help
#16
Newbie
Thread Starter
Join Date: Feb 2015
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
no acceleration
New manifold gasket took care of high idle problem .....cleaned the iac & tb has new cts tps o2 sensor plugs wires cap rotar fuel&air filter have checked grounds and relays fuel pressure an pump when i try to accelerate it wont take the gas driving or sitting &idle will take gas pedal just as long as i gradually do it but i cant stomp it could it b the computer
#17
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Doubtful it's the ECU. What were your fuel pressure readings?
Ever replace the injectors?
Ever replace the injectors?
#19
Senior Member
Join Date: Nov 2014
Location: Hacienda Heights
Posts: 603
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1990
Model: Cherokee
Engine: 4.0
K I cleaned the iac an tb I've put new plugs an wire's new cap an rotar air filter cts an o2 sensor map sensor an no change still high idle jumps and spits win try to hit the gas pedal.. had a friend link up to it but it was only showing that it's staying in open loop...any suggestions.
#20
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
#21
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
#22
Newbie
Thread Starter
Join Date: Feb 2015
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
[QUOTE=cruiser54;3070136]It needs to be a solid 31 at idle and 39 when you unplug the hose from the fuel pressure regulator.[/QUO
Checked the compression and all 90psi except cyl 3 got 60 and cyl 6 got 70 put new time chain on and made no difference still pop stumble win accel hard havent checked psi
again yet wat would cause bad compression
Checked the compression and all 90psi except cyl 3 got 60 and cyl 6 got 70 put new time chain on and made no difference still pop stumble win accel hard havent checked psi
again yet wat would cause bad compression
#24
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,971
Received 1,559 Likes
on
1,263 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
[QUOTE=kwhite90cherokee;3073830]
Rings or valves.
Only a leakdown test will differentiate.
It needs to be a solid 31 at idle and 39 when you unplug the hose from the fuel pressure regulator.[/QUO
Checked the compression and all 90psi except cyl 3 got 60 and cyl 6 got 70 put new time chain on and made no difference still pop stumble win accel hard havent checked psi
again yet wat would cause bad compression
Checked the compression and all 90psi except cyl 3 got 60 and cyl 6 got 70 put new time chain on and made no difference still pop stumble win accel hard havent checked psi
again yet wat would cause bad compression
Only a leakdown test will differentiate.