HELP!! No Fuel going to motor

93coupe1 · 07-16-2003, 05:37 PM

I just converted a 1993 mustang lx 4cyl. to 1989 5.0L MASS AIR
Everything works except no fuel going to motor- In other words the fuel pump isn't even kicking on. I checked the relay and there is juice going to relay and I have checked all my ground wires but something is still out of place. If you can help - feel free to send me a email jlhommel@earthlink.net

Thanks

bigred90gt · 07-16-2003, 09:38 PM

Check the fuel cut off switch (inertia switch). They have been known to cause problems.

93coupe1 · 07-16-2003, 09:48 PM

Can I just cut it off and splice the 2 wires together 4 temporary
I'm getting juice to the fuel pump relay and I jumped the wires on it to bypass the relay. I will try the same with the switch. If that doesn't work anymore recommendations.

bigred90gt · 07-17-2003, 12:02 AM

Quote:

Originally posted by 93coupe1
Can I just cut it off and splice the 2 wires together 4 temporary
I'm getting juice to the fuel pump relay and I jumped the wires on it to bypass the relay. I will try the same with the switch. If that doesn't work anymore recommendations.

I am sure you could, but I dont recomend it. There is a reason for that thing. If you get into a collision, it could be a life saver, but do as you please.

PEPE · 07-17-2003, 12:39 AM

I have a friend that had the same problem as you didand i believe that the fuel pump on the 4 cyl. eng the does not pump same as a 5.0 does. what i did is replaced with a 190iph fuel pump and the problem was fixed.

part # bbk-1606

hope this inf. helps

93coupe1 · 07-17-2003, 01:52 AM

The fuel pump isn't even coming on and there is an annoying buzzer coming from inside the dash - I believe its because the air bag sensors are unplug and maybe that could be linked to the fuel pump. I attempted to reconnect the air bags but the harnesses are different from 4 cyl to v8. We attempted to connect them to what we believe was the connector for the air bags sensors still nothing. So we got in behind the heater controls and found a circuit board of some type and disconnected it and the buzzer went away. But still no fuel pump kicking on.
Tomarrow we are going to run a wire off the hot wire on the fuel pump relay directly to the fuel pump and go from there. If anybody has any recommendations before we proceed please let me know .

Thanks

PKRWUD · 07-17-2003, 03:40 AM

If you have power going to the relay, but you don't have power coming out, try replacing the relay. If you bypass it, you're going to be running way too many amps through your ignition switch. As Caymon wisely mentioned in reference to the inertia switch, it's there for a reason.

bottlebaby91 · 07-18-2003, 01:03 AM

Check to see if you have power on the red wire on the mass air. If there is power you should have a pump. If there is no power to that red wire, there is a brown connector on the driver side near the firewall near the computer hook up, this may have fallen off or come disconnected. This brown connector feeds power to everything in the car fuel related, inertia switch, mass air, injectors, fuel pump, ect.

07-16-2003, 05:37 PM	#1
93coupe1 Registered Member Join Date: Jul 2003 Location: Ohio Posts: 3	HELP!! No Fuel going to motor I just converted a 1993 mustang lx 4cyl. to 1989 5.0L MASS AIR Everything works except no fuel going to motor- In other words the fuel pump isn't even kicking on. I checked the relay and there is juice going to relay and I have checked all my ground wires but something is still out of place. If you can help - feel free to send me a email jlhommel@earthlink.net Thanks

07-16-2003, 09:38 PM	#2
bigred90gt 2 Stangs in the Stable Join Date: Apr 2002 Location: Baytown, TX Posts: 1,209	Check the fuel cut off switch (inertia switch). They have been known to cause problems. __________________ '90 GT Under construction Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!! 04 F-150 STX 4.2L 5 spd Rice Haters Club Member #128

07-17-2003, 12:39 AM	#5
PEPE Registered Member Join Date: Jul 2003 Location: San Diego Posts: 6	fuel I have a friend that had the same problem as you didand i believe that the fuel pump on the 4 cyl. eng the does not pump same as a 5.0 does. what i did is replaced with a 190iph fuel pump and the problem was fixed. part # bbk-1606 hope this inf. helps

07-17-2003, 03:40 AM	#7
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	If you have power going to the relay, but you don't have power coming out, try replacing the relay. If you bypass it, you're going to be running way too many amps through your ignition switch. As Caymon wisely mentioned in reference to the inertia switch, it's there for a reason. __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Confused, I need help on different fuel pump wiring methods.	5.0 Fiend	Windsor Power	12	10-14-2004 06:43 PM
Gt-40 motor timing problems? and smoke	drtbiker	Windsor Power	0	09-22-2002 10:01 PM
EEC does not energize unless key turned to start	crazypete	Windsor Power	23	09-20-2002 09:00 AM
Anyone have a external Aeromotive or Cartech fuel system please help	Stang_ROTY	Windsor Power	8	07-23-2001 11:17 AM
Lack of Power from issue with Fuel System	cobra94	Windsor Power	1	07-04-2001 02:38 AM

07-16-2003, 09:48 PM	#3
93coupe1 Registered Member Join Date: Jul 2003 Location: Ohio Posts: 3	Can I just cut it off and splice the 2 wires together 4 temporary I'm getting juice to the fuel pump relay and I jumped the wires on it to bypass the relay. I will try the same with the switch. If that doesn't work anymore recommendations.

07-17-2003, 01:52 AM	#6
93coupe1 Registered Member Join Date: Jul 2003 Location: Ohio Posts: 3	The fuel pump isn't even coming on and there is an annoying buzzer coming from inside the dash - I believe its because the air bag sensors are unplug and maybe that could be linked to the fuel pump. I attempted to reconnect the air bags but the harnesses are different from 4 cyl to v8. We attempted to connect them to what we believe was the connector for the air bags sensors still nothing. So we got in behind the heater controls and found a circuit board of some type and disconnected it and the buzzer went away. But still no fuel pump kicking on. Tomarrow we are going to run a wire off the hot wire on the fuel pump relay directly to the fuel pump and go from there. If anybody has any recommendations before we proceed please let me know . Thanks

07-18-2003, 01:03 AM	#8
bottlebaby91 Registered Member Join Date: Nov 2002 Posts: 141	Check to see if you have power on the red wire on the mass air. If there is power you should have a pump. If there is no power to that red wire, there is a brown connector on the driver side near the firewall near the computer hook up, this may have fallen off or come disconnected. This brown connector feeds power to everything in the car fuel related, inertia switch, mass air, injectors, fuel pump, ect.