Parasitic drain - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

josephin510 · 08-21-2009, 01:47 AM

Ok i have an 92 s13 it has a major parasitic drain i cant find were at. I relocated the battery to the back then one night of spirited driving my tool box opened up hit the battery then grounded out the battery. I bought a new batt my car fired right up one time now my fuel pump doesnt prime i checked all the fuses and changed all the relays. I checked my engine harness its good i checked the engine bay/headlight harness it seems to be the interior harness.????? Has anyone had this prob there battery grounding out then there car had a drain. HELP 240sx GURUs

YEs STUPID i DiDnT HavE A bATt BoX I WaNteD to DRIVE thAt nIGht BeForE FinIShINg WhAt i StaRtED

wow-thats-a-cool-car · 08-21-2009, 01:52 AM

your ecu is dead
go buy a new one

stealthsr20 · 08-21-2009, 02:32 AM

yup. make sure that your chech engine lights up when you turn the key on and if it doesn't the new ecu for you

josephin510 · 08-21-2009, 12:51 PM

Quote:

Originally Posted by stealthsr20

yup. make sure that your chech engine lights up when you turn the key on and if it doesn't the new ecu for you

Your talking bout the check engine light it does it started this morning when i gave the fuel pump 12v.

mxexux · 08-21-2009, 04:42 AM

that's not a parasitic drain...

josephin510 · 08-21-2009, 12:54 PM

Quote:

Originally Posted by mxexux

that's not a parasitic drain...

When the car is started the battery drains. Then car dies.

Chrischeezer · 08-21-2009, 09:02 AM

sounds like an ECU problem to me

but i also seen a bad CAS cause the fuel pump not to prime.. car still cranked over just fine.

Bigsyke · 08-21-2009, 03:32 PM

Quote:

Originally Posted by Chrischeezer

sounds like an ECU problem to me

but i also seen a bad CAS cause the fuel pump not to prime.. car still cranked over just fine.

Impossible,

your talking about the CPS? camshaft position sensor?

I tossed my CAS in the garbage.

The ECU has nothing to do with a fuel pump relay. There could be a burn in any one of your harnesses, and you would almost have to strip the insulation to find it. Follow the FSM, your fuel pump relay/harness is fried, or your fried your fuel pump. I know you didnt change your fuel pump relay, did you order all new OEM relays from nissan? thats alot of money to throw at your car like that, so im assuming you didnt even check the relay;

Take a 10ga wire, attaching it to the + side of the batt, and the other side to the 12v side of the fuel pump harness, no prime, fuel pump or solders in the fuel pump retaining housing. Primes, your relay is bad or your harness.

Simple as that, ECU is fine

Quote:

Originally Posted by josephin510

When the car is started the battery drains. Then car dies.

Check the FSM, it will walk you through how to trace where the break is, there is a connector on the alternator, and also a 12v ring connection that you can have go directly to your battery (fused I hope)

josephin510 · 08-22-2009, 09:12 PM

Found the prob there was melted wires in my interior harness.

Veracity84 · 08-21-2009, 04:58 PM

How about the alternator is dead?

What gauge wires you running for the relocation? 18 gauge? lol. Double ott 0/0 would suffice. Give the 12v straight to the pump and so you did,

Check Ignition switch fuse/relay as well as fuel pump 15amp fuse. Pretty much check that fuses/relays in your engine bay. Since the fuel pump doesn't prime on ignition and does on straight 12v, you're looking at the circuit isn't continuous, IE, power, ground, signal, fuse, relays.

Does the car crank over?

08-21-2009, 01:47 AM	#1
josephin510 Zilvia Junkie Join Date: Mar 2009 Location: richmond Age: 36 Posts: 504 Trader Rating: (0) Feedback Score: 0 reviews	Parasitic drain Ok i have an 92 s13 it has a major parasitic drain i cant find were at. I relocated the battery to the back then one night of spirited driving my tool box opened up hit the battery then grounded out the battery. I bought a new batt my car fired right up one time now my fuel pump doesnt prime i checked all the fuses and changed all the relays. I checked my engine harness its good i checked the engine bay/headlight harness it seems to be the interior harness.????? Has anyone had this prob there battery grounding out then there car had a drain. HELP 240sx GURUs YEs STUPID i DiDnT HavE A bATt BoX I WaNteD to DRIVE thAt nIGht BeForE FinIShINg WhAt i StaRtED __________________ Trade my Rb25 for some wheels. Buy my Sc300.

08-21-2009, 01:52 AM	#2
wow-thats-a-cool-car Post Whore! Join Date: Mar 2008 Location: California Posts: 2,663 Trader Rating: (6) Feedback Score: 6 reviews	your ecu is dead go buy a new one __________________

08-21-2009, 09:02 AM	#7
Chrischeezer Zilvia FREAK! Join Date: Jul 2005 Location: earth Age: 41 Posts: 1,406 Trader Rating: (2) Feedback Score: 2 reviews	sounds like an ECU problem to me but i also seen a bad CAS cause the fuel pump not to prime.. car still cranked over just fine. __________________

08-22-2009, 09:12 PM	#9
josephin510 Zilvia Junkie Join Date: Mar 2009 Location: richmond Age: 36 Posts: 504 Trader Rating: (0) Feedback Score: 0 reviews	Found the prob there was melted wires in my interior harness. __________________ Trade my Rb25 for some wheels. Buy my Sc300.

08-21-2009, 02:32 AM	#3
stealthsr20 Zilvia Member Join Date: Nov 2008 Location: oklahoma Age: 41 Posts: 256 Trader Rating: (3) Feedback Score: 3 reviews	yup. make sure that your chech engine lights up when you turn the key on and if it doesn't the new ecu for you

08-21-2009, 04:42 AM	#5
mxexux Zilvia Junkie Join Date: Jun 2008 Location: SoCal 949 Posts: 363 Trader Rating: (9) Feedback Score: 9 reviews	that's not a parasitic drain...

08-21-2009, 04:58 PM	#10
Veracity84 BANNED Join Date: Jul 2009 Location: DTLA Posts: 77 Trader Rating: (0) Feedback Score: 0 reviews	How about the alternator is dead? What gauge wires you running for the relocation? 18 gauge? lol. Double ott 0/0 would suffice. Give the 12v straight to the pump and so you did, Check Ignition switch fuse/relay as well as fuel pump 15amp fuse. Pretty much check that fuses/relays in your engine bay. Since the fuel pump doesn't prime on ignition and does on straight 12v, you're looking at the circuit isn't continuous, IE, power, ground, signal, fuse, relays. Does the car crank over?