• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

3400 sfi H.O.

S

simpson66

New member
need some help with a 99 pontiac grand am gt H.O. 3400 sfi. Its starting rough due to low fuel presure. it has a new fuel pump and the fuel lines have all been ran through. and for some reason all of the lights on the dash are on. Feel free to leave any advise thanks
 


Junk pump replacement?

You said the lines have been ran through, assuming you have a new fuel filter as well?

Maybe there is a clog in the rail or...start checking fuses/relays/wiring to make sure its getting a solid connection.

Also, this section is for the 3.4 DOHC...I'll move it for you
 
Did you replace the fuel pump?

Is it running rough all the time, or just idling?

Does it cut out when driving?

What all codes are showing up?
(Go to a close auto place, they have scanners you can use for free to check codes, write each down Pxxxx - description, come back and well go from there)
 


I had a problem getting a 3100 running at start up and it was a lazy fuel pump. It's possible you got a bad one.
 
You must log in or register to reply here.
Back
Top