I don’t think it’s getting fuel. I can start it with starter fluid. It runs for a few seconds and dies. I’ve tried changing the fuel filter and I swapped the ac relay with the fuel pump relay. I hear a buzz but it sounds more like a hum to me but I don’t hear a click that I’ve read about here.
Thanks Patrick, I just watched a YouTube vid on how to check the fuel pressure. Question: I have a pressure gage, can I just use that or is there something special about a fuel pressure gage?
I have a pressure gage, can I just use that or is there something special about a fuel pressure gage?
How does it connect? On the 2.8 there's a fitting on the fuel rail right up by the intake that looks like a tire valve (with a cap on it). A fuel pressure tester just screws onto there.
How does it connect? On the 2.8 there's a fitting on the fuel rail right up by the intake that looks like a tire valve (with a cap on it). A fuel pressure tester just screws onto there.
What I was asking is if I could use a compression gage -used to check cylinder pressure by removing a spark plug. I’ll just by another item -that I’ll probably never use again.
Hey IMSa GT, can you do me a favor and post a pic of the area I’ve circled? I know I don’t have the correct hose connection but have never found a good reference photo
Oh and to answer your question, I don't think you can use a compression tester for fuel since the compression tester tests air, they have no seal between the gauge and hose. If you try to test fuel, I believe you'll fill up the gauge with fuel.
[This message has been edited by IMSA GT (edited 07-31-2022).]
To rule out the fuel pump relay (as this procedure will bypass it) apply 12v to the fuel pump terminal of the ALDL port. (You can use power from the cigarette lighter.) If your pump doesn't run, you'll be needing to drop your tank.
[This message has been edited by Patrick (edited 08-15-2022).]
Okay, doing this, I hear the pump, so I need a new relay?
For testing purposes, you can swap over the other relay located right beside it on the firewall. [EDIT] Looking back at your first post, I see you've already swapped over the relay. It's possible I suppose that both relays could be bad, but rather unlikely IMO.
Keep in mind, that even if the fuel pump is running, there may not be sufficient fuel pressure.
What's the fuel pressure when you're bypassing the relay?
[This message has been edited by Patrick (edited 08-16-2022).]
So I triggered the fuel pump and tried to start it and still nothing registered on the gage. This will probably sound like a stupid question but my fuel pressure gage has a t connection with a clear tube coming off of it, the t has a push button, is this to drain fuel? Could I be using the gage improperly?
The button on the gauge is to relieve fuel pressure before disconnecting it... but it sounds like you have no pressure to relieve.
Have you tried disconnecting the fuel line to see if there's any fuel at all being pumped? You could even just push the center pin in the fuel line Schroeder valve to see if any gas squirts out.
And this may seem obvious, but people get fooled all the time. Is there gas in the tank... enough to immerse the fuel pump pickup?
When I changed the fuel filter I didn’t know what to expect as far as how much fuel would come out, not much did, but I thought maybe it’s a back pressure thing, idk. I believe the fuel gage is a little above an 1/8th of a tank. I’ll add some more fuel to be safe and I’ll check the valve tomorrow. Thanks for your advice.
When I changed the fuel filter I didn’t know what to expect as far as how much fuel would come out, not much did, but I thought maybe it’s a back pressure thing, idk. I believe the fuel gage is a little above an 1/8th of a tank. I’ll add some more fuel to be safe and I’ll check the valve tomorrow. Thanks for your advice.
So I read a few other post while trying to figure out more about the fuel pump circuit and one of the post refer to the ecm and to make sure the SES light lights up when the ignition is on. I tilted the steering wheel down so I could get a better view of the instrument lights and there was a dinging sound. If I move the steering up, it stops. When I tried to start it, it sounded like it got some fuel made it to the carb, so I turn the ignition off and on to prime it and it started.
Could be the gauge, could be the sender. There are plenty of threads here covering how to check/repair both.
Don't feel too bad about getting fooled by an incorrect fuel level reading. I've owned Fieros for 25 years... and I ran out of gas while driving my Formula a few months ago. lol
lol
