RB20 still runs for a few seconds after key removed...no timer yet, WTF!!!????!?

[dwnshfter]

after i turn the car off and remove the key it still runs for about 5-6 seconds as if i had a timer installed, but i dont yet. any idea what could be causing this?

[USMCgetsome]

lol. you need to hit the winshield wipers! that will kill power. Very common issue due to the 1-8 step wiring.

[Carl H]

engine could also be 'dieseling' due to carbon buildup or bad timing.wiring can also be culprit.

[240z4u]

If your ign key is killing power to the fuel pump and NOT the ECU you will have that symptom as well.

Evan

[Carryl]

do you have efans? some craptacular wiring of efans caused that prob for me.....

[matafied]

do you have efans? some craptacular wiring of efans caused that prob for me.....

+1 must use a relay to isolate the fan power

[DriftingisLame]

I had the exact same problem. Its not dieseling, its like the car runs flawlessly like the keys not even off, for about 5 seconds.

Wish I knew the solution, mine just started working properly a couple days after I finished the swap.

[240z4u]

What about the relay being damaged that engages power to the ECU and f/p? Could be sticking "on".

Evan

[dwnshfter]

not really happy with anything the shop did, i have had trouble with them since pickup. there was a LOT not done on my car that i paid to have done. they half *** did the fans, there just wires run to fuses......

[Carryl]

the 12v supply to the fans comes from where ? under the fusebox?

+1 for wiring in a relay

[D95SI420]

post retracted, good luck over seas and no hard feelings on this end
Modified by D95SI420 at 7:10 PM 9/17/2008

[BoostFab]

the 12v supply to the fans comes from where ? under the fusebox?

+1 for wiring in a relay

to the battery or you could plug in your own fuse link, there are some blank spots in the fuse box.

definitely wiring issue. ggive it a run through.

[dwnshfter]

thats the guy that i paid to do my swap then never showed up for 8 months while thew car sat, lol. yes i have his hoist, he left it in my house for the last 6 months i lived in alabama and never came and got it. anyway, back to the question.....yes, they just ran a ground wire and a wire to a fuse in the fuse box by the pass side fender.....should i re-wire it?

[Carryl]

yeah like he said above you want to run it directly to the battery... and use a relay to click it on with 12V ignition supply......

[dwnshfter]

can i just run a switch from the battery and turn it on after i crank it? will it still need a relay? how exatcly do you wire one in? i dont understand all the prongs it has, lol. i know this is all simple electronics, but i am still learning most of this

[AxiOn419]

can i just run a switch from the battery and turn it on after i crank it? will it still need a relay? how exatcly do you wire one in? i dont understand all the prongs it has, lol. i know this is all simple electronics, but i am still learning most of this

Yes, you definitely have to use a relay. That is unless you want to run a 4 gauge wire to a 4 gauge switch all the way up to the drivers seat, HA! Wiring a relay is not too difficult. Once you look at a diagram it all makes sense. What you are doing is telling a smaller switch to switch on or off a larger switch. This is practical for many reasons.

Here is a diagram:

So you have switched power (something that gets power when the ignition is switched on) running to the relay prong 86, opposite to that is prong 85 which is just a ground wire. Prong 30 supplies the power you will need to power whatever it is you want switched on by the relay. This power should come from the battery but be sure to put in a proper in-line fuse. Next is prong 87, run that to the thing you want to turn on and thats it!

A good source for switched power, assuming you do not have AC, which you most likely do not, is the fuse box right below your air filter. Pull out the Air Conditioning relay and one of the prongs will be hot when the key is switched on.

Hope this helps

[dwnshfter]

Hope this helps

hope this helps?!? i have been trying to understand effin relays for months now and no one will say anything but "yeah, you need a relay"! this quick 2 minute lesson made it ALL clear, lol. thank you so much axion. so are all relays the same? are there different ones like fuses? should i buy new ones or get stock nissan ones from the Junkyard? what is the difference between the ones like this, and the green ones on my RB harness?

[AxiOn419]

I am glad my explanation helped. The relay I described is one you can pick up at AutoZone for $3. Some you will find with a 5th prong but you can ignore it. The numbers (85, 86, 87, 30) will be the same. They are standard for these relays. The green relays built into the harness perform essentially the same job, they are just different looking.

Relays are rated for a certain amperage, you can see on the package what it is rated up to.

Go buy a new one, no need to search a junkyard for a $3 relay

Are you wanting to wire your efans to the relay? I was a bit confused at what exactly you were wanting to wire.

edit: Nevermind, just read through the whole topic and see that you want to wire a relay for a fan. Do exactly what I explained and you will be all set.

[dwnshfter]

since i am running the T-Rex fuel pump, should i put it on a switch too or leave it on the stock wires?

[dwnshfter]

also i want to do away with the ignition switch, it is old and the key falls out i want to do just a push button start, can i just run switches for all the accessories and a push button start or is that more complicated than i am thinking? i want to use the A/C button for the start button, is that an ok button to use or do i just need to buy one and hide it in the car somewhere.....

[AxiOn419]

If I am thinking correctly, you will still need your key in the ignition in the ACC position and then push the button to start the car. You would be removing 2 wires (I think) from the back of the ignition and putting them to your push to start button. As for using the AC button to start the car, well.. #1: That is extremely ghetto.#2: Thats the best anti-theft system ever thought of.. Carjacker: "DAMN IT I CANT GET THE CAR TO START, OH WAIT, LET ME TURN THE AC ON".

I really am not familiar with push to start buttons though. You could always just simply replace your ignition..

[240z4u]

No way would I have an ignition setup without a key. All it takes is one person to find out and your car is gone.

That said.

Ford back in 89 or so had a security feature on some cars where you had to switch on the headlights to engage the starter.

Evan

[dwnshfter]

well i was thinking just a new ignition remotely in the center console, just one from the parts store, then the a/c button cause honestly, who would push it.....

[rswails]

do you have efans? some craptacular wiring of efans caused that prob for me.....

+1 must use a relay to isolate the fan power

You are correct. I had this same problem and found out why the car keeps running. It's because when you switch off the ignition, the efans are still spinning for 3-5seconds. Since you don't have a relay, the efans backfeed electricity into the ignition circuit. Your efans generate electricity similar to how your alternator does when it is spun. So far I haven't seen anyone explain exactly what happens, they have just explained the solution.