Question-------------------------
Followup To
Question -
I was wondering where the fuel relay switch was located on my car. I started it one day, backed out of the driveway put it in drive and it died. Hasn't started since then. The pump is working and we have spark, it just won't fire up.
Answer -
If you can HEAR the fuel pump run during this below test, Your problem is NOT the fuel pump relay or fuel pump.
Fuel pump test:
1. Get yourself a helper.
2. remove the gas cap.
3. have one person listen in the gas tank at the gas cap opening.
4. have the other person turn the ignition switch to the ON position ONLY so as the dash lights come on. Do NOT attempt to start the engine.
5. As soon as the ignition key is turned to the ON position, The person at the gas tank should hear the fuel pump run for TWO SECONDS and then it should STOP.
6. Does it ?.
If you do NOT hear it run, in most cases the fault is the fuel pump or the fuel pump relay.
Here is how the fuel pump circuit operates:
As soon as you turn ON the ignition switch to start the engine a 2 second ONLY battery voltage signal is sent from the computer to the fuel pump relay and from the relay back to the fuel pump in the fuel tank. This runs the fuel pump for ONLY 2 seconds of which pressurizes the fuel system in preparation to start the engine.
Once the engine starts, The computer BYPASSES the fuel pump relay and sends constant contionous battery voltage from the computer to the oil pressure switch of which is now CLOSED because the oil pressure is UP because the engine is running. Therefore the battery voltage flows thru the oil pressure switch back to the fuel pump to run the fuel pump constantly until you turn OFF the engine.
If you are mechanically inclined and can follow some diagnostic charts and read some simple electrical schematics, Then you need to contact me at:
onlineautohelp@msn.com
NOTE: This ALL EXPERTS website is NOT mine and I am only a VOLUNTEER helping answer BASIC simple questions to those in need and this website does not allow pictures to be sent and or received.
Please include all of the information, MAKE, YEAR, MODEL, Engine size, and all necessary other information that you previously provided as well as the information that I just gave you when you contact me.
I also need to know ALL PREVIOUS REPAIRS performed on the vehicle.
autohelp
let me know.
autohelp
I talked to my husband and he said the fuel pump did not work when plugged into the wiring, but it did work when he hooked it up direct to the battery.(we have a new fuel pump, and we checked both of them and they work fine.)
AnswerThen you must have a wiring problem at the rear tank electrical connector or at the fuel pump.
I can provide you with electrical schematics and diagnostis charts to test the wiring system.
However, You will need to contact me at:
onlineautohelp@msn.com
In order for me to provide you pictures and procedures to fix your problem.
NOTE: This website is NOT mine and I am only a VOLUNTEER helping answer BASIC simple questions to those in need and this website does not allow pictures to be sent and or received.
Please include all of the information, MAKE, YEAR, MODEL, and all necessary other information that you previously provided as well as the information that I just gave you when you contact me.
