Vacuum leak?Quick question....if your IAC IS gunked up, would a symptom of that be 'surging' when at idle? At times (usually at a stoplight) I have had my '05 stall, and sometimes it'll surge.
Vacuum leak?Quick question....if your IAC IS gunked up, would a symptom of that be 'surging' when at idle? At times (usually at a stoplight) I have had my '05 stall, and sometimes it'll surge.
How did you get all four screws off and back on the housing
Did you put a gasket on the iac housing???for the IAC it was only 2 screws. The throttle body had 4 and I probably should’ve replaced the seal but it seemed fine
No the square with the z in the middle gasket do you need it because I broke minethere's an O-ring on there that looked fine so I didn't replace it
I broke the gasket for this guy. do i need to put one back on?
ok thank you!Yes, but you could just use RTV or similar.
I'm guessing this will likely be the same for the '96 XJ 4.0...? The wife's Cherokee has been sitting a lot lately, and lately has been idling rough on first start-up. And second start-up. And thi...well, you get the idea. It isn't until after it's been fully warmed up and had the engine revved a few times that it settles down to a decent idle. All new tune-up parts (low mileage, anyway). Fairly fresh gas, too. That's why I'm thing perhaps a dirty IAC. Thanks for the great write-up, Chief!If you're experiencing idle issues on your Jeep Wrangler TJ the most likely culprit (and the first thing you should check) is your IAC (Idle Air Controller). Often times the IAC gets very gunked up causing the Jeep to idle improperly. A simple cleaning is usually all it takes to get it running as good as new.
If you end up needing to replace your IAC valve (they do fail on occasion), you can find the part numbers (and the links to purchase them on Amazon) below:
2005-2006 IAC Valve (Part # 4861552AC)
1997-2004 IAC Valve (Part # 4874373AB)
There is no need at all to remove the throttle body to clean the IAC. This is probably one of the easiest and cheapest things you can do.
Below you'll see a diagram of the top of your throttle body with the IAC sensor labeled.
View attachment 14140
Take your IAC off (it's held on by two small torx screws). Clean it with your throttle body cleaner, this is what it will look like before and after.
View attachment 1798
View attachment 1799
Then take off the IAC housing and both sides (house and throttle body). clean that too. before and after...
View attachment 1800
View attachment 1801
View attachment 1802
Put it all back together and you're good to go. Very, very simple. It doesn't get any easier than this!
I'm guessing this will likely be the same for the '96 XJ 4.0...? The wife's Cherokee has been sitting a lot lately, and lately has been idling rough on first start-up. And second start-up. And thi...well, you get the idea. It isn't until after it's been fully warmed up and had the engine revved a few times that it settles down to a decent idle. All new tune-up parts (low mileage, anyway). Fairly fresh gas, too. That's why I'm thing perhaps a dirty IAC. Thanks for the great write-up, Chief!
I can't thank you enough for this. Jeep been dying and rough idling for months, while saving up for a fuel pump, found this gem! Many MANY thanks!If you're experiencing idle issues on your Jeep Wrangler TJ the most likely culprit (and the first thing you should check) is your IAC (Idle Air Controller). Often times the IAC gets very gunked up causing the Jeep to idle improperly. A simple cleaning is usually all it takes to get it running as good as new.
If you end up needing to replace your IAC valve (they do fail on occasion), you can find the part numbers (and the links to purchase them on Amazon) below:
2005-2006 IAC Valve (Part # 4861552AC)
1997-2004 IAC Valve (Part # 4874373AB)
There is no need at all to remove the throttle body to clean the IAC. This is probably one of the easiest and cheapest things you can do.
Below you'll see a diagram of the top of your throttle body with the IAC sensor labeled.
View attachment 14140
Take your IAC off (it's held on by two small torx screws). Clean it with your throttle body cleaner, this is what it will look like before and after.
View attachment 1798
View attachment 1799
Then take off the IAC housing and both sides (house and throttle body). clean that too. before and after...
View attachment 1800
View attachment 1801
View attachment 1802
Put it all back together and you're good to go. Very, very simple. It doesn't get any easier than this!
You’re very welcome!I can't thank you enough for this. Jeep been dying and rough idling for months, while saving up for a fuel pump, found this gem! Many MANY thanks!