LSjim

iTrader: (8)

so i have been driving my car around for a while and it is on a speed density tune. Well after a week after the tune the car started bogging in the low rpm's were if i was to give it WOT the car would almost want to die but i could ease on to the gas and it would drive normal. It stayed like that for a week i thought it was the plugs going bad. Then the next week i go to drive it and it will now just start and die. I replaced the plugs and msd wires and it does the same thing just starts and dies. i have no idea what the problem is tune??? Also when i was driving it you could kind of smell raw fuel.. if that helps any lol

Monte4ever

iTrader: (2)

Take it back and get it re-tuned. Do your plugs look/smell like raw gas? It could be dumping to much fuel and stalling you out.

LSjim

iTrader: (8)

yea you could smell the gas on the plugs ... but why would it drive for a week then do that?

Monte4ever

iTrader: (2)

It could of taken a week to foul out the plugs. Are you getting any codes? You could have a bad O2 sensor. I'm new to fuel injection myself so hopefully someone with more knowledge will chime in.

LSjim

iTrader: (8)

Yea I hope so but I called the guy who tuned my car told me to check my fuel pressure Idk if that would cause this

KILLER-LS1

iTrader: (18)

if your fuel pressure was dropping, it could cause similar symptoms, execpt for the raw fuel smell. normally that wont happen when your pump is dying.. id have the tuner take another look at it just to be safe

LSjim

iTrader: (8)

yeah i called him and he said i probley will have to get it retuned but he also thinks it is a dying fuel pump i will have to check my fuel pressure.. thanks for the responses

ls1 1990 VN

You are most likely washing your cylinder bores with fuel, needs to be sorted promptly.

LSjim

iTrader: (8)

okay .. i need to figure this out

chrisfrost

iTrader: (8)

Ok , first locate the fuel pressure test port on You're fuel rail and unscrew the cap and after turning the key on without trying to start it for 5 sec take a screw driver and depress the valve core in the fuel pressure test port but be very careful when You do this turn You're head the other way and close eyes for a cpl sec . If fuel sprays out this port most likely You're fuel pump is ok . which cylinder or cylinders did You remove spark plugs from ?

LSjim

iTrader: (8)

well i dont have a stock fuel rail i have a professional products fuel rail .. but i just ordered a new 255lph walbro becasue i was still using the stock pump so i figured it wouldnt hurt because i had already put 36lb injectors. But i replaced all the spark plugs.