still runs after key is off

Post by **usncorpsman** » Mon Jan 22, 2007 4:17 pm

ok so....just got an sr swap...when i turn the car off... it still runs briefly and the sputters off...is this normal??

Post by **cheapscheisst** » Mon Jan 22, 2007 4:23 pm

are you sure that you didn't accidentally(?) install a turbo timer?

Post by **usncorpsman** » Mon Jan 22, 2007 4:25 pm

positive...cause i didnt do it...the shop did...and i didnt pay for one...and its only for like 2 seconds...so its not like a turbo timer would do

Post by **usncorpsman** » Mon Jan 22, 2007 6:12 pm

anyone?

Post by **homeslicej2** » Mon Jan 22, 2007 6:21 pm

Sounds like engine dieseling, but I don't know if that is supposed to happen on fuel-injected cars. Try these links and see if they help.

http://www.cartalk.com/content....html

http://answers.yahoo.com/quest...tjWys

Good luck.

Post by **redtop91** » Mon Jan 22, 2007 6:22 pm

How long does it run after shutdown?

Post by **Blown240sx** » Mon Jan 22, 2007 6:27 pm

Mine did this for a while. I think had to do with wiring. My car would starve of fuel till it shut off. I couldnt figure out why though but when I swapped the car to my S14 it didnt do it anymore. I think it was because I changed harnesses.

Post by **usncorpsman** » Mon Jan 22, 2007 8:02 pm

thanks guys...much appreciated...ill see what happens

Post by **oki_bum** » Tue Jan 23, 2007 1:33 pm

mine did something similar till i replaced my stock cat with a high flow one. Didnt make to much sense to me, but hey...

Id take it back to the shop and tell them to fix it.

Post by **usncorpsman** » Tue Jan 23, 2007 4:15 pm

after reading the wikipedia article homeslice gave me...i think thats the problem...i upgraded to a walbro 255lph on a stock motor...other than a fmic and turboback exhaust.... it tries to flood out the motor everytime i start it anyway... so im getting to much fuel i guess...which should be solved soon cause we already planned on puttin a fuel pressure regulator...and the guy that owns the place is a friend so its not like this all that much of a hassle to get fixed... just a pain...thanks guys for all your help

Post by **SpeedRacer1** » Tue Jan 23, 2007 4:34 pm

Fuel wouldnt get into the engine unless the injectors sprayed it in, no matter how much fuel pressure is built up.

Post by **usncorpsman** » Tue Jan 23, 2007 5:04 pm

well the motor could still be getting too much fuel while on....so when i cut the ignition off there could still be extra gas in the motor...Correct?

Post by **S13FASTBACKSR** » Tue Jan 23, 2007 5:26 pm

if you think about it..no matter when and where you shut your engine off there will be fuel flowing through it..the engine doesnt know when your going to shut it off so it cant say alright i have to decrease the amount of fuel running through the engine..if you ask me..it has to be somewhere in the wiring harness

Post by **usncorpsman** » Tue Jan 23, 2007 5:32 pm

the comp tells the injectors when to be on or off....does it not? therefore fuel cant go thru the motor while off

Post by **homeslicej2** » Tue Jan 23, 2007 6:11 pm

Seems to me that you and your friend will just have to troubleshoot it. Start w/what everyone has given you here and then go from there.

Post by **S13FASTBACKSR** » Tue Jan 23, 2007 9:46 pm

06krf150 wrote:the comp tells the injectors when to be on or off....does it not? therefore fuel cant go thru the motor while off

Im not sure if this is right or not bro. all i can say is pull your fuel rail off with the injectors still in. unplug the coilpacks and crank the engine. now you can see if any of the injectors are staying open too long. i dont think your ecu is bad because when that goes bad usually you will have a lot of problems other than the one you are having...such as misfiring, richness, bogging..this is an uncommon problem that i dont think is caused by the computer imo

Post by **usncorpsman** » Wed Jan 24, 2007 3:12 am

no...im not saying its my comp...someone said that there was nothing stopping the fuel from entering the motor when it was off... i was just stating/wondering that the comp tells the injectors when and when not to be off

Post by **S13FASTBACKSR** » Wed Jan 24, 2007 6:23 am

yes the computer does but the injectors could be faulty and not stop pouring fuel into the engine. so do the little test i told you to see if they are sticking open. otherwise i would look back into the wiring job you did. i know it would be a pain but ....another thing you could do is buy a turbo timer hook it up and then see what happens. btw what do you mean "sputters" off

Post by **srpowered240sx** » Wed Jan 24, 2007 7:08 am

does the electronics in the car continue to run and just the engine idle, or does everything stay on for a few seconds?? it could just be a bad ignition switch if everything continues to run.

Post by **NY S13 SR** » Thu Jan 25, 2007 7:13 am

I have seen this many times - usually it is something in the ECU wiring for power, backup power or ground that is mis-wired. Also if the fuel pump has had it's wiring relay bypassed to make the engine run, it is almost certainly a wiring issue.

_____________________Jeff Holdenhttp://www.heavythrottle.com

Post by **pearlS13** » Thu Jan 25, 2007 9:09 am

My sr did this when i first got my swap running but it would constantly keep running with the key off...I mean like i could drive the car with NO key in the ingnition!!! It was constantly getting power even with my key off. After ALOT of swearing and frustration i decided to swap out ecu's.....and that was the problem!

Post by **S13FASTBACKSR** » Thu Jan 25, 2007 10:14 am

hmmm..ya i think i would go with a new ecu before i went and re-did the wiring..the ecu is a lot less of a hassle and they are not that much money

still runs after key is off

still runs after key is off

Re: still runs after key is off (06krf150)

Re: still runs after key is off (cheapscheisst)

Re: still runs after key is off (06krf150)

Re: still runs after key is off (06krf150)

Re: still runs after key is off (homeslicej2)

Re: still runs after key is off (redtop91)

Re: still runs after key is off (Blown240sx)

Re: still runs after key is off (06krf150)

Re: still runs after key is off (oki_bum)

Re: (SpeedRacer1)

Re: (06krf150)

Re: (S13FASTBACKSR)

Re: (06krf150)

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Re: (S13FASTBACKSR)

Re: (06krf150)

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