voltage problems

[Falcons 5,000+ posts]

i just did the big three. it was a success. however, when i turned on my car, my voltage is all messed up. First, here are the pics of the big three, tell me what you think:

Now to the voltage...When i start my car, the rpm's run real low and the car sounds like its gonna bog out and die. the voltage gets as high as 14.5 when i am driving, and drops as low as 13.2. Its wierd. The alt isnt bad because i tested it out with a dmm. the rpms also idles up to 2000 and as low as 400, what is up with this? here is a vid. This isnt even as bad as usual:

[video=youtube;pl_-DM43q0s]

Click to read more...

 

[Falcons 5,000+ posts]

one pic didnt show up, here is the chassis ground:

 

[Falcons 5,000+ posts]

anyone?

 

[subzero 5,000+ posts]

you need a better ground connection. use a bolt. and I would also suggest makin sure your not crossed anywhere.

 

[Dirtrider4eva 10+ year member]

did you completely replace the factory ground and alternator power? some cars require the stock ones to be on regardless due to sensors and what not.

ive dealt with this however too.

 

[subzero 5,000+ posts]

 

[Falcons 5,000+ posts]

my ground is a bolt with a screw top, with a nut on the bottom side of the chassis. The ground to the alt casing (used for the engine block ground). If the gorund on the alt casing and the power from the alt are crossed could that cause this?

 

[Dirtrider4eva 10+ year member]

i just checked my voltages. are all good. 12.6 batt when off.

charges to 14.14 and its close to 95 degrees out.

so not bad.

im not sure.

try recconecting the stock alt power and the alt to bat wire. see if it helps.

 

[Falcons 5,000+ posts]

all the stock wire is still connected. i just added the big three wires. should i reroute the engine block ground so it doesnt cross with the power wire?

 

[Dirtrider4eva 10+ year member]

idk if thats an issue. mine looks like this though.View attachment 26526383View attachment 26526384

cant see the engine ground, for its practically under the left hand side of the engine. the Batt to ground is roughly 3 inches. lulz.

and the alt pos, is maybe 4 feet. no problems what so ever.

ironically my Intake had a random mount plate on it, so thats where the fuse is.

the extra wire is just the engine groundd as a reference of how pathetic the factory is. i took it out.

 

[Falcons 5,000+ posts]

looks good man. my car almost sounds like it is struggling to keep a proper rpm and voltage

 

[sacsking916 5,000+ posts]

all the stock wire is still connected. i just added the big three wires. should i reroute the engine block ground so it doesnt cross with the power wire?

shouldnt make a difference. the wires will be fine next to one another as long as the strands are touching

 

[Dirtrider4eva 10+ year member]

rice rice baby.

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well.. if its not what i suggested.. you got me beat.

 

[Falcons 5,000+ posts]

basscort2009 told me that when he did the big three on his zx2 his car did the same thing. he said it corrected itself over a couple of days, but i just wanted to get a second opinion.

 

[Dirtrider4eva 10+ year member]

mine originally did experience some drag. when i floored it the rpms were bouncy, but after 10 minutes i floored no problems.