Truck Stutters when Bass Hits

[voltagexdt 10+ year member]

Ok guys / gals

bit of background..

I have been installing for almost 20 years.. Never seen this issue.

I have a 91 Chevy k1500

Im running:

2 3xl PB Subs

XTA 2250D 1 ch Amplifier

2 Yellow Top Optimas

Now when I am slammin the bass, and driving, the truck will literally hickup as the bass hits.

My Digital guage says im not dropping below 13v.

Im running 0ga wire

and this is a single cab truck so the length is not far.

Any ideas?

Truck is TBI

Click to read more...

 

[OmegaBunny 10+ year member]

Where is the meter installed?

 

[-01limited- 10+ year member]

Maybe you're vibrating some wires loose somewhere and causing it. It is almost 22 years old

 

[voltagexdt 10+ year member]

have one on battery, and one hooked to battery however ran inside vehicle.. as well, the main gauge of the vehicle..

 

[voltagexdt 10+ year member]

Maybe you're vibrating some wires loose somewhere and causing it. It is almost 22 years old

didnt think of that, however.. very few wires in the vehicle.. and its just old enough to have barely any vacuum lines.

 

[fivepoints 10+ year member]

are head lights dimming when the bass hits? if so try a battery isolator. you hook it in between the batt bank and the main starting bat's one probelm is finding one big enough if you got a 300 amp alternator if not mite want to consider a bigger bigcouple of things like alt, more batts, isolater, and wire, etc... i seen isolaters that go up to 250 amps for retail. all the isolater does is charge the batts wile not pulling form the starting bat. make it so it will not pull from the front. biggest ****** part is letting it charge long enough for a bass run if you run a isolater. like if in a class that you can not run the car in your s.o.l. then. as you can tell i never liked runing a isolater i find it better with big alts and dual big altsand a batt bank if needed.

 

[skylineTT 10+ year member]

usually the issue is that your current draw from the amp steals a lot of power from the alt. and makes your injection and ignition system weak, causing the car/truck to stutter. My roommates honda has a weak alt and 500w will literally shut the car off. Do the big 3 if you haven't already and upgrade the alt if you have done the big 3.

P.S. TBI is for fail!

 

[voltagexdt 10+ year member]

usually the issue is that your current draw from the amp steals a lot of power from the alt. and makes your injection and ignition system weak, causing the car/truck to stutter. My roommates honda has a weak alt and 500w will literally shut the car off. Do the big 3 if you haven't already and upgrade the alt if you have done the big 3.
P.S. TBI is for fail!

already did the 3..

will try isolator..

also i appreciate your TBI comment, although its far from true.

435 hp.. 21 miles to gallon..

and i dont need a full shop to change them..

but ya thanks for the off the topic opinion.

 

[truckramrod 10+ year member]

what kind of alt do you have?

 

[audiobaun 5,000+ posts]

Time for a HO alt.Especially if the big three been done, and power ground wires are 0ga, and an extra batt installed.Time for the big buck spending of the HO alt

 

[voltagexdt 10+ year member]

k now to through you guys for a loop took a drive, seperated batts from one another.. amp was on secondary, and nothing else.. set it up.. fired it off and stutter..

 

[AnthonyO 10+ year member]

1991 Chevy K1500 are notorious for bad terminal connections on top of the fuel pump. My guess is that the bass hits and causes a disconnect. Check that first.

 

[audiobaun 5,000+ posts]

k now to through you guys for a loop took a drive, seperated batts from one another.. amp was on secondary, and nothing else.. set it up.. fired it off and stutter..

Not to being thrown off...just not enough juice to run that hunger power needing bass amp.You running @a 1ohm load on the subs?What size fuse do you have under the hood?And are you running a Fused distro block at the amps as well?How do you have the secondary battery hooked up from the main battery.Alts big three only on the main?Amp power coming off the secondary straight from the batt, and not the main in line?Have you tried to run the alt big three to the secondary as well?How is it done? Pics of under hood wiring, and power supply

 

[audiobaun 5,000+ posts]

91 chevy alt standard are only 90-105 amps.A140a may work for you,but will have to bore bolt connection to make fit.I helped a friend out on his older chevy truck, and he had a 105, believe his truck is a 94/95?I have a 98,biggest in stock alt at orileys is a 140a,.I helped him put that on his truckl,did the big three and 14.4-14.6 lowest 14v on a low note.

 

[audiobaun 5,000+ posts]

Q=Also,are you running any AGM batts at all?What batts do you have in there?