Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Shaunfella on July 29, 2015, 06:58:56 AM

Title: Yet another TJ fault
Post by: Shaunfella on July 29, 2015, 06:58:56 AM: Again, some issue with my TJ folks
Title: Re: Yet another TJ fault
Post by: gazjeep on July 29, 2015, 07:20:42 AM: Such as ?
Title: Re: Yet another TJ fault
Post by: Shaunfella on July 29, 2015, 07:55:45 AM: Quote from: gazjeep on July 29, 2015, 07:20:42 AM
Such as ?
Not sure what happened there...I did enter the problem...

"Again, some issue with my TJ folks

It's an auto...recently when sitting in traffic and I lift my foot off the brake (and in drive) the car rolls (as it should) however the engine almost cuts out but manages to recover itself and keep running.

Any ideas what could cause this? I read online it could be an IAC valve (abbreviation may be wrong).

I know you guys love a good fault thread.......

Thanks"
Title: Re: Yet another TJ fault
Post by: Jonny Jeep on July 29, 2015, 08:50:10 AM: It could well be the IAC (Abbrev. correct - Idle Air Controller). The air passage could be a bit gummed up by deposits, and the IAC sticking a bit. You need to remove the IAC to clean it and the orifices in the throttle body properly. Careful cleaning the IAC itself, I read they can be broken if the plunger is moved.
Title: Re: Yet another TJ fault
Post by: Shaunfella on July 29, 2015, 09:26:41 AM: Quote from: Jonny Jeep on July 29, 2015, 08:50:10 AM
It could well be the IAC (Abbrev. correct - Idle Air Controller). The air passage could be a bit gummed up by deposits, and the IAC sticking a bit. You need to remove the IAC to clean it and the orifices in the throttle body properly. Careful cleaning the IAC itself, I read they can be broken if the plunger is moved.
Thanks for your response
Title: Re: Yet another TJ fault
Post by: Shaunfella on July 29, 2015, 10:49:34 AM: Quote from: Jonny Jeep on July 29, 2015, 08:50:10 AM
It could well be the IAC (Abbrev. correct - Idle Air Controller). The air passage could be a bit gummed up by deposits, and the IAC sticking a bit. You need to remove the IAC to clean it and the orifices in the throttle body properly. Careful cleaning the IAC itself, I read they can be broken if the plunger is moved.
Just checked the air filter and it's black!!! ....could this also be a cause??
Title: Re: Yet another TJ fault
Post by: Brachunky on July 29, 2015, 09:42:53 PM: I have come across cars with filters so blocked, they would not start!! Get it changed first
Title: Re: Yet another TJ fault
Post by: Dave69 on July 30, 2015, 06:21:10 AM: Quote from: Shaunfella on July 29, 2015, 10:49:34 AM
Quote from: Jonny Jeep on July 29, 2015, 08:50:10 AM
It could well be the IAC (Abbrev. correct - Idle Air Controller). The air passage could be a bit gummed up by deposits, and the IAC sticking a bit. You need to remove the IAC to clean it and the orifices in the throttle body properly. Careful cleaning the IAC itself, I read they can be broken if the plunger is moved.
Just checked the air filter and it's black!!! ....could this also be a cause??

this is an initial observation of a problem, a black or contaminated filter will provide a resistance to airflow at low speeds. Replace first then see if the problem is still there
Title: Re: Yet another TJ fault
Post by: bgbazz on July 30, 2015, 06:41:54 AM: :iagree:....it's the logical place to start.