Rough Idle Issue! Please, Help!

Reply Subscribe

Thread Tools

Search this Thread

Dec 28, 2017 | 10:53 PM

Seungyeon Che

Thread Starter

Newbie

Joined: Dec 2017

Posts: 4

Likes: 0

Model: Cherokee(SJ)

Rough Idle Issue! Please, Help!

My cherokee is 1999 2.5L Manual

Hi, I am from South Korea. Can't ask no one in here. Please Help me out!

the symptom is..

My Cherokee starts up just fine but after like 2 minutes as the RPM goes down to settle at proper RPM
it gets ROUGH... then If I press down accelerate pedal for 2 seconds it gets fine.
If I just drive right after start up then after like 50m driving, the car sputters. So I have to press down clutch pedal and press down the accelerate pedal.
this symptoms happens every time only after start up. (either cold start or hot start)
doesn't happen while driving.

I feel like some fuel line is stuck and it gets clean If press down the accelerate pedal..

please Help!

Dec 29, 2017 | 04:57 AM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Make sure your intake manifold fasteners haven't loosened up.

Clean your throttle body and Idle Air Controller.

http://cruiser54.com/?p=60

Dec 29, 2017 | 08:17 AM

Seungyeon Che

Thread Starter

Newbie

Joined: Dec 2017

Posts: 4

Likes: 0

Model: Cherokee(SJ)

Cleaned throttle boday and IAC..

But haven’t checked intake manifold fasteners. I will soon!

Dec 29, 2017 | 09:57 PM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by Seungyeon Che

Cleaned throttle boday and IAC..

But haven’t checked intake manifold fasteners. I will soon!

the ground wire from the cylinder head bolt to firewall is very important. Remove from firewall, scrape til shiny. Reinstall bolt.

Dec 30, 2017 | 12:16 AM

Seungyeon Che

Thread Starter

Newbie

Joined: Dec 2017

Posts: 4

Likes: 0

Model: Cherokee(SJ)

Quote:

Originally Posted by cruiser54

the ground wire from the cylinder head bolt to firewall is very important. Remove from firewall, scrape til shiny. Reinstall bolt.

Actual connectors to both + and - to the battery is corroded pretty badThis can be problem?

Dec 30, 2017 | 07:32 AM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by Seungyeon Che

Actual connectors to both + and - to the battery is corroded pretty badThis can be problem?

Do it all. It's maintenance. Don't disregard the ground strap advice.....

Dec 30, 2017 | 06:54 PM

Seungyeon Che

Thread Starter

Newbie

Joined: Dec 2017

Posts: 4

Likes: 0

Model: Cherokee(SJ)

Quote:

Originally Posted by cruiser54

Do it all. It's maintenance. Don't disregard the ground strap advice.....

Just Did it all. But the symptom still remains.Should I take off the whole ground wire and clean it? I only cleaned the surface which connects to the firewall.Wire itself is pretty green as corroded.This would be shown on scanner? Should I just go to a mechanic?

Rough Idle Issue! Please, Help!

Rough Idle Issue! Please, Help!

Trending Topics