cb7 dies when under half tank??

[slowaccord]

Okay, so I have a stock cb7 dies when under half tank whenever I go to slow down at a stop light it dies when I put more gas in it it runs perfect..any ideas??

[slowaccord]

Alright thanks let me know,this sucks I've also been running very hot and have to have the heat on full blast and I wired the cooling fans on to a toggle. Just to keep it half way cool any ideas??

[kellogg_racing_]

How Many miles are on it? I've heard our fuel pumps rarely go bad, but it could be the relay? I know on my old Dodge conversion van, the car dying out at about half a tank was definitely symptoms of a fuel pump, but i haven't heard of many people reporting their cb fuel pump going bad. Could be. There are def procedures out there for testing your fuel system. Here are some basic techniques that were simply outlined in the sticky.
http://www.cb7tuner.com/vbb/showpost...05&postcount=1
So definitely check everything else before you rip the tank out and see if your pump is bad (ie: relay, fuel regulator, injectors). Hope this helps some! I'll also see if I can't find some about fuel system diagnostics...

[wed3k]

lol, the fuel pickup probably fell off. if it runs absolutely perfect above half tank, im pretty sure it is the pickup. i installed an aftermarket pump and the fuel pickup was too short by about an inch and the car began to cutout around 220 miles on a tank.

[Lakersfan24]

Sorry to jump in your threa an ask questions, but what's the Fuel pick up?

[wed3k]

it picks up fuel.

[slowaccord]

It just rolled 129,000 last night it starts to run like crap at around 250 miles on the tank I squeezed 289 out of it and got sick of it dying haha put more gas in and runs perfect.. thanks for the imput guys ill check some of that stuff out

[wed3k]

witnessed it on a mazda 626 because they use a series of plastic connectors and it fell off which made the car stumble below half tank.

[Evil_cb7]

is it possible its just fuel presser?

[slowaccord]

is it possible its just fuel presser?

The fuel pressure is fine. I'm going to let it run under half tank again and see if it acts stupid again filled it up a couple hours ago. Ill let you guys know if it does it again. I checked all the injectors are fireing fine, ran compression test 160 straight across the board. Seafoamed it,and put some gumout injector treatment in it and advanced my distributer a little, seems to be running better. I'll let you guys know if it runs dumb again afterwards

[slowaccord]

I also checked my fuel pressure regulator I took the vaccum line off from the plenum and it didn't smell gassy so that's good too..

[cloudasc]

So after your gauge gets the halfway point the car stalls out until you add more gas. How many gallons of gas does it take to "fill up the car" when the gauge says halfway? I'm thinking the problem is with your gauge itself, or at least the float in the tank is messed up. I'd get about 300 miles to a tank when running my a/c on the car. I would also do a full tuneup on the car, as you should be able to drive farther on a full tank.