fantic238

by the lamp.

fantic238

What computer did you use? '88 or '91?

n91chriss

I just pulled the engine, and plugged it into my 88 system harness, it was a junkyard engine I rebuilt.

fantic238

Swap the fuel pump relay with the AC one and check the pins.

n91chriss

I put a new relay in for the fuel pump, no matter what relay is in, the same story, clickety crazy.

NewXJaddict

Take some wire and crimp a blade type connector on each end place one blade in the slot for 30 and the other in the slot for 87 see if the same thing happens.

I just got done going through a whole ordeal with my fuel pump and currently I just have a wire plugged in as described above as a temporary solution to get me back and forth to work while I wait for my new relays to come in the mail.

Why did I order them online? Long story short. NAPA wants 13$ per relay and only had one in stock when I was trying to buy. Found the same :cencored: thing online for 3$ each bought 5 for a total including shipping for 21$ and change.

#999

still couldnt fix the problem...they say they may have to run some new wires to my transmission speed sensor after they do something with the battey (said something about running it directly to the connection?),,,,should re-wiring this be expensive....damn!fix my jeep i got trails to hit!
thanks P

n91chriss

Ok, Thanks for the tip, I had thought about doing something similar, I can do that to rule out relays, but if bypassing it doesn't fix it, is there anything other than the PCM that would shut off the pump if it was bad?

NewXJaddict

The only other thing I can think of that would cause the fuel pump to turn off would be the actual wiring. Go to the back, unplug the wire harness and test for voltage on the vehicle end of the harness. Or a bad wire somewhere along the way that is shorting it out.

fantic238

OOOOKKKK... if the relay is clicking there is definitely something wrong with the signal. The fuel pump relay is powered by the B+ latch relay (ignition switch relay) and ground is provided from the ECU. You can easily check wether it is the positive or the ground by jumpering a positive to the yellow wire (i don't remember wether it is pin 85 or 86 on the relay) or a ground to the orange-tan wire. (the other pin).
Pins 30 and 87 are the power feed to the fuel pump, those are those thick orange and red wires.
Try the ground wire first,(and don't confuse with the thick orange wire,lol) i suspect the ECU isn't doing it's job correctly, maybe the ECU connector is loose or the bulkhead connector on the firewall.

#999

ok so they say its the alternator...but it wasnt..the problem bieng when i punch the gas like floor it they say its getting to0 high a reading from the wires(ohms,volts whatever) causing it to go into limp mode...
so so far it hasnt been the inut sensor itself the connection or the alternator...any other suggestions?

Cj.stuff

Does anyone know if the volume of an air tank is measured the same as if it were filled with water? Meaning, I have a small tank and I want to see how many gallons of air it would hold. If I fill it up with water, would this be a true measurement?

bigdog7766

Hey guys.. where to start.. lets see i noticed that when i got off the highway and pulled into my friends driveway that there was a pretty bad leak thought it was oil and so i checked the oil it was a little low so i put more in(have never leaked before)... next day i was driving on the highway and was getting to about 70 to 75 mph and all the sudden i saw a lot of smoke so i pulled over and there was a trail of some liquid leaking from the bottom and a big puddle under the car... went home checked my oil and transmission fluid and they were both full.. idk what was leeaking and why? any ideas would help thanks

the_big_h

In part-time, if you steer sharp on pavement, it bucks pretty bad.

the_big_h

A five-gallon tank is a five-gallon tank. It holds 5 gallons of water, or 5 gallons of air. But air is compressible - you can push more air into it, the pressure just goes up. The initial 5 gallons of air in it doesn't do you any good, because the only way to get it out is to suck it out (with a vacuum pump), or displace it out (like by putting water into the tank).
Each time you double the absolute pressure, you double the amount of air in the tank. Atmospheric pressure is 14.7 psi (call it 15). At this pressure, your gauge reads 0. If you push another 5 gallons of air into the tank, the gauge will read 15 PSI (absolute pressure is now 30 psi in the tank), and there will be 10 gallons of air in the tank. If you push another 5 gallons in, the gauge will read 30 (and there will be 15 gallons of air in the tank, 10 of which will come out if you open the valve). And so on.