I'm reviving this thread, I think its time i need to get a new ignition coil. It's been raining a lot lately and i just can't deal with the bogging it's been doing once it's fully warmed up. As soon as that thermostat opens up it feels like i lose half my power. I have to avoid a road i take home to work every day because of the fact that the incline of it is very steep and i have to keep the car locked in 2nd Gear and Throttle just under the first gear shift point to maintain 30mph up the hill. I don't know what the problem is at this point.
I've got 3 ideas.
Distributor is dying.
Fuel Pump is not able to provide enough pressure, and going bad.
or my Ignition Coil/Cap is shot.
Seems like the power loss mainly occurs during very wet or hot days. It's been persisting like this for quite a few years, but it seems like after i had to leave it on jackstands for a few months it just got worse than what it was before. If i have a passenger in the car, it really really struggles unless I'm kicking it at about 60% throttle to get off the line to keep up with people behind me.
During all gears, it will take off pretty slowly, but as soon as i hit the higher range of RPM, i get an almost VTEC kind of feeling from it after about 4000RPM and all of a sudden it has a massive amount of torque compared to what it did before.
Engine is a 2nd Gen 4AFE paired with an A131L 3 Speed Automatic. 151K
I've replaced:
Rotor
Wireset
Spark Plugs (NGK V Power Coppers gapped at .032 ~)
Air Filter(I even took out a section of the snorkel to see if it would help, and because the fastener split in half)
Coolant Temp Sensor (seems like after this it was worse to be honest, but may have been a coincidence and probably was)
Fuel Filter
Things I don't know are bad or not
Oxygen Sensor
Catalytic Converter (leaks anyway, waiting for it to just fall off so i can get rid of the cat)
Fuel Pump (can't hear it make noise when i start it, but to be fair i never really could, i got it at 90k miles)
I seriously doubt it's a lack of back pressure related issue, because I had a cracked manifold for awhile and the flange going to the flex pipe was barely held on, along with a disconnected muffler and it still ran better then than it does now.
I've heard you can test the Oxygen Sensor on OBD1 systems using the diagnostic port under the hood, but i have no idea what pins to jump to check values.
No CEL,I've pulled the Oxygen Sensor plug and let it idle and it seemed like it ran worse, I've also pulled the plugs on various sensors to see how they run without them to see if i'm having an issue at all
pulled the Plugs to each fuel injector One by One to see if they don't affect the idle or not, they all do, so i know they're good. I also did this with each spark plug wire to verify that as well, all changed idle.
My only lead i think i can have at this point are the Ignition Coil, Oxygen Sensor, or Fuel Pump causing the problem.
If anybody has any advice on what to do at this point, i'm open for ideas. I've adjusted the timing back to it's default 10 Degrees, but honestly it felt like it ran so much better at the 17 Degrees i had it at for a week just to see what kind of gas mileage i'd get.