1999 jeep Cherokee starts doesn't run
11-27-2021, 09:29 PM
#16
Newbie
Thread Starter
If thats still the case, check your vacuum lines, including any rubber connections between them. Look around the injectors for any signs of leakage. One or more could be sticking and dumping fuel. Check the plugs. Too much gas will foul the plugs and idle rough. I would take a look at the throttle body as well. It, and possibly the IAC, need a good cleaning.
Sitting for a couple years couldve taken its toll on the gas. After 3 years, probably not. You never know, tho. Could even be water in the tank.
Hopefully the code reader gives you something to go on.
Sitting for a couple years couldve taken its toll on the gas. After 3 years, probably not. You never know, tho. Could even be water in the tank.
Hopefully the code reader gives you something to go on.
11-30-2021, 05:43 PM
#17
Newbie
Thread Starter
sooo, i seem to have 0 fuel pressure when trying to start it or just turning it on but, she is still trying to start... i dont understand that at all. Read my codes and i have a vap code which has been there and a fuel too lean bank 1 code which apparently can be from a fuel pump.... so it's sounding like its time to drop the tank.
@evil_goat @agreen
@fb97xj1 do you happen to know where all the vac lines are? is there a post somewhere i can look through?
does anyone know the most common areas for Vapor issues? if i have to ill just replace everything rubber, the metal line looks good the whole way down? aka the vap code... wanna fix this to get it inspected.
@evil_goat @agreen
@fb97xj1 do you happen to know where all the vac lines are? is there a post somewhere i can look through?
does anyone know the most common areas for Vapor issues? if i have to ill just replace everything rubber, the metal line looks good the whole way down? aka the vap code... wanna fix this to get it inspected.
Last edited by rustynail17; 11-30-2021 at 05:50 PM.
11-30-2021, 05:52 PM
#18
Seasoned Member
Check the wiring to the fuel pump and try to see if there is voltage before dropping it. Also, can you hear the fuel pump when you turn the key to the on position? Maybe someone already said this, but did you check the ballast resistor? It is basically a resistor that the fuel pump current goes through after the car has started since the fuel pump needs more power when you start the car.
11-30-2021, 06:21 PM
#19
Newbie
Thread Starter
Check the wiring to the fuel pump and try to see if there is voltage before dropping it. Also, can you hear the fuel pump when you turn the key to the on position? Maybe someone already said this, but did you check the ballast resistor? It is basically a resistor that the fuel pump current goes through after the car has started since the fuel pump needs more power when you start the car.
yes sir, i can hear the fuel pump kick on for about 3ish seconds, rewwwwwww noise where is said ballast resistor? and how to check it?
11-30-2021, 06:26 PM
#20
Seasoned Member
The ballast resistor is under the hood, on the right edge. This video will show you where it is, what it looks like, and how to fix it https://bleepinjeep.com/video/fuel-pump-ballast-resistor.
If the ballast resistor is not connected properly or bad, the car will start, then die right after. You can connect the two wires that are connected to the resistor directly to test if it is bad.
If the ballast resistor is not connected properly or bad, the car will start, then die right after. You can connect the two wires that are connected to the resistor directly to test if it is bad.
11-30-2021, 06:28 PM
#21
Newbie
Thread Starter
The ballast resistor is under the hood, on the right edge. This video will show you where it is, what it looks like, and how to fix it https://bleepinjeep.com/video/fuel-pump-ballast-resistor.
If the ballast resistor is not connected properly or bad, the car will start, then die right after. You can connect the two wires that are connected to the resistor directly to test if it is bad.
If the ballast resistor is not connected properly or bad, the car will start, then die right after. You can connect the two wires that are connected to the resistor directly to test if it is bad.
she needs a tuneup forsure... man so many things could be the issue but if i can find out just why she wont run ill start replacing stuff just to replace it, starting with every damn sensor and cleaning the air thingy...where the air filter goes to after pushing air through it. can't think of the name right now lol.
apparently the ballast resistor just effects it running, it wont start now?
i feel like everything is still point to the damn pump
Last edited by rustynail17; 11-30-2021 at 06:36 PM.
11-30-2021, 06:35 PM
#22
Seasoned Member
It probably wont cause rough running... unless it is resisting too much, and there is not enough electricity to the pump. However, it is still a good idea to check it in case there are multiple things wrong.
11-30-2021, 06:40 PM
#23
Newbie
Thread Starter
i need to find me a guru next to me hahaha man i love this thing... after driving her that day after 3 years... im dieing to get her running again
11-30-2021, 06:44 PM
#24
Seasoned Member
Just found out that jeep stopped using them in '93, so you don't even have a ballast resistor.
11-30-2021, 06:46 PM
#25
Seasoned Member
I would think it would be old fuel clogging the lines, but if you got to the gas station, then maybe not. I guess it is time to drop the tank and check and/or replace the fuel pump.
11-30-2021, 06:53 PM
#26
Newbie
Thread Starter
ya i just went and looked and didnt see one haha i need to clean this thing bad... shes covered in oil... from that stupid valve cover leak.. need to remove and clean the ground thats next to the dipstick and just wipe her down for hours...if i didnt have a stupid hoa... id take the whole engine apart... might need to talk to a buddy about keeping her at his house for a bit while i fix her up.
Last edited by rustynail17; 11-30-2021 at 06:58 PM.
12-01-2021, 06:10 AM
#27
Senior Member
Try adding another 5 gal can of gas to the tank.
If it still won't start, pull the fuel pump relay and install a jumper where pins 87 and 30 go. I'm not at mine right now, but I think that's how they labeled the FP relay pins. That will cause the fuel pump to run continuously, so you can try starting it that way. If the fuel pump runs and you have pressure, you can eliminate the fuel pump, wiring, and power going to the relay. If it doesn't run, it might be a bad ground, bad wiring, or a bad pump. I like doing this test because it's an effective way of eliminating half the possibilities without ever crawling underneath.
If it still won't start, pull the fuel pump relay and install a jumper where pins 87 and 30 go. I'm not at mine right now, but I think that's how they labeled the FP relay pins. That will cause the fuel pump to run continuously, so you can try starting it that way. If the fuel pump runs and you have pressure, you can eliminate the fuel pump, wiring, and power going to the relay. If it doesn't run, it might be a bad ground, bad wiring, or a bad pump. I like doing this test because it's an effective way of eliminating half the possibilities without ever crawling underneath.
12-01-2021, 11:42 PM
#28
Newbie
Thread Starter
Try adding another 5 gal can of gas to the tank.
If it still won't start, pull the fuel pump relay and install a jumper where pins 87 and 30 go. I'm not at mine right now, but I think that's how they labeled the FP relay pins. That will cause the fuel pump to run continuously, so you can try starting it that way. If the fuel pump runs and you have pressure, you can eliminate the fuel pump, wiring, and power going to the relay. If it doesn't run, it might be a bad ground, bad wiring, or a bad pump. I like doing this test because it's an effective way of eliminating half the possibilities without ever crawling underneath.
If it still won't start, pull the fuel pump relay and install a jumper where pins 87 and 30 go. I'm not at mine right now, but I think that's how they labeled the FP relay pins. That will cause the fuel pump to run continuously, so you can try starting it that way. If the fuel pump runs and you have pressure, you can eliminate the fuel pump, wiring, and power going to the relay. If it doesn't run, it might be a bad ground, bad wiring, or a bad pump. I like doing this test because it's an effective way of eliminating half the possibilities without ever crawling underneath.
So from 87 to 30? Ima have to research this as im not fully understanding. I can definitely hear the pump kicking on but I pushed in the release gas valve on the long tube/block looking thing next to the engine and no fuel came out. I might try this though. I'm starting to think fuel pump might be clogged from the old gas.
12-02-2021, 03:41 AM
#29
CF Veteran
i can hear the fuel pump kick on for about 3ish seconds
What exactly is the error code? Could be a loose gas cap or the rubber connector in the emission control line near the gas tank. Or the metal line that goes forward.
12-02-2021, 03:47 AM
#30
CF Veteran
