XJ almost stalled out twice while pullingmy camper???

[dagod16]

It had the popup hooked up and it was attached and in park and once in drive. In both cases it was just sitting. And it was a hair away from stall out and i gave it some gas to avoid stalling. Any thoughts. Without camper no issues.
Any thought? 210K

[4.3LXJ]

Idle air controller probably needs cleaning. Easy fix and almost free. It is located on the throttle body

[dagod16]

I cleaned the throttle body. Do u have a pic of idle air controller. Why only when camper is hooked up.

[4.3LXJ]

I don't have a pic handy. There are two plugs that go to that area. One is the throttle position sensor on the throttle body. The other is on or right next to the throttle body. Easy to get to and to see. This probably happens because the transmission is under a heavier load when towing and is just marginally different than what the ECM is used to and the IAC is a little sticky

[dagod16]

I bet you tube has a video i can find.

[slvmart]

Was the idle lower than normal, with the trailer plugged in, or was it a rougher idle ? It does seem a bit strange that just hooking a trailer up to the vehicle would make the idle change to the point of the engine stalling. I could see the stalling happening when being driven, but where would a greater load come in just because of a connector.

Anyway, this is definitely interesting. Let us know if cleaning the IAC will make a difference. Just curious .....

Here's a pic from the Repair Manual..


5653

[dagod16]

What do i clean it with.?

[abebehrmann]

You want to clean it with throttle body cleaner that is labeled "sensor safe"

[dagod16]

Ok I just bought the throttle body cleaner and I am about to begin the procedure. I will take a pic and post it and report back with the results.


By the way, we drove the 2 miles back home from the camp ground and it was almost stalling out at the stop signs. I would call it more of a very rough idle than a stall out. But actually pushing the gas is fine. Just at a complete stop it will do this.

[dagod16]

Ok, so I am going to post the pic, but I also wanted to say this.

I remember about two weeks ago buying a full tank of vpower. I wonder if the vpower removed carbon and redeposited it on the IAC. Because I cleaned the IAC about 20K ago, and I had my last tank of vpower about 30K ago. So I wonder if I caused this myself.

[dagod16]

So it's all back together and it works much better.

I guess the vpower moved the carbon deposits in the engine down the road to the IAC, never thought that would happen.

I like to run the vpower once in a while but maybe I should stop that.

Also the bottom screw on the IAC was loose, I could move it around with my fingers loose. So maybe it was shaken loose over time. So this time I cleaned it up good, made sure the seal was on , and tightened it up better.

Works now.


I love this site. Thanks everyone.

I was worried it might have been the fuel pump or something like that.

[XJ Wheeler]

The fuel shouldn't make a difference. The iac, being on the throttle body is before any fuel even meets the incoming air. So you're good to keep using it if you want.

Sent via messenger pigeon - i talk, he types.

[dagod16]

I feel stupid. Your right the fuel is after the iac.

So why is it getting so dirty. Do i need a better filter?

[XJ Wheeler]

I feel stupid. Your right the fuel is after the iac.

So why is it getting so dirty. Do i need a better filter?

Its natural for it to get that way after a while, like the throttle body. Just clean it at a certain interval and it will be fine.

[Carves]

X 2 with XJ Wheeler

[4.3LXJ]

Actually I would want to look at the air cleaner and see what is up there.

[dagod16]

When you mean air cleaner you mean filter, right?

[4.3LXJ]

The whole thing. The question is: are you sucking in too much dirt to make that IAC get dirty so quickly

[oderdene]

or, oil vapor from crancase through air hose

[Carves]

... altho maybe ?? .... the better fuel ( s'posed to have better cleaning agents ?? ) is loosening some of the gunk between tank and throttle body causing the IAC to gum up a bit sooner ??


sheesh ... I must have had more rums than I thought - when I wrote that .. :o

:D:D


X 2 with oderdene and 4.3LXJ about checking the airbox.

Oil from the crankcase vent pipes, is a likely.
A weepy fanclutch gums up the air filter/intake, pretty quick on a RHD ... dunno about the LHD versions.

[dagod16]

Is that air hose connected to the pvc ?

[4.3LXJ]

PVC? Not sure what you mean

[oderdene]

Is that air hose connected to the pvc ?


PVC? Not sure what you mean


PCV? Positive crankcase ventilation?

[dagod16]

The hose that goes from the air filter box over to the valve cover, it connects up to some thingy. ?

Rob

[4.3LXJ]

Yes, that is your crank case ventilation, one of them. The other hooks to the rear of the valve cover. Both of them need to be clean. Bear in mind that the rubber gets brittle and removing them for cleaning is hard to do without breaking them. They are available at NAPA if you break one

[dagod16]

PCV yes oops.

How often should they be cleaned? I have never cleaned them. I would just replace it because I would break it for sure.

[4.3LXJ]

As long as they are not plugged, they are fine. Those are really more vents than anything else. They either work or they don't. When the rear one gets plugged, it will cause the front to spew oil into the air box