phisherman162
New Member
- Joined
- February 29, 2008
- Messages
- 9
- Reaction score
- 0
- City, State
- Aloha, OR
- Year, Model & Trim Level
- 1991 Explorer 4.0
So here is the deal:
91 Ex, 150,000 miles 4.0 Auto
Burns 1/2 a quart of oil per 3000 miles, coolant levels are good, never change. Tranny fluid level good, plugs were fine 6 months ago.
Heading up hill, I have a horrible loss of power. Even when I have my foot all the way in it, it won't go. On flat ground, she runs fine, other than a little hesitation now and again. I wouldn't call it a miss, it just drops the RPM's for a split second. I changed the air filter today and took it out for a test drive. Heading up a fairly steep hill, it started losing power and the temp started climbing. It never got out of the "Normal" range, but it got up in a hurry. About half a mile up the hill, I turned around and headed back home. As soon as I turned downhill, the temp dropped immediately. I have been having intermittent problems with this rig for about a year, but never anything that took it off the road. The Overdrive dropped out about a year and a half ago, but it has ran fine regardless. Torque converter still kicks loose when you take your foot off the gas.
Timing? Sensors? Tranny? Fuel?
Here is what I have replaced:
Fuel Pressure Regulator, 1.5 years ago
Fuel filter, 1 week
Air filter
Changed oil 1 week ago
New exhaust from the header back, 6 months
Radiator, 2.5 years ago
Alternator 2 years ago
New hoses and belts 2.5 years
Tranny filter 2.5 years ago
3 years ago the previous owner put about $4500 into the rig replacing every gasket, fixing every leak and replacing everything that looked worn.
I need to find a list of the different sensors that could cause the problem and how to test them. (both O2, TPS, MAF, Exhaust Gas, etc.) This is my only rig and I am stuck taking the bus 2 1/2 hours 1 way to work every day. Any help would be appreciated.
91 Ex, 150,000 miles 4.0 Auto
Burns 1/2 a quart of oil per 3000 miles, coolant levels are good, never change. Tranny fluid level good, plugs were fine 6 months ago.
Heading up hill, I have a horrible loss of power. Even when I have my foot all the way in it, it won't go. On flat ground, she runs fine, other than a little hesitation now and again. I wouldn't call it a miss, it just drops the RPM's for a split second. I changed the air filter today and took it out for a test drive. Heading up a fairly steep hill, it started losing power and the temp started climbing. It never got out of the "Normal" range, but it got up in a hurry. About half a mile up the hill, I turned around and headed back home. As soon as I turned downhill, the temp dropped immediately. I have been having intermittent problems with this rig for about a year, but never anything that took it off the road. The Overdrive dropped out about a year and a half ago, but it has ran fine regardless. Torque converter still kicks loose when you take your foot off the gas.
Timing? Sensors? Tranny? Fuel?
Here is what I have replaced:
Fuel Pressure Regulator, 1.5 years ago
Fuel filter, 1 week
Air filter
Changed oil 1 week ago
New exhaust from the header back, 6 months
Radiator, 2.5 years ago
Alternator 2 years ago
New hoses and belts 2.5 years
Tranny filter 2.5 years ago
3 years ago the previous owner put about $4500 into the rig replacing every gasket, fixing every leak and replacing everything that looked worn.
I need to find a list of the different sensors that could cause the problem and how to test them. (both O2, TPS, MAF, Exhaust Gas, etc.) This is my only rig and I am stuck taking the bus 2 1/2 hours 1 way to work every day. Any help would be appreciated.