I have an idea to test if its a Ground Issue

Timm10221 · February 18th, 2011, 12:41 PM

OK so Lets say my battery doesn't have a good ground, I was thinking while doing a convoy this morning, I can take a jumper cable, hook it up to the neg battery terminal, and then ground it out on a good bare part of my frame and see if thats the issue..

Only thing it wont explain is my guages taching out to the right... When I get home I will throw the dash back in the car and try it. I want this car to run so I can do a few more track days before I deploy... I think I can hit 12.9 as is right now and really wanna do it. that 13.02 had me excited and I didnt even foot brake it...

Tim

302Army187 · February 18th, 2011, 01:12 PM

meh. I GUESS it would work if that cable itself is the issue.

Timm10221 · February 18th, 2011, 02:18 PM

Yeah, thats what I mean, I have the Neg on the battery grounded to the radiator support.. But would a ground issue cause the guages to act funny...

fogged306 · February 18th, 2011, 05:40 PM

Ground issues can cause all kinds of different problems. Jumper cables isn't a great idea. They aren't that great of a connection at the clamp. Why not just get a few feet of 4Ga and some connectors from a stereo shop and make a couple new grounds. One from the block to the frame and one from the frame to the battery. Should cost you maybe $20-$25 at the most and it's good piece of mind. If you do it, make sure you don't over tighten the bolts, and sand the area down to bare metal for the connections, then paint over it when you've made the connection.

I just had the gauges on a truck I just bought doing all kinds of odd stuff. I found that the grounds to both of my batteries were loose. Re-did them and my gauges work fine now.

Not saying this is definitely your issue, but it's never a bad thing to have a solid ground and it doesn't hurt to try.

93hatch · February 18th, 2011, 06:20 PM

gounded to the fucking support? Im gona beat your fucking ass. Ground it to the timing cover fool

302Army187 · February 18th, 2011, 06:24 PM

why is the battery grounded to the radiator support?!!?!?

timing cover is stock, but you can move it over to the motor mount for a much better ground. thats where mine is.

no wonder your junk is acting up.

Timm10221 · February 19th, 2011, 09:23 PM

I couldn't for the life of me remember where the battery was grounded in the engine bay after I moved it to the rear of the car. I will move it back to the block tomorrow... Would the motor mount work right where the strap is for the block ground to the frame?

302Army187 · February 19th, 2011, 09:33 PM

i mounted mine like this

between the motor and mount.

Timm10221 · February 20th, 2011, 09:38 AM

That's exactly what I was planning on doing.. Cool!

fogged306 · February 20th, 2011, 10:02 AM

You need two grounds. A ground from battery to chassis and a ground from block to chassis. If you ground the battery to the block and have no other ground then you're relying on the engine mounts as a ground for the chassis of the car. The absolute best way to do it is to ground the battery to the frame and the block to the same point on the frame. This will eliminate any potential ground loop.

Timm10221 · February 20th, 2011, 10:34 AM

I already have Ground straps from both sides of the engine on the engine mounts to the chassis and then I had the battery grounded out on the lower part of the front Clip there right by the radiator support. I am now going to ground it to the block sense that seems to be the best way.

93hatch · February 20th, 2011, 02:14 PM

gota have a ground going to once lug on every wheel too

Timm10221 · February 20th, 2011, 02:35 PM

Originally Posted by 93hatch

gota have a ground going to once lug on every wheel too

Naa I did the lug nut Ground delete and got some of those RV Road feelers to put on my back bumper and have a ground to that It looks stylish too

93hatch · February 20th, 2011, 02:36 PM

lol road feelers lol lol lol lol

Timm10221 · February 20th, 2011, 03:20 PM

I thought You'd like that LMAO!!! LOLZ

flyin ryan · February 20th, 2011, 11:15 PM

Originally Posted by 93hatch

gota have a ground going to once lug on every wheel too

LOL

and just an FYI i've had great results grounding the alt case to the frame as well.. I've seen as much as .5 volt increase

93hatch · February 21st, 2011, 12:11 AM

volts are for fags. My car doesnt even have an alt

C MY 4D · February 21st, 2011, 12:17 AM

I use jumper cables to diagnose ground issues all the time. Grounds are your friends....

Did you know adding grounds to a wrx will actually increase the HP? It's one of the their free mods. I usually use atleast two grounds straps from the chassis to the motor and two grounds from the battery to the block.

302Army187 · February 21st, 2011, 07:23 PM

how in the balls would an extra ground on a WRX increase power.

and now that im thinking about it. I might just add a ground to the subframe connectors now that the trans and everything is out. motor will be out this weekend.

Why would you run a ground from the battery to frame, then from the block to the "frame"???

I don't see the problem with running a ground from the battery to the motor mount, then from the motor mount to the subframe connectors? or is there a issue?

Timm10221 · February 21st, 2011, 07:55 PM

I have my battery Grounded out on the block and the block in grounded to the frame and my battery is also grounded to the frame with another cable "same terminal" Is that ok? I didnt see why it would hurt

February 18th, 2011, 01:12 PM	#2
302Army187 Hardcore Enthusiast '89 LX 'Vert 10's or bust... Literally. Join Date: May 2009 Location: Denver, Co Posts: 2,915 iTrader: 0 reviews	meh. I GUESS it would work if that cable itself is the issue. __________________ H/C/I 302 + nitrous for now... supercharger/turbo soon? www.youtube.com/Xarmy187 Please support my YouTube channel! My videos don't disappoint!

February 18th, 2011, 06:20 PM	#5
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	gounded to the fucking support? Im gona beat your fucking ass. Ground it to the timing cover fool __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

February 18th, 2011, 06:24 PM	#6
302Army187 Hardcore Enthusiast '89 LX 'Vert 10's or bust... Literally. Join Date: May 2009 Location: Denver, Co Posts: 2,915 iTrader: 0 reviews	why is the battery grounded to the radiator support?!!?!? timing cover is stock, but you can move it over to the motor mount for a much better ground. thats where mine is. no wonder your junk is acting up. __________________ H/C/I 302 + nitrous for now... supercharger/turbo soon? www.youtube.com/Xarmy187 Please support my YouTube channel! My videos don't disappoint!

February 19th, 2011, 09:33 PM	#8
302Army187 Hardcore Enthusiast '89 LX 'Vert 10's or bust... Literally. Join Date: May 2009 Location: Denver, Co Posts: 2,915 iTrader: 0 reviews	i mounted mine like this between the motor and mount. __________________ H/C/I 302 + nitrous for now... supercharger/turbo soon? www.youtube.com/Xarmy187 Please support my YouTube channel! My videos don't disappoint!

February 20th, 2011, 02:14 PM	#12
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	gota have a ground going to once lug on every wheel too __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

February 18th, 2011, 05:40 PM	#4
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Ground issues can cause all kinds of different problems. Jumper cables isn't a great idea. They aren't that great of a connection at the clamp. Why not just get a few feet of 4Ga and some connectors from a stereo shop and make a couple new grounds. One from the block to the frame and one from the frame to the battery. Should cost you maybe $20-$25 at the most and it's good piece of mind. If you do it, make sure you don't over tighten the bolts, and sand the area down to bare metal for the connections, then paint over it when you've made the connection. I just had the gauges on a truck I just bought doing all kinds of odd stuff. I found that the grounds to both of my batteries were loose. Re-did them and my gauges work fine now. Not saying this is definitely your issue, but it's never a bad thing to have a solid ground and it doesn't hurt to try.

February 20th, 2011, 10:02 AM	#10
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	You need two grounds. A ground from battery to chassis and a ground from block to chassis. If you ground the battery to the block and have no other ground then you're relying on the engine mounts as a ground for the chassis of the car. The absolute best way to do it is to ground the battery to the frame and the block to the same point on the frame. This will eliminate any potential ground loop.

February 20th, 2011, 02:36 PM	#14
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	lol road feelers lol lol lol lol __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

February 21st, 2011, 12:11 AM	#17
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	volts are for fags. My car doesnt even have an alt __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

February 21st, 2011, 12:17 AM	#18
C MY 4D Billy Weston 2003 Cobra 11.14@124.36 Join Date: Aug 2006 Location: Hampton, VA Posts: 4,806 iTrader: 8 reviews	I use jumper cables to diagnose ground issues all the time. Grounds are your friends.... Did you know adding grounds to a wrx will actually increase the HP? It's one of the their free mods. I usually use atleast two grounds straps from the chassis to the motor and two grounds from the battery to the block. __________________ TT Build in progress....... Need work done to your car for a great price in Hampton Roads? Shoot me a PM.

February 21st, 2011, 07:23 PM	#19
302Army187 Hardcore Enthusiast '89 LX 'Vert 10's or bust... Literally. Join Date: May 2009 Location: Denver, Co Posts: 2,915 iTrader: 0 reviews	how in the balls would an extra ground on a WRX increase power. and now that im thinking about it. I might just add a ground to the subframe connectors now that the trans and everything is out. motor will be out this weekend. Why would you run a ground from the battery to frame, then from the block to the "frame"??? I don't see the problem with running a ground from the battery to the motor mount, then from the motor mount to the subframe connectors? or is there a issue? __________________ H/C/I 302 + nitrous for now... supercharger/turbo soon? www.youtube.com/Xarmy187 Please support my YouTube channel! My videos don't disappoint!

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