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Mar 5, 2015 | 04:56 PM

#16

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,579

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Here's my suggestion.

Contact Programbo here on Cherokee Forum and get a set of refurbished "746 Volvo Injectors".

Mar 5, 2015 | 06:01 PM

#17

DFlintstone

CF Veteran

Joined: Aug 2011

Posts: 10,489

Likes: 24

From: Nor-Cal Coast

Year: 90,84

Model: Cherokee

Engine: 4.0,2.5

Quote:

Originally Posted by cruiser54

There's a test to determine if the fuel pump check valve is letting the system de-pressurize or if the injectors are causing it.

Quote:

Originally Posted by cruiser54

get a set of refurbished "746 Volvo Injectors".

A solid X2 there. If one was already changed you could be really close to more trouble involving a fire. Here is a thread including 746 "testimonials" >>https://www.cherokeeforum.com/f2/199...r-swap-163105/

Mar 5, 2015 | 08:33 PM

#18

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 DFlintstone

I need to do that myself. I gather you bring it to pressure with the gauge hooked up, then clamp off the flex line to the rear of the rail, turn it off. If it then holds, it was only the check valve in the pump. Does that sound right?

A solid X2 there. If one was already changed you could be really close to more trouble involving a fire. Here is a thread including 746 "testimonials" >>https://www.cherokeeforum.com/f2/199...r-swap-163105/

I would have to dig up the fuel pressure diagnostics. Pretty close.