navajo with problems

elf024119 · 03-17-2011, 05:29 PM

ok I've been chasing issues around this nav for over a month now and figured out some but not all. Now the fuel problem is all but gone but the check engine light is on and it wont let me do a self tes either key on or off. no longer having the fuel starvation problem except when the external fuel pump gets hot.

*Anime* · 03-18-2011, 06:00 AM

You can get an Equus code reader for $10-25 to plug in and read codes, or just go on down to the local Autozone/Advance and they'll usually read codes for free as well.

Fixing whatever it is to take care of the CEL should take priority over guessing what's causing it. Once the CEL is gone you may still have things to figure out, but the stuff you wind up getting codes on will probably hint at other issues as well.

Fuel starvation could be anything from a bad fuel pump to a clogged fuel filter to a bad fuel pressure regulator, or even just a dirty MAF or bad TPS giving screwy readings to the ECU. Might even be clogged/dirty injectors from bad gas.

elf024119 · 03-18-2011, 12:22 PM

can not get codes when the tester is attached the cell just stays on solid no blinks at all. no blinks on testor and a solid beep. I believe the ecm self test has shorted out. The only sensor that seams to be effected by the new problem is the tps. since the cel has come on thair is no juice going to the tps wiring at all. Using a test light the injectors now pulse instead of a steady light, whare as before the cel came on it was a solid light no blink, the engine runs much smoother now than it did with the light out. The starvation problem is an overheating external fuel pump. No longer have a pump in the tank. All in all I think the ecu was going bad and was causing the problems in the first place. I will be looking for a used ecu at the local yard as soon as I have some money to put into the jo. Till then it can get me to and from work. It is possible that the ecm may have over juiced the new pump at some point causing it to overheat, have already contacted summit and they are sending a new pump to replace the current one, hope it comes soon. The pump is now on its own circut with a steady 12v.

elf024119 · 03-18-2011, 12:53 PM

If I replace the ecu does it have to be from a navajo or can I use one from an explorer?

mhallack · 03-18-2011, 04:03 PM

I'd think you'd be able to get one from an Explorer since a Navajo is essentially the same thing!!

03-17-2011, 05:29 PM	#1
elf024119 Wannabe Elite Explorer Belton, South Carolina 91 Navajo Join Date: Feb 2011 Posts: 21 Vehicle Specs (Original Poster)	navajo with problems ok I've been chasing issues around this nav for over a month now and figured out some but not all. Now the fuel problem is all but gone but the check engine light is on and it wont let me do a self tes either key on or off. no longer having the fuel starvation problem except when the external fuel pump gets hot.

03-18-2011, 06:00 AM	#2
Anime GREEN SCREAM!! Hattiesburg, MS '93 Sport 4x4 Join Date: Nov 2000 Posts: 4,192 Vehicle Specs	You can get an Equus code reader for $10-25 to plug in and read codes, or just go on down to the local Autozone/Advance and they'll usually read codes for free as well. Fixing whatever it is to take care of the CEL should take priority over guessing what's causing it. Once the CEL is gone you may still have things to figure out, but the stuff you wind up getting codes on will probably hint at other issues as well. Fuel starvation could be anything from a bad fuel pump to a clogged fuel filter to a bad fuel pressure regulator, or even just a dirty MAF or bad TPS giving screwy readings to the ECU. Might even be clogged/dirty injectors from bad gas. __________________ "I think man has always gone where he has been able to go, and I think that when man stops going where he can go, he will have lost a lot. Man has always been an explorer. To me, there's a fascination in thrusting out and going to new places. It's like going through a door because you find the door in front of you." - Michael Collins

03-18-2011, 12:22 PM	#3
elf024119 Wannabe Elite Explorer Belton, South Carolina 91 Navajo Join Date: Feb 2011 Posts: 21 Vehicle Specs (Original Poster)	can not get codes when the tester is attached the cell just stays on solid no blinks at all. no blinks on testor and a solid beep. I believe the ecm self test has shorted out. The only sensor that seams to be effected by the new problem is the tps. since the cel has come on thair is no juice going to the tps wiring at all. Using a test light the injectors now pulse instead of a steady light, whare as before the cel came on it was a solid light no blink, the engine runs much smoother now than it did with the light out. The starvation problem is an overheating external fuel pump. No longer have a pump in the tank. All in all I think the ecu was going bad and was causing the problems in the first place. I will be looking for a used ecu at the local yard as soon as I have some money to put into the jo. Till then it can get me to and from work. It is possible that the ecm may have over juiced the new pump at some point causing it to overheat, have already contacted summit and they are sending a new pump to replace the current one, hope it comes soon. The pump is now on its own circut with a steady 12v.

03-18-2011, 12:53 PM	#4
elf024119 Wannabe Elite Explorer Belton, South Carolina 91 Navajo Join Date: Feb 2011 Posts: 21 Vehicle Specs (Original Poster)	If I replace the ecu does it have to be from a navajo or can I use one from an explorer?

03-18-2011, 04:03 PM	#5
mhallack Wannabe Elite Explorer Rockland, Maine 94 XLT Join Date: Aug 2009 Posts: 105 Vehicle Specs	I'd think you'd be able to get one from an Explorer since a Navajo is essentially the same thing!!