my cougar cranks but no fuel is going to the fuel injectors. i dont hear the inline and in tank pump turn on with the key in the start position. what could be wrong? could both fuel pump out at the same time?
1- check the little ground wire up near the battery
2- ground the tan / light green wire either on your EEC self test connector or on the fuel pump relay in the trunk.
turn on key,,listen for pump.
report back.
on an 84 model with two pumps, my advice may not be correct since its likely your running an EECIII system. If so let us know that as well.
84 is EEC IV
Did you check the inertia switch and the fuel pump relay? Seems like a slim chance of both pumps taking a at the same time, more likely to be something electrical.
I agree with the inertia switch always check that first..
where would my inertia switch be. i thought they were only on the 5.0 not the v6's. the ground wire your talking about is it the small one that connects to the negative cable on the battery?
Nope they all have one.
Yep, That's the one jcassity is talking about.
It is the ground for the EEC computer. The EEC turns on the fuel pump by providing the ground for the fuel pump relay.
Ground the tan wire at the Self Test connector and turn the key on.(like jcassity suggested).
If the pumps run it means the EEC is not doing it's thing.
If the pumps don't run the problem is betwen the EEC and the pumps. Like the fuel pump relay and the inertia switch. The inertia switch has a reset button to reset it if it is tripped.
Some pictures:
On an 84 I believe the inertia switch is on the passenger side in the trunk, around the hinge somewhere. If you have trim panels in the trunk, there should be a hole in the panel to press down the white button on the switch. I know on 87-88's it's in the trunk, in front on the taillights, right near the latch.
D'oh! Nevermind, just looked at the post right above mine with the pic. Should've read all the posts before replying.
:)
when i replace the negative battery cable i notice that the small black wire had so much corrosion that it crumbled. so i cut the section that was crumbled and put a little thicker piece of wire from the connector to the battery. since i replace the battery cable, the fuel pump haven't worked
If what you did isn't working that will cause your problem.
i fixed the ground that goes to the battery and pushed the switch in the trunk. nothing happened i still cant hear the fuel pumps. but i have notice some thing on the starter relay on the fender keeps on sparking everytime i try to start the car.
?
You can hear the fuel pumps, or you can't hear the fuel pumps? Your first post says you can't and this last post says you can? Since you fixed the ground and pushed the inertia switch, do you have fuel going to the injectors now?
Check your connections and wiring at the starter relay, sparking is not good. I think there are a couple fusible links on the small wires running from the relay, check those too (I think bad links there would cause it not to crank, but check 'em anyway since you have some sparking going on there).
sorry i cant hear the fuel pump still. i unplugged connectors at the fuel pumps and ran two wire from a battery to the pumps and they make noise and come on. but when connected back up to the cars wiring harness nothing. i also changed the fuel pump relay in the trunk to see it that would help but nothing changed. the part of the starter relay that is sparking is the side that runs to the starter itself opposite the side that the positive battery cable connects with all the fusible links.
i figured out what was wrong the oxygen sensor were unplugs which cause the fuel pump not to turn on. after i made two special wire to make my oxygen sensor wires longer so they would be the right length to run down to my long tube headers. that fixed my problem.
That doesn't make any sense.
The oxygen sensors have nothing to do with the fuel pump running.
I had the same problem in my 88 5.0 last year--replaced the relay and it has been working since...
ok,, the last two posts just lost me
That's...well, strange as hell, to tell the truth. Sure you don't have some messed up wiring?
I had a similar issue, turned out to be a missing relay I'd removed while taking the dash out. But this has nothing to do with your case...hope ya get it sorted. :D
now i cant figure it out. i checked every wire and relay and the inertia switch and still the fuel pumps wont turn on. but when i dropped the gas tank and had the tank on the ground and turned the ignition both fuel pump turn on and hum like brand new pumps. then put the tank and pumps back where they go and turn on the ignition again and they worked till i drained the battery from trying to start the car a long time. after i charged the battery up again the pumps dont make any sounds like before i dropped the tank. what could be the problem?
Find the self-test connector under the hood by the left strut tower.
Ground the tan wire labeled fuel pump in the picture.
Turn the key on and let us know if the pumps run.
if your pumps worked with the tank down on the ground, but did not work when you reinstalled the tank,,
your problem is an intermittant open or possibly even shorting. The shorting may cause unwanted sparks:mad:
you need help from someone by doing the following
turn on key (no start)and instantly start doing a wiggle test of the fuel tank harness from under the car.
this may take several tries.
to retest, wait about 5 sec before you turn the key back on.
normal process goes like this when nothing is broke....
you turn on the key
instantly the fuel pump runs for about 2 seconds then shuts off
Key on only , no start
thats pretty complex....
its not as complex compared to the new column transmission linkage setup i made to fit my longtube headers and be able to run my transmission.
did you ever figure this out, i had the same problem this morning when i went to start it. sparks and all...
i havent fixed the problem. im getting power and ground to the gas gauge. but no power to the fuel pumps but the ground to the pumps are fine and connected. so im going to start checking around the ecu and in the engine bay for any bad or loose power wires.