PneumaticTire

Ok, I am at a loss. Today on the way to work, my car just shut off. Wouldnt restart. I found the fuse with the Oragne/blk wires blown. 20 amp. This is the fuse up by the passanger fender near where the battery is. I put another fuse in, and it blew it. I then unplugged the orange wire from the connector that is just a foot or so away from the fuse holder, and put another fuse in the holder. I plugged back in the connector, and it blew the fuse. Next I checked inside the fuse holder, and all is well. No corrosion, and the dielectric grease is still in it, and its clean. So this time I unplugged the fuel pump relay, put another new fuse in, and plugged back in the relay. Fuse didn't blow, and the car started. It acted as if it was having a hard time ideling on occasion, and also hesitated under acceleration. The SES light also flashed like 2 times while driving it home. I went to pull the codes out, and there are none stored. What do you guys suggest? I am still learning all this wiring stuff. I know the basics. HELP!

P.S. Is it plausible that my oil/fuel pump switch or fuel pump relay stuck closed sending too much power through the system, hence causeing the fuses not to blow once I disconnected it? Maybe my oil/fuel pump switch stuck closed? HELP!

Trickster

Check the wiring going into the fuel pump relay and the other relays there to see if there are any bare wires. I had a problem once with the fuse blowing up by the battery, turned out to be some bare wires to the fuel pump relay. Repaired them and haven't had the problem since.

PneumaticTire

Thank you for the suggestion Trickster, I'm gonna check it out later today. I will replay back later.

UnderKule

I believe that fuse by the battery is for the ECM isn't it? and it is in the ignition/starting/charging system. But i'm not sure exactly what fuse you are talking about.

J.P.

Trickster

The ECM is one of the items that it powers, it also powers the fuel pump relay, the MAF power relay, the MAF burn-off relay, to name a few.

PneumaticTire

Ok guys, heres the latest. I hooked up my fuel pressure gauge, and turned the key in the on position. It built pressure quickly, holding at about 38psi. Then after i turned off the key, it started dropping at a rather quick pace. Clear down to about 22 psi. Now I do realize this is not good. Pressure shouldnt drop no more than what, 5 psi over say several hrs? So, I checked the resistance in all my injectors. They all Ohmed out at 16.4-16.6. So that tells me that my injectors are good as far as that goes. However, I am down to thinking my injectors need a round trip up to the boys at Cruzin Performance for a sonic cleaning and rebuild. The car also stumbles when I give it gas, and the fuel pressure actually increases up to 50psi suggesting I got me some clogged injectors. AM I CORRRECT IN MY ASSUMPTION? I have a bottle of Sea Foam that I am gonna wait and see if you guys think I should try it. I also bought a new fuel pump relay at work today. AC Delco.

P.S. I work in a dealership, and when I first got the car I put top engine cleaner in it, and already tried to clean the injectors. And I can't make that fuse blow again, so I dont know what the deal with that is.


Ok I went out and the first thing I decided to do was verify the fuel pressure readings one more time. This time I hooked up my gauge, and hit the key. Pump primed, however the pressure built up slowly this time and stopped at 21 psi. I tried starting the car, and it idled with a intermittent miss. I pulled open the throttle some, and it bogged and would then increase in RPM and the fuel gauge barely went up. I am thinking fuel pump. 95% sure of it now. What do you guys think of this? I'm still gonna send my injectors out for sonic cleaning and flow testing to Cruzin Performance though anyway. I imagine the car could definitely use it regaurdless. 95k on it, and it sat in a barn for 6 years. LOL.

As a side note, I did all kinds of wiggling with wires connected to the fuel pump fuse by the fender and still cannot get it to blow again. I found the cover for the holder too down next to the battery lol. At least I can cap off the fuse again and remount it on the fender well.

juansupreme

Hey,
I got this other problem that started 2 weeks ago.
I was using a DC 2 AC converter while the car is parked and running(no radio on) and sanding the paint off

the car.
The DC 2 AC converter stated overload, so I looked at the gages in the car and the voltage was at 18 volts.
So I tunrned off car and turned it back on and it was normal 14 volts.

So now when I drive the car or its Ideling and temp hits 220 the voltage stays at 18volts.
Fan is on, no lights on in dash I am totally stump.
It only happens when temp hits 220

Do You got a clue?

Eats5.0's

iTrader: (1)

Sounds like a fuel pump going, for sure. My car wouldn't even start with less than 40psi, much less 21. A good clue to me was the pressure bleeding off, sounds like the diaphragm.