR spark? That's rough. I want to say that the dizzy is supposed to get power from the ECU via the big white wire, but I'm not 100% sure on that. Do you have a spare ECU you can try?

yea have plenty spare ECU's nd nothing.. or could it be the Dizzy? Motor cranks over but no Vroooom Vroom

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PapaSmurf2k3
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Joined: Thu Nov 21, 2002 3:20 pm
Car: 2017 Corvette, 2018 Focus ST, 1993 240sx truck KA Turbo.
Location: Merrimack, NH

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Yeah it could be I suppose. Have you checked your cap and rotor? Is there any moisture in there? You're still going to have to figure out why you're not getting fuel too though.

yohnp
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Joined: Fri Jun 19, 2009 11:52 am

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PapaSmurf2k3 wrote:Yeah it could be I suppose. Have you checked your cap and rotor? Is there any moisture in there? You're still going to have to figure out why you're not getting fuel too though.
yea like i mentioned before, lets say im gonna check the wires with these light.. i ground test light and check the black n pink going to fuel pump relay and fuel pump starts priming constantly doesnt stop till i pull the test light off. will check cap n rotor got another dizzy that i will try aswell

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PapaSmurf2k3
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Posts: 19000
Joined: Thu Nov 21, 2002 3:20 pm
Car: 2017 Corvette, 2018 Focus ST, 1993 240sx truck KA Turbo.
Location: Merrimack, NH

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OHHH, yeah, if you ground the right leg on a relay, it will complete the circuit and stay complete til you un-ground the relay.
This is actually how I have my electric fan wired (just wire a switch to ground the fan relay FYI).

tbathurst
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Joined: Fri Jul 16, 2010 11:48 am
Car: 90 300zx2+2
Location: roseville mn

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there is definately a circuit issue of some kind sounds like you have an accesorie wire to turn on and a ground but you still need a power a switch would be your best option

yohnp
Posts: 393
Joined: Fri Jun 19, 2009 11:52 am

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hmmm i was running a ca18det with megasquirt before nothing else hooked up to motor harness , xcept that one brown plug with black n pink located by battery . and 2 wires behind glove box :( now im i went KA and this is happening


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