91 4.0. Starts, NO Run

[hbhp5]

   91 4.0, Was in town, stopped at store, came out, started, and seemingly out of NO where would not accelerate. Limped home (8 miles) with several times had to pull off road, NO power.

 

   Fuel pressure test showed 15#, replaced pump, now 41#, but, still no power. Will idle rough, try to accelerate, stumbles and blowback etc.

 

   2 yrs ago similar problem when cold was computer connection, cleaned terminals and used dielectric grease on re-connection, NO go. Timing chain, distributor assy, ALL sensors replaced 2 yrs ago.

 

   ANY Ideas world be appreciated.

 

                                                                                                 JohnA

[HOrnbrod]

Have you checked for fault codes?

 

http://comancheclub.com/topic/28111-reading-obdi-91-and-92-mj-fault-codes/

 

2 yrs ago similar problem when cold was computer connection, cleaned terminals and used dielectric grease on re-connection, NO go. Timing chain, distributor assy, ALL sensors replaced 2 yrs ago.

 

Dielectric grease is a non-conductor and should never be used on electrical connections like connector pins. Take the ECU 60-pin connector apart and clean the male and female connectors with a good electrical contact cleaner and toothbrush. While you're in there also check for bent or recessed pins.

[87MJTIM]

Clogged cat?

[omega_rugal]

MAP sensor? TPS sensor?

[hbhp5]

   Cleaned & Dried Connector, Re-Assembled, Good as NEW~!   Not bad for 350k miles. 

 

Replies MUCH appreciated. John