Engine loses power

Ecessive power loss cant get a nswer

Have you checked the mass air flow sensor

I Replaced o2 sensors, MAF sensor, and fuel filter. Fuel pressure was tested and is fine. No help. All plugs extremely fouled. Codes were pulled and said something about MAF sensor which we replaced. I found a thread on another forum where someone had unplugged the MAF sensor and it defaults the vehicle to factory settings. Now the truck runs hella better but not good, its driveable now sometimes it will idle low and stall out. But full power. Im guessing this means there is indeed a problem somewhere in the MAF system? I highly doubt the new MAF sensor is bad, I dont even think the old one was bad. What else could it be? The cables?

Thanks.

I have a 1994 ford Ranger 2.3L. It idles rough and sputters. It has 0 power when I put it in gear and try to go. I have replaces fuel filter and all plugs and wires and cleaned the maf sensor. I got obd1 codes 57, 72, 41, 33, 38, and 25 out of it. I need my car to run so I can work PLEASE!

The engine has all of it's power when it is in park and the throttle responds fine. But the moment it is put into gear, the engine has a rough idle, stalls out, and has no power. You have to floor it to reach 10mph. The engine does not rev up high either when it is put in gears either. The engine seems to not even try. I'm assuming it has a bad fuel/air ratio but I don't know what it could be. Again, it is perfectly fine when it is in park.

The motor was just replaced. It has had this problem since the swap. It's not a clogged catalytic converter or fuel pump because it didn't have that problem before. I don't understand how any of that would make it run fine in park but not in gear. I cannot get codes from it because I would have to drive to a dealership because it is too old of a car and it isn't drivable. The new motor has 80k miles on it and had a tuneup before it was pulled from the donor vehicle.

How can I check that?

I checked the negative cable and it is fine. I was finally able to pull the codes from the OBD and I fixed the few codes it gave me and it has not fixed the problem at all. The problem only arose after replacing the motor. I do not know what else it could be

No noises. No vibration. No tire wear. No power steering leaks. No steering wheel play. Just cruising along and then truck pulls soft or hard to the right and must turn back to left to straighten out.

You said you do not have any tire wear, but are the tires you have on now all the same. Because I had the same problem with my ranger and it turned out to be the different tires because of the tread types.

Mass air flow sensor and throttle position sensor but those were both replaced and I'm getting no codes now. If the catalytic converter was clogged, would I get a code for that and would it cause the loss of power under a load? If there isn't a code for that how can I check it without a vacuum gauge or removing it? I've heard I can remove the O2 sensors and that if it runs alright like that it means it's clogged. How effective is that?

I was having the same issues and I mean exactly. I changed the fuel filter and nothing. I changed the air filter and it fixed it. No one ever says to change that and air flow especially under a load like putting it in gear is EVERYTHING I repeat E V E R Y T H I N G. Auto experts do not impress me.