Truck Stutters when Bass Hits

[voltagexdt 10+ year member]

Your going to ignore my posts...

Thank god

ECM is in glove box. That's a total idea.

 

[jasonbillnelson 10+ year member]

Check the fuel pump. Whether the connections there are iffy or your massive bass isn't allow it to function properly. It's a 91 chevy, probably wouldn't be a bad idea to drop in a new fuel pump anyways.

 

[ThatChevyGuy 5,000+ posts]

Fuel pump ground has come loose or maybe the relay got weak from voltage drop i went through a **** ton. Just some suggestions.

 

[voltagexdt 10+ year member]

ok, now the symptoms have isolated a bit more... its not so much loud.. i was running at normal volume.. but a new song came on low tone bass.. stutter..

imma check fuel lines and pump..

gonna check bcm..

also havent tested this without truck moving.

will do that as well.

Also a quick jab at Skyline.

first I own a car audio shop..

So this isnt a hobby.

Furthuremore, You never stop learning.. and asking others for advice is how opened minded people work.

Lastly, I had an 88 honda prelude, set records with it.. sponsored by SoundStream.. guess what.. twin draft carburators.. and hmm didnt have this problem..

So to the people helping me with ideas, much appreciated.

And like every other forum. theres always someone who thinks hes god of the forums.. and people kinda laugh at him..

 

[jasonbillnelson 10+ year member]

more than kinda laugh....hahaha....but ya good luck with it man....definitely want to know what the issue is.

 

[voltagexdt 10+ year member]

Was a bad o2 sensor.. Something in the bass, caused it to act out. weird...

 

[jasonbillnelson 10+ year member]

well again, it's a 91 chevy so an O2 sensor among other things could probably use replacing. Glad you got it figured out though!

 

[JoeK 10+ year member]

Was a bad o2 sensor.. Something in the bass, caused it to act out. weird...

Hm, i have 2 bad o2 sensors in my car and i dont have a problem, lol. Well, when a low note hits i can hear the exhaust make weird noises like being funelled, but nothing stall worthy

 

[voltagexdt 10+ year member]

i think the o2 sensor has a way of messing with the bcm.. not sure as im no mechanic.. but i found out it was this because tonight it did same thing.. but had no bass but got a cel.. grabbed my paperclip and thats what it says is wrong.. ill change and see what happens..

 

[JoeK 10+ year member]

i think the o2 sensor has a way of messing with the bcm.. not sure as im no mechanic.. but i found out it was this because tonight it did same thing.. but had no bass but got a cel.. grabbed my paperclip and thats what it says is wrong.. ill change and see what happens..

OBDMII meter works great. I dont think your truck has it seeing as its older than 1996, but for others who may hthink they have a similar issue, buy an OBDMII and plug it into your cars computer. It works for any vehicle over 1996. The plug is usually under the steering wheel, located within 12 inches of either left or right side.

Thing immediately told me low voltage bank in the o2

 

[voltagexdt 10+ year member]

ya, and on obd1 a paper clip will tell you the codes.. have to count the blinks.. but works nonetheless.

 

[voltagexdt 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.

Turns out, this is exactually what it was... I thought o2.. then it started doing it again... so i went through everything.. except anything behind the cab. then just decided drop the tank.. whoever owned this truck before me decided to cut the fuel pump wires and reconnect them with wire nuts.

anyhow you were spot on.

 

[AnthonyO 10+ year member]

Good deal, at least you finally got it taken care of.