2000 XLS hesitation in accleration

[Hank3rd]

Good day! I have a 2000 XLS and have had stalling problms in the past. The truck would stall when idling. I came to find out that it was the idle air controller.

I took the part of and cleaned it well with brake cleaner and the problem seemed to stop. A while later the truck now seems to be hesitating when slightly accelerating. I do not notice it when Pressing firmly on the gas or accelerate heavily. I thought that it may have been the fuel filter, so I replaced it and it still happens. The truck has 80k on it. Also, it is a 6 cylinder.

Could the idle air controller be causing this even though it is not at "idle"? I tried using fuel injector cleaner and installing a new air cleaner. Most shops here want to charge a minimum of $100 to look at it and they cannot guaruntee that it will be fixed.

Any help would be appreciated!
-Hank

 

[Runnin'OnEmpty]

Hank, three things come to mind. One is the IAC, which you already suspect. It's possible that it could be sticking and causing the hesitation. It might also be a dirty MAS (Mass Airflow Sensor). You can do a search and learn how to clean it, but be very careful, new ones are expensive.

The third thing, and the one that I would suspect is the TPS (Throttle Position Sensor). It is a variable resistor that tells the PCM the throttle setting. They are a wear item, and are relatively inexpensive. If you have a multimeter, they are easy to check. Do a search and you will find lots of info on these too.

Welcome to the Explorer Board!

 

[Hank3rd]

Thank you for the quick, informative response! I will check those this weekend and post back!

-Hank

 

[TPLYNCH]

Have you replaced your plugs and wires yet? If not, I would soon.....

 

[Hank3rd]

I replaced the plugs thus far, the wires seemed to be in good shape, but I will replace them soon.

The problem seems to be fuel related, when I step on the gas, it does not seem to desitate. I know that the over the counter injector cleaners are not that great and that my injectors may be dirty, but I would lkie to try to reolve the issue, hopefully, by myself because I would hate to get a wrong diagnostic and be charged for something that did not fix the problem.

-Hank

 

[TPLYNCH]

Your throttle cable may be loose. There is a thread about how to do the throttle cable mod/fix, very recent in this or the under the hood forum