Okay, I have had this problem for a year now.
It originally started when I had a code scanner in the TEST Mode and disconnected the two (2) ten (10) pin salt & pepper shaker connections to clean them. I know, big mistake. Anyway, I cleaned the connectors and plugged them back together. I noticed that then, my fuel pump started running and I could not shut it off. Everything was fine before this! I then disconnected the battery ... then reconnected and it again started running. I then replaced the fuel pump relay and it went back to normal operation. However, upon scanning it later after driving, I noticed a Code 96 kept coming up in the "Continous Memory" second set of codes during all KOEO tests. This has occured for a year now.
Anyway, the problem comes in in getting rid of this code. So far, I have changed the Fuel Pump relay, the EEC Relay, check my grounds (all less than 1 ohm) at 60 pin connector. Checked the Fuel Pump Monitor wire where it ties in to the main fuel pump wire behind drivers seat .... good soldered factory connection and it ohmed out fine and always has 12 volts. I drove around with a test light hooked up to this wire and the test light is always lit. The problem appears to be in the code definitions! this causes a wild goose chase which is trying my patience and wearing me out!!! Some code definitions say a Code 96 is "battery power "open" to PCM. And other information says its the fuel pump secondary circuit! And from my research, the "fuel pump secondary circuit is the battery wire to the fuel pump relay that then goes to the fuel pump when the relay is energized. So, which one is the right code??? I have also checked the primary fuel circuit which includes the PCM to inertia switch, to relay, back to the computer ground. But, between the three of these circuits, it is very time-consuming since I am all over the car!!! Which circuit is it REALLY in??? And, like I said above, it is an intermittent condition. The car is being driven daily and nothing is noticed while driving as far as the fuel system shutting off or anything like that. Some would say forget about it, but I cannot do that ... I need to find it and fix the problem since it probably affects other things. Purrs on the highway engine couldn't be smoother ... but at idle, it is somewhat rough. The vacuum is a bit low at 15 in Hg. but that is probably a separate problem that I haven't been able to figure out. Though I am very good at these systems, this car is giving me a run for my money and time!!! Anyway, if one of these circuits is open like the code says, then how come it runs great out on the road. Seems to me, if this is the case, it is getting power from an alternate route or it would be missing or cutting out! Anyway, if anyone knows how it could be getting power some other way I'd like some good input. I have painstakenly checked these circuits over and over for a year now. Just went through it again tonight. Drove the car for 12 miles and no Code 96 has showed up sop far. But, in a day, it will show up if not before I get back home. It is very intermittent meanly it is only happening over a long interval of engine running, but on a regular basis .... just about every day of driving, it will reset itself with the "Continous Memory" which causes me to again scratch my head ... please help me to solve this plagueing intermittent problem so I can move on to bigger and better things! BTW, I already have all of the schematics etc. and have traced everything .... just am not finding anything since it is so very sporatic ... but regular over the driving cycle.
Also, the fuel pump is about 2 years old. I do not want to drop the tank and spend two days just to find everything okay on such an intermittent condition ... cuz it probably would not be there at that moment. And the computer seems alright since everything else works and is acting the way it should. Something is setting this Code 96 Fuel Monitor Code ... does anyone know what else could be doing this or give advice on what else to check. I think I checked everything but certainly something could be hidden in a harness (not going to rip them apart w/o a problem indicator).
Any help or good technical suggestions would be appreciated!!!
It originally started when I had a code scanner in the TEST Mode and disconnected the two (2) ten (10) pin salt & pepper shaker connections to clean them. I know, big mistake. Anyway, I cleaned the connectors and plugged them back together. I noticed that then, my fuel pump started running and I could not shut it off. Everything was fine before this! I then disconnected the battery ... then reconnected and it again started running. I then replaced the fuel pump relay and it went back to normal operation. However, upon scanning it later after driving, I noticed a Code 96 kept coming up in the "Continous Memory" second set of codes during all KOEO tests. This has occured for a year now.
Anyway, the problem comes in in getting rid of this code. So far, I have changed the Fuel Pump relay, the EEC Relay, check my grounds (all less than 1 ohm) at 60 pin connector. Checked the Fuel Pump Monitor wire where it ties in to the main fuel pump wire behind drivers seat .... good soldered factory connection and it ohmed out fine and always has 12 volts. I drove around with a test light hooked up to this wire and the test light is always lit. The problem appears to be in the code definitions! this causes a wild goose chase which is trying my patience and wearing me out!!! Some code definitions say a Code 96 is "battery power "open" to PCM. And other information says its the fuel pump secondary circuit! And from my research, the "fuel pump secondary circuit is the battery wire to the fuel pump relay that then goes to the fuel pump when the relay is energized. So, which one is the right code??? I have also checked the primary fuel circuit which includes the PCM to inertia switch, to relay, back to the computer ground. But, between the three of these circuits, it is very time-consuming since I am all over the car!!! Which circuit is it REALLY in??? And, like I said above, it is an intermittent condition. The car is being driven daily and nothing is noticed while driving as far as the fuel system shutting off or anything like that. Some would say forget about it, but I cannot do that ... I need to find it and fix the problem since it probably affects other things. Purrs on the highway engine couldn't be smoother ... but at idle, it is somewhat rough. The vacuum is a bit low at 15 in Hg. but that is probably a separate problem that I haven't been able to figure out. Though I am very good at these systems, this car is giving me a run for my money and time!!! Anyway, if one of these circuits is open like the code says, then how come it runs great out on the road. Seems to me, if this is the case, it is getting power from an alternate route or it would be missing or cutting out! Anyway, if anyone knows how it could be getting power some other way I'd like some good input. I have painstakenly checked these circuits over and over for a year now. Just went through it again tonight. Drove the car for 12 miles and no Code 96 has showed up sop far. But, in a day, it will show up if not before I get back home. It is very intermittent meanly it is only happening over a long interval of engine running, but on a regular basis .... just about every day of driving, it will reset itself with the "Continous Memory" which causes me to again scratch my head ... please help me to solve this plagueing intermittent problem so I can move on to bigger and better things! BTW, I already have all of the schematics etc. and have traced everything .... just am not finding anything since it is so very sporatic ... but regular over the driving cycle.
Also, the fuel pump is about 2 years old. I do not want to drop the tank and spend two days just to find everything okay on such an intermittent condition ... cuz it probably would not be there at that moment. And the computer seems alright since everything else works and is acting the way it should. Something is setting this Code 96 Fuel Monitor Code ... does anyone know what else could be doing this or give advice on what else to check. I think I checked everything but certainly something could be hidden in a harness (not going to rip them apart w/o a problem indicator).
Any help or good technical suggestions would be appreciated!!!