After it started it ran kinda rough. the idle was up and down. not like before it ran at a steady idle. its got lotta fuel pressure but not sure if it cuts out after starting. it will start but stall right after that. it will run when pouring gas straight into carb but stall without gas?
Your fuel pump is on its way out it's giving you signs what you see is what normally happens when fuel pumps go out best of luck to you
SOURCE: Jeep won;t start..new fuel pump installed
try the fuel filter and make sure you have proper oil pressure!! Remeber if you have tried craking to many bad times then the plugs are going to be fouled out!! Means that they are going to be drowned with gas and need replacing!! Also make sure your fuel pump is coming on!! You should hear a hissin or a hummin noise back from the fuel tank!
SOURCE: 1998 Jeep Grand Cherokee has a rough idle at first
You do have a filter and it's mounted right on top of the pump on outside of tank...it is also the pressure regulator. You really should put a pressure gauge on the fuel system and check it out though. you may find there is a problem elsewhere. Good and proper testing is the only way to get answers about problems especially now that systems are all electronically controlled.
SOURCE: Where is the fuel filter located
Here is a picture of the fuel filter location. If replacing filter does not fix the problem, check fuel pump pressure.
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SOURCE: I was driving and i
Hi ST.
Problems that occurr and disappear erratically are often caused by bad wiring.
In your case, if problem is stalling when idling and during startup, parts that are likely involved are those determining the balance of fuel/air mixture.
This kind of symptoms are commonly caused by weak wiring to MAP/MAF sensor (MAP on the 97 engine). This often results in error code stored.
If problem is only at cold, check IAT (idle air temp) sensor, also located in the air intake, check the idle air control valve.
Check crank sensor wiring harness. This is also common cause for the problem.
Check wiring to injectors and high voltage wires from distribution to spark plug. If any of these is the problem, then you will get a misfire code stored in ECM (main computer module).
If the car also drives very rough and is revving up and down in a weird way, check the EGR valve.
The fuel pump wiring may also be responsible. In that case you will get a lean mixture code if you do an error scan.
The two connectors to ECU must be tested, just in case. If instrument panel comes on and if there is no additional problem, this are hardly related to the problem.
If wiring is OK, check the vacuum system and try cranking with gas tank cap off. Vacuum system is tested using an hand tool gauge onvacuum lines while spraying card cleaner on the hoses (or heating them with a torch). If there is a leak, pressure will go up. A big leak will also do hissing noise, and will often result in a lean code when doing an OBD code scanning.
As first thing I would do a code scanning. This car is OBDII. The scan can be done for free at the nearest Autozone, or for a small fee at any garage.
If you get any OBDII code from the scan, report it here, so that we can isolate further the possible reason for the problem.
Regards.
Ginko.
SOURCE: 1996 jeep grand cherokee stalls when i put it in
Try looking at your air filter. You could have a vacuum leak, like you already said. Also, check your coolant sensor and intake air temp sensor, if equipped.
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