hi, thanks to all that respond. I have a 01 caravan with the 3.3. I have have done a tune up about 5 months ago and all was well. Here is my problem, while I am driving and going around 40-45 my van will "jump" and "spit and sputter" a little, then when you apply the gas it goes away. Also from a dead stop I have a little hesitation. You can also see the RPMs move up and down about 300-400rpms. After it warms up it also takes a little longer to start. And sometimes it will idle ruff.Would this be caused by a bad fuel filter or fuel pump? I have 166,000 miles on it and to my knowledge neither have been replaced.

 

Removed - no longer applies!

 

Here is a TSB that may help. The van is surging in lock up, on the freeway then the torque converter maybe the problem with the surging.

SUBJECT:
Engine Sag/Hesitation And/Or Closed Throttle Start Stall
OVERVIEW:
This bulletin involves replacing the Throttle Position Sensor (TPS).
MODELS:
2001 - **2002** (RS) Caravan/Voyager/Town & Country
2001 - **2002** (RG) Chrysler Voyager (International Market)
NOTE: **THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 3.3L OR 3.8L
ENGINE AND BUILT BEFORE OCTOBER 01, 2001 (MDH 1001XX).**
SYMPTOM/CONDITION:
Engine hesitation/sag, closed throttle start/stall, and/or Diagnostic Trouble
Code (DTC) P0123 – “Throttle Position Sensor Voltage High”. May be more
prevalent in cold temperatures below 0 C. (32 F.).
DIAGNOSIS:
If no DTC’s are present or DTC P0123 is present, perform the Repair Procedure.
If other DTC’s are present further diagnosis is required.
PARTS REQUIRED:
Qty. Part No. Description
1 04686360AB Sensor, Throttle Position
REPAIR PROCEDURE:
1. Disconnect the negative battery cable.
2. Remove the electrical connector from the Inlet Air Temperature Sensor.
3. Remove the air cleaner box lid. Remove hose from throttle body.
4. Disconnect the electrical connector at the TPS.
5. Disconnect the electrical connector at the Idle Air Control (IAC).
6. Remove the three (3) TPS mounting bolts and TPS.
7. Reverse the previous steps to install new TPS, p/n 04686360.

 

Thanks...I am going to replace the TPS today and see what happens. I really dont think its the torque convertor because of the hesitation from a dead stop and the ruff idle and the start issue after it is warm. At least i hope its not the convertor. And Another thing I kinda saw is that my MPH isnt as good as it use to be.

 

Well I put in the new TPS and that did not solve my problem. Another thing I seen is that I can put it in drive and put my foot on the brake and slowly give it gas and when it hits around 1200 rpms it starts to run rough and will drop to around 800 rpms and normally just keep doing it. It will do this in park around 1600 rpms. i have been told so many different things it could be including the timing belt....What do you think?????

 

any codes?

was it doing this problem before your tune up?

what plugs did you use,

did you replace the wires

have you tried cleaning the throttle body

 

Stick with your first guess. It appears you make a demand for more fuel and the pump can't keep up at times. Whether a fuel pump is bad or not is easy to determine. An Autozone or the like will lend you a fuel pressure gauge. Connect it to the fuel rail test port. Should see near 55 psi. If you see 55 psi you have at least eliminated one system without spending a dime.

 

Nope no codes...And it did not do this before or after the tune up..It just started doing this about 2 weeks ago. I changed the spark plugs and wires when I did the tune up. I have not cleaned the throttle body. where is the fuel pressure check at?

 

You have to use an inline addapter to check fuel pressure, looks something like this....

 

not sure yr but try to replace the fuel filter?