Do I need new fuel filter

[Hidden]

I have a 2001 Grand Cherokee Laredo with 84,000 miles. I recently got a tune up where they apprently just replaced the plugs. SInce driving away from the tune up I have notice that my Jeep "sputters" when I accelerate heavily (i.e. not when I gradually accelerate but really lay on the pedal to get into traffic). I have been told that this sputtering coming right after a tune up may signal a need for a fuel filter. I have no idea. If it is the fuel filter, what is the fuel filter situation on my Jeep? Is it in the tank or in-line, or one of each? I also heard that I may have to replace the entire fuel pump in order to replace the fuel filter - is this right?

Thanks,
David Martin

[tim96]

hi, sounds like the same problem i had with my 96. is the check engine light on? if so what are the codes. my fix was a new set of plug wires and an ignition coil. if your plug wires are pretty old check them first. the mechanic could have ripped or separated the boot from the plug when changing out your plugs. it may be the filter if it has never been replaced. i know the fustration just fixed mine today. good luck

[richpinkham]

There is a filter and its just outside the fuel tank above the rear axle. I have check all the parts stores I could and everyone says the same thing that the only one they sell is in the tank which isnt the right one. I called jeep dealer and they sell the filter for around $70.00 and you could install it your self or pay them to do it. Its the only place that seems to have the correct filter For ALL Grand Cherokees, from 93 up. That what the Dealer said.... Kinda pricey for a filter. and being the only ones that carry it.

[4bz]

From what I've read in the haynes manual. The filters themselves are not to be replaced periodically. No autoparts stores sell them either. So ya, the dealer I think is the only route.

[Griffon327]

Originally Posted by Hidden

I have a 2001 Grand Cherokee Laredo with 84,000 miles. I recently got a tune up where they apprently just replaced the plugs. SInce driving away from the tune up I have notice that my Jeep "sputters" when I accelerate heavily (i.e. not when I gradually accelerate but really lay on the pedal to get into traffic). I have been told that this sputtering coming right after a tune up may signal a need for a fuel filter. I have no idea. If it is the fuel filter, what is the fuel filter situation on my Jeep? Is it in the tank or in-line, or one of each? I also heard that I may have to replace the entire fuel pump in order to replace the fuel filter - is this right?

Thanks,
David Martin

If you absolutely did not have the condition Prior to taking it in for a "Tuneup" then you most probably can have it corrected with Cap and rotor (if equipped) and plugwires. at 84,000 miles the plug wires probably couldn't withstand the abuse of being removed to replace the plugs. This is not exactly the fault of the technician as wires become galded to the plugs after extensive mileage but they should have recomended the wires to be replaced. However if they did recomend you replace the wires and you opted to replace only the plugs then there is a lesson to be learned here.

[bringselpup]

WHAAAA???

Deutsch FF748 at Autozone. $12

[Bob D.]

Originally Posted by Hidden

I have been told that this sputtering coming right after a tune up may signal a need for a fuel filter. I have no idea. If it is the fuel filter, what is the fuel filter situation on my Jeep? Is it in the tank or in-line, or one of each? I also heard that I may have to replace the entire fuel pump in order to replace the fuel filter - is this right?

That's B.S. First off, take it back where you had the tune up done, they may have screwed something up - like using the wrong plugs among other things.

The fuel filter is part of the fuel regulator, see link below.
There is also a fuel strainer that is part of the fuel pump, but neither should be replaced until the fuel pressure is measured at the fuel rail

Originally Posted by bringselpup

WHAAAA???

Deutsch FF748 at Autozone. $12

He is talking about the '99-'04 fuel regulator/filter, a Chrysler only part, $70-$80 bucks.
http://www.geocities.com/jett727747/...atorFilter.jpg

...you most probably can have it corrected with Cap and rotor (if equipped) and plugwires.

The '99s and up do not have rotors or plug wires.

.

[protozee]

The jeep shake or shudder, misfire may occur when the vehicle is operated between 50 - 70 MPH

I tried 2 jeep dealers and they could not fix this, one said it was the coil, replaced it no help, and tune up, injectors cleaned too no help. The other on said it was the torque converter and pump it was under warranty, no help. So I think they just want to sell you something or they don’t know any more then we do, or maybe they throw the service bulletins away. So I did some research on the internet and this is what I found the trouble. So far
I have paid a lot of money at the dealers.

Late closure of an exhaust valve may be the result of no valve rotation and associated build up of carbon on the exhaust valve stem.

So I bought a 16 oz. bottle of Marvel Mystery Oil, put half in the gas tank and the other half in the oil. No more jeep shake or shudder or misfires.

By the way the $500 at the dealer for decarburizing



4.0L MULTIPLE CYLINDER MISFIRE
Date: 08/01/03
Model Year(s): 1999-2004

Description: NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 4.0L ENGINE. This bulletin involves inspection of all engine exhaust valves and a decarbonizing procedure if necessary.

Details: The customer may experience an incident of engine misfire during certain vehicle operating conditions. The misfire may occur when the vehicle is operated between 50 - 70 MPH and under light loading conditions, e.g. slight uphill road grades. This condition may occur at all ambient conditions, but is more noticeable when ambient conditions are less than 0 C (32 F).

If the vehicle is equipped with On-Board Diagnostic (OBD), a MIL illumination may also have occurred due to Diagnostic Trouble Code (DTC) P0300 - Multiple Cylinder Misfire. Various single cylinder misfire DTC?s may also be present. If the frequency of misfire is high the Powertrain Control Module (PCM) may place the engine in ?Limp-In? mode.

The misfire condition may be caused by one or more engine exhaust valves that are slow to close. Late closure of an exhaust valve may be the result of no valve rotation and associated build up of carbon on the exhaust valve stem.

This condition may occur when the engine is not allowed to run at engine RPM?s that are greater than 3,200 RPM. At 3,200 RPM or higher the engine exhaust valves will rotate if not impeded by high carbon deposits. Low engine RPM?s and high carbon deposits are associated with short trip driving where the vehicle engine is not allowed to fully warm to normal engine operating temperatures. Cold ambient temperatures will increase engine warm-up time and add to the opportunity of carbon deposit build-up on the stem of the engine exhaust valve.