What all can under-drive a motor?

[Brian95SVT]

You say bass? You have subs? Your alt is bad or your amp is huge. Everytime my subs hits when I have it up loud which is never, and have my lights on, they dim. I'd say check your alt.

No i don't have subs.
Mach 460 system has bass if you have an aftermarket cd player you can set them.

my alt is BRAND NEW and already checked....

i feel like all i'm doin is repeating myself...

i'm tellin ya... all the basic stuff i knew to do and already did it...
that's why this is bothering me.. cuz i don't know what else it could be

 

[realitygt]

if you said your battery is good and your alt is good, then they only thing that can be is you have a wire grounding out or something or something drawing wayyy too much current.

 

[Brian95SVT]

if you said your battery is good and your alt is good, then they only thing that can be is you have a wire grounding out or something or something drawing wayyy too much current.

well how can i test that?
is that the ohm thing J.R. was referring to?
and what are they supposed to be reading so i know...

i just want this fixed....

 

[mike97gt]

get a multimeter and test the whole charging system. check volts and amperage coming from the alt.
then check the grounds for any high resistance's (OHM's)

basically check for anything that doesnt seem right. but with it not always happening its gonna be hard to figure out.. electrical isnt ever that much fun. haha.
good luck

 

[Brian95SVT]

get a multimeter and test the whole charging system. check volts and amperage coming from the alt.
then check the grounds for any high resistance's (OHM's)

basically check for anything that doesnt seem right. but with it not always happening its gonna be hard to figure out.. electrical isnt ever that much fun. haha.
good luck

i know it sucks.... it's gettin old and my dad is all like "well i don't know what to tell ya" and no one seems to care and i don't know how to fix it so i posted here.

but, i think i found my very tiny exhaust leak
my car was warmin up and it was a little cold out and i just happened to be lookin under my car after i started it and there was a little mist of white smoke *from the car being cold ya know* comin out of one of the flanges so that made me happy

 

[Jrgunn5150]

Anyone who knows how to use a multimeter will be able to help you track it down. If you need to go get one yourself, I can teach you how to use it, but it's kinda long, and it would be this weekend before I could type that much :thumb:

 

[Brian95SVT]

Anyone who knows how to use a multimeter will be able to help you track it down. If you need to go get one yourself, I can teach you how to use it, but it's kinda long, and it would be this weekend before I could type that much :thumb:

ima have to get some friends to check it out

 

[vermilion]

i wish i could get your car on base to put it on the lift... i bet wed find several issues with your car there. they have all the tools too. chris has my manual. im telling ya man, im guessing your grounding somewhere. in tranny or somewhere. it seemed to do it while you quick shifted between nuetral and drive.

 

[Brian95SVT]

i wish i could get your car on base to put it on the lift... i bet wed find several issues with your car there. they have all the tools too. chris has my manual. im telling ya man, im guessing your grounding somewhere. in tranny or somewhere. it seemed to do it while you quick shifted between nuetral and drive.

uhh no... it does it when i'm drivin
the reason it does it when the transmission is in gear is because it's puttin an extra load on the motor and when i put it in neutral it doesn't have that load anymore so it helps. has nothing to do with me shifting man, you think that's hurtin stuff so much but it's not as bad as you think

 

[Mr. OAM]

I am not so sure it's an electrical thing.

As far as the needle moving whenever you turn something else on that is normal, especially at idle. As far as the needle bouncing when the 460 system bass is on, that is also normal. That system in general can pull some amps.

Since your car stalls when you put it in drive, does it seem to have less power than it used to when you are driving around? When you give it the gas does it seem to have a "hollow" feeling, the engine seems to be waiting for something, or are you waiting for it to go?


The engine stalling when put in drive can be related to several other things than just the charging system. It can also be due to timing not being right. Your TPS could be having problems. The IAC could be dirty. Check out this article for some things to check and do to remedy the situation. It's not the right generation car or engine but the system is the same.....

http://www.muscularmustangs.com/iac.php


Steve

 

[Bluesn95]

Also, don't forget to check for vacuum leaks.

 

[Brian95SVT]

I am not so sure it's an electrical thing.

As far as the needle moving whenever you turn something else on that is normal, especially at idle. As far as the needle bouncing when the 460 system bass is on, that is also normal. That system in general can pull some amps.

Since your car stalls when you put it in drive, does it seem to have less power than it used to when you are driving around? When you give it the gas does it seem to have a "hollow" feeling, the engine seems to be waiting for something, or are you waiting for it to go?


The engine stalling when put in drive can be related to several other things than just the charging system. It can also be due to timing not being right. Your TPS could be having problems. The IAC could be dirty. Check out this article for some things to check and do to remedy the situation. It's not the right generation car or engine but the system is the same.....

http://www.muscularmustangs.com/iac.php


Steve

yeah it kinda sputters but it's always done that... hasn't shut off before until last week.... and it still happens almost every day... try drivin like this... IT SUCKS....

 

[Brian95SVT]

i've cleaned everything
i will clean my IAC soon though just incase i didn't do it good enough first time around
but my car has NEVER done this
i mean like never even jumped when i was playin music before until recently cuz it's dyin...

 

[Brian95SVT]

so i put a mulitmeter to it and my battery amped at 12.30s with my accessories on and at idle in drive it was like 12.70s......

 

[reivaxtorres]

ok, quick recap.

1) is any of the radio equipment aftermarket? i think you mentioned that the headunit is, right?
2) only does this when in drive, not when in neutral or park, right?
3) when it shuts down, what is on, electrical wise?
4) do you have a tune on the car?

it seems to me that something is drawing an extreme amount of power from the battery when the trans is in gear. how long ago did it start doing this, and have you added any mods since then, or recently enough to when it started messing up?

have you checked the TPS yet? (TPS = Throttle Position Sensor). if this starts acting up, it can screw up the amount of air that should be entering the engine and cause the idle to drop too much, which with all the other accessories you have on could cause your car to stall.

check all the bulbs on the car, mainly exterior ones, make sure there isnt any rust or anything that could be causing something to arc and draw more power than it should.

go out during the night and find a dark area, pop open the hood, and see if you see any fireworks around the coils. coils could be going back (not likely, but a possibility) and drawing too much power. the reason i say go out during the night to a dark area is because this way, you can visibly see sparks coming from the coil packs, whereas any light would inhibit your ability to do so easily.


hopes this helps.

 

[Brian95SVT]

ok, quick recap.

1) is any of the radio equipment aftermarket? i think you mentioned that the headunit is, right?
2) only does this when in drive, not when in neutral or park, right?
3) when it shuts down, what is on, electrical wise?
4) do you have a tune on the car?

it seems to me that something is drawing an extreme amount of power from the battery when the trans is in gear. how long ago did it start doing this, and have you added any mods since then, or recently enough to when it started messing up?

have you checked the TPS yet? (TPS = Throttle Position Sensor). if this starts acting up, it can screw up the amount of air that should be entering the engine and cause the idle to drop too much, which with all the other accessories you have on could cause your car to stall.

check all the bulbs on the car, mainly exterior ones, make sure there isnt any rust or anything that could be causing something to arc and draw more power than it should.

go out during the night and find a dark area, pop open the hood, and see if you see any fireworks around the coils. coils could be going back (not likely, but a possibility) and drawing too much power. the reason i say go out during the night to a dark area is because this way, you can visibly see sparks coming from the coil packs, whereas any light would inhibit your ability to do so easily.


hopes this helps.

1) only thing aftermarket is my radio, the rest is the stock 460 system (and i'm even missin the 2 door speakers cuz they blew and i haven't replaced them)
2) yes, it's mainly when it's in drive. now the needle was jumpin around a little in neutral but that was the first time. it's mainly when i'm in drive
3) sometimes its JUST my radio, sometimes it's all my accessories... depends
4) nope, stock tune.

it just randomly started doin it one day and i haven't done any mods to it... which is one of the things i was thinkin bout but i haven't done anything to make it do this (unless washin and waxin mod messed it up HAHAHAHHAHAH)

never checked the TPS... didn't even know what it was till last night. i will look into that... when i check it... what am i lookin for?!?
what does it look like? where is it at?!?

nothing is rusted so nothing like that
i hear this ark/pop noise from under my hood every so often but can't pinpoint it since i'm not under there when it happens
it's sometimes RIGHT when i start my car and tohers its randomly but it's RARE

no fireworks

 

[reivaxtorres]

yeah, the TPS is a black electrical thing thats located on your throttle body. if you look at it, on one side of the throttle body (closest to the firewall) you have where the cable hooks up to it, right? on the other side of the throttle body, you will have the TPS. you need to get that multi meter (volt meter, ohm meter, same thing) and test it to make sure its still within paramaters. i dont know what these are, i can try looking for them tho.

also, have you tried unplugging your radio and then seeing if the problem persist? when i was trying to do the CD6 swap into my car, the headunit would draw too much power to the point where the radio would cut off if i hit the brakes. maybe yours is doing something similar, but internally on the headunit. i would say disconnect it completely and see if the problem remains

 

[Brian95SVT]

yeah, the TPS is a black electrical thing thats located on your throttle body. if you look at it, on one side of the throttle body (closest to the firewall) you have where the cable hooks up to it, right? on the other side of the throttle body, you will have the TPS. you need to get that multi meter (volt meter, ohm meter, same thing) and test it to make sure its still within paramaters. i dont know what these are, i can try looking for them tho.

also, have you tried unplugging your radio and then seeing if the problem persist? when i was trying to do the CD6 swap into my car, the headunit would draw too much power to the point where the radio would cut off if i hit the brakes. maybe yours is doing something similar, but internally on the headunit. i would say disconnect it completely and see if the problem remains

ive had this cd player for 3 years
everything in my car that hasn't been replaced has been in the car since i got it 3 years ago and i've replaced alot but other things i haven't and this has never happened

 

[reivaxtorres]

well things do go bad over time. when i first started installing that CD6 headunit, everything worked fine. after driving around for a few days, the problems started. maybe yours just went bad over time?

what kind of head unit is it?

 

[Brian95SVT]

well things do go bad over time. when i first started installing that CD6 headunit, everything worked fine. after driving around for a few days, the problems started. maybe yours just went bad over time?

what kind of head unit is it?

Pioneer maybe?
I forget
It does shut off sometimes *the screen but everything else keeps playing*
but the car still does this EVEN when the radio is off so it's not the radio