2002 Ranger 3.0L problem.

[Eam0885]

Hi I have a 2002 Ford Ranger with a 3.0L Vin V, with a auto trans with 109,000 miles on it it, within the last month or so I have started to notice a kinda of jerking feel allmost like a miss while at a constant speed going up hill, it does this both with the cruise on and off mainly at higher speeds on the expressway. I watched the RPM'S during this and it has no effect on them what so ever. I have hooked it up to a computer and it has no codes in the system, If any one has an idea of what this could be I would greatly appreciate any input.

 

[Wicked_Sludge]

start with a basic tuneup. air filter, fuel filter, motorcraft or autolite spark plugs, wires.

 

[Eam0885]

I just replaced the fuel filter about 4,000 miles ago, I put new plugs and wires in about 4-5 months back but I will check those again as well as for the air filter I have a K&N and just cleaned that the other day. Could the distrubtor be causeing this problem.

 

[Wicked_Sludge]

what brand are the plugs?

a K&N you say....check your MAF sensor out. over-oiling your filter will foul the MAFS out with oil. theres details on how to clean the MAFS in the tech library.

you dont have a distributor.

 

[Eam0885]

The plugs are Motorcraft plugs I will also try cleaning the MAF sensor as for the distributor I thought I had a coil pack but the book says that it's a distributor Im not sure though.

 

[Wicked_Sludge]

the last year for the distributor in the 3.0 was 1994. everything 95+ is DIS.

 

[Eam0885]

Ah thanks for the clarification on that I just saw what the book said. thanks for the information I will try and cleaning the MAF sensor tomorrow and look at the plugs as well and hopefully it takes care of the problem.

 

[bumbleb77]

I had a slight miss at idle. Lazy O2 sensor Bank 1 (passenger side) It won't throw a code, and have you seen a drop in gas mileage as well? I replaced mine and gained 3 mpgs

 

[Eam0885]

Yes, I have seen a great decrease in gas mileage it has dropped to 12.5 MPG on my last tank of gas and several tanks before were also decreasing down to that as well.

 

[TomB1269]

If you are getting any belt squeal sounds it could be syncro as well. I had the syncro cause light mis-fire at varring rpms depending on engine temp an load. The syncro is not checked for codes over 2500rpms. I replaced mine at 79K.

 

[odie1969]

Sorry not meaning to high jack the thread. but i'm having sim. problems if I hold it at 3k going down the highway it seems to miss. but I have yet to throw a code. also no chirping noise so I was wandering if it could be just the sensor going bad. Also if I am going up a hill climb and hold it at 5k I have no problems. plugs, wires and air filter 6 months ago going to change the fuel filter today and see if that helps. thanks

 

[Beef52751]

i got a similar problem aswell, im gonna try O2 sensors
Beef

 

[rurouni20xx]

mine would go great then when it warmed up or i was on the interstate the engine would buck and the chk engine light would come on, i hammered the gas and let off it went away. my chk engine light stayed on after warming up for over 135k miles and i never thought too much about it. i always thought it was o2 sensor related, just never had the money to change the sensors at the time...if i only knew then what i know now, lol.

 

[odie1969]

Just a update on my problem to try to help sombody else. when my would surge at 3k rpms only and not at any other rpm, well it turned out to be a bad fuel filter. hope this helps someone else.

 

[rurouni20xx]

water in the fuel will def do it (condensation in the lines and tank piling up in the fuel filter). ive changed my filter several times once or twice i had water but the same problem kept popping up, moreso/worse as the miles went on. she died b4 i had the time to address the issue.