Help!!backfire problem

[CHEVROLADE]

plug pictures first would be my first move

if you are injesting coolant it will do as your saying, if youre timing chain came loosse you would throw a code. Going WOT with any issue is flat out stupid as it can cause you a permanently hurt motor.

I would get a damm scanner on that truck and log it before id do anything

ill remove em tomorrow and get some pics up,as for the coolant wouldnt the reservour level get low,cause it aint.when the light comes back on ill get it scanned at autozone see whats up....till then i have to wait till the 14th to get the Hp tuner on it

[George C]

ill remove em tomorrow and get some pics up,as for the coolant wouldnt the reservour level get low,cause it aint.when the light comes back on ill get it scanned at autozone see whats up....till then i have to wait till the 14th to get the Hp tuner on it

it only takes a small amount to cause a misfire/backfire/pop. over time you would see a level drop
none of us are trying to be smartasses just trying to help you before you hurt the motor

[CHEVROLADE]

no problem at all will tear it up in the am or wait till the lite comes on then go get it read ...the light has to be on right n order to read a code?

[kerrige]

The light has to come on but it could turn off doesn't mean its fixed it will still be in the history.

[CHEVROLADE]

put the scanner on her a while ago

threw..

PO175
PO174
PO172
P2635-low fuel pump performance??
P060E-fuel pump control module??

so should i still tear it down and check the tensioner?

[pl4yboy]

put the scanner on her a while ago

threw..

PO175
PO174
PO172
P2635-low fuel pump performance??
P060E-fuel pump control module??

so should i still tear it down and check the tensioner?

Wow. I hope it isn't the fuel control module.

[CHEVROLADE]

Wow. I hope it isn't the fuel control module.

where is it located,is it the black box under the bed?

[farmtruc]

lean condition back fire. time for a new pump, then just bypass that fpcm.

[CHEVROLADE]

damm...wouldve never thought ide need a new pump.

[6669c10]

yup same problem i had ...i had nelson's put a new pump and it worked perfect after that