Map sensor vaccume line

Reply Subscribe

Thread Tools

Search this Thread

May 25, 2012 | 12:49 AM

onmyonly

Thread Starter

Junior Member

Joined: May 2009

Posts: 40

Likes: 0

From: california

Year: 1987

Model: Cherokee

Engine: 4.0

Map sensor vaccume line

Anyone else have this happen?
When cranking usually cold start the map vac like grommet pops out of the throttle body..
Keep starts runs like crap. Put it back it she's perfect.

Thinking its slack in the timing chain???

Thinking super glue..

May 25, 2012 | 07:34 AM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,579

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Don't super glue your timing chain just yet.

A little dab of any automotive adhesive around the outside of the grommet, being careful not to get anything inside the line, should work well.

May 25, 2012 | 07:37 AM

jakbob

CF Veteran

Joined: Dec 2011

Posts: 4,006

Likes: 1

From: Pasadena, MD

Year: 1987

Model: Wagoneer

Engine: Renix 4.0

I had the same problem. It went away after i replaced my spark plugs. Im thinking new plugs, no back fire, plug stayed in.

May 25, 2012 | 07:42 AM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,579

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by jakbob

I had the same problem. It went away after i replaced my spark plugs. Im thinking new plugs, no back fire, plug stayed in.

Good point. Back to basics. Cap, rotor, plugs and wires evey 30,000 miles. Only cap and rotor with brass terminals and Champion Coppers or NGK plugs. Belden wires from Napa are way better than the Vatozone crap.