slow_low_eddie

That's somewhat of a video showing what it's doing. I can try to get a better one. The loud noise is no o2 sensor.

TomCat39

Have you checked the Fuel Pressure at the check spot on top of the fuel filter? (Rule out line blockage from tank to filter)

Have you checked the Evap system? There is a two way valve and a Purge Solenoid that can affect the fuel system and the Charcoal canister I believe. (Helps control fuel pressure by releasing extra vapor pressure)

slow_low_eddie

I need to know where I can rent or buy a fuel pressure gauge. Also, a diy of his exactly to do this. I have never done it.

Thanks.

TomCat39

Make sure it's a fuel injection pressure tester not the old classic fuel pressure tester for carb engines. Those typically never went above 15 PSI while fuel injection typically runs 40-45 PSI standard.

Sounds like you could use the Helm's (FSM) Manual. You can pick one up for cheap at helminc.com It will be your bible for the car.

slow_low_eddie

Yeah, I just picked one up from autozone and I'm sure it's for FI motors. Thanks for the link, I just need this car running ASAP. Hopefully someone can simply explain how to use the test kit. Or I'll YouTube.

TomCat39

On top of the fuel filter is that smaller bolt, that is the bolt you remove and screw your tester into. That's the FSM spot for fuel presser testing. Ever wonder why it was a double bolt right there? Now ya know.

slow_low_eddie

You are the man. After examining the kit, I figured it would be the banjo bolt.

slow_low_eddie

Okay, so I tested it.

Results are,

With hose disconnected, 51
Connected 42

I am not within spec, it says it can be a faulty regulator or pinched or clogged line.

I should add, I swapped out the old regulator with one off a GSR because it was all we had at the moment.

slow_low_eddie

The car was not at operating temperature nor was it cold. It was warming up, not sure if that matters.

TomCat39

It shouldn't but the GSR regulator is probably why the pressure is high. I don't have the manual off hand but I suspect the B18 requires a higher pressure to run properly.

slow_low_eddie

So at this point I am completely lost. I'm not sure what the heck the problem is. A buddy was telling me yesterday that the car can be sucking up air if the fuel level gets too low? I want to say the car starts to act funny once it reaches a bit lower of a half tank and under. I will have to double check today.

tony_2018

So when you rev your car does the pressure drop or rise?

slow_low_eddie

Okay. I will try to get a d series regulator at the junkyard. I'm sure they are the same. Regarding z and y series. I didn't rev it la at night since it was 1am and the car is loud lol. I will try again today.

slow_low_eddie

With the hose connected, the psi jumped to 45 when I was giving it gas.

With the hose disconnected, the psi stayed the same as I gave it gas.

slow_low_eddie

Changed the regulator for a d16z6 one and another main relay and it still has the issue. I took another video. Here you can see it stop responding and dying on its own.


I really need to figure this out ASAP. It's my daily and I have spent the past two days trying to figure out what's wrong. Thanks for the help thus far.

slow_low_eddie

Update!!!

So my car had a quarter tank left. I have noticed that it seems to act like a ***** when it's below half a tank. I go to the gas station (still driving like ****), I make it. Put $20, gives me a full tank and boom. Car drives perfectly!

Anyone?!

TomCat39

I've not pulled the fuel pump out but I vaguely recall someone saying something about a crack in the bottom of something in idle conversation about another car.

Basically it gets me to wondering, what is the system used to suck fuel from the bottom of the tank when the fuel gets low. Being it's not baffled and the gas slops all over the place when driving or sitting on inclines, what method is used to grab fuel with a 1/16 or 1/32 tank of fuel. I figure there must be something being the car (mine at least) doesn't have problems starting with reeeeaaally low gas even on hills, facing forward, backward or even sideways.

Could it be an issue with that part of the system?

Another question, when you go to put gas in your car (especially when low) does the tank suck air when you first crack the gas cap?

slow_low_eddie

Thing is, even when it is low on fuel, it starts up no problem. It's just when it drives that she struggles. I'm assuming it's something in the tank. Maybe the device that holds the fuel pump and filter? I had the conversation with the dude yesterday telling me that it may be sucking up something other than fuel, he said oxygen?

JPhilBradley

What is the brown, goo-ey, sticky stuff that is always on older circuit boards in cars? Is it some kind of protective coating they put on the boards that discolors with age, or is it some kind of build-up that should be cleaned away?

JPhilBradley

I would remove the fuel pump and make sure the sock (little filter before the pump) is properly installed onto the pump inlet. Also inspect the pump itself and all lines leading from the pump to the outlet on top of the fuel tank as well.

Sounds like your fuel level gauge is inaccurate...

slow_low_eddie

When I checked the resistance on the float, apparently it was way off! I looked at a diy online. But I was moving the float up and down and it was pretty accurate with the gauge itself. I shall troubleshoot again and check all else.

JPhilBradley

Check the resistance of the wires between the sending unit and the cluster as well.

slow_low_eddie

How exactly do I do that sir?

TomCat39

Run a wire with alligator clips from one point to the other so you can get the continuity measurement of the wire running through the car.

Does your gas cap suck air when you first open it after driving for a while?

slow_low_eddie

Which point to which point? And you mean that sound it makes when it's typically empty? I'll have to drive it around today and see. How long should this while be?