Here's what's going on with Lex (1999 Honda Civic LX):
Knocking sound coming from exhaust
Slow acceleration
Increased vibration in the passenger compartment
Check Engine light comes on and will sometimes flash
OBD-2 check at Advance Auto reports:
P0301: Cylinder 1 misfire
P0302: Cylinder 2 misfire
P0303: Cylinder 3 misfire
P0300: Multiple misfire
P1399: Ignition system misfire
Plugs are old, but not significantly damaged or fouled.
Having talked with my father about this, he thinks it might be the fuel filter. I talked to a guy at O'Reilly Auto Parts who thinks it might be the MAP sensor. The guy who ran the OBD-2 scan at Advance Auto doesn't think the MAP sensor is very likely.
This thread over on
honda-tech suggests that it could be the MAP sensor. Or the fuel filter (I'm assuming that a clogged fuel filter could cause insufficient fuel pressure). Or the distributor/plug wires. Or a couple of other things.
What do y'all think?
I had just been riding Cyclone instead of driving, but the weather is getting to the point where I really can't do that. :(
ETA: Following
elizilla's advice, I started by replacing the fuel filter. That didn't help, but it was only a $20 part and not too terribly hard to replace. Next step is to replace the plugs and wires.
ETA2: I tried to pull the MAP sensor last night but the screws securing the sensor to the throttle body are too beat up for me to get off. I'm taking it to
Imports Only to let them have a crack at it, 'cos my folks have told me that they'll help me out with this.
ETA3: I am embarrassed. I took it to Imports Only. They replaced the plugs and plug wires. It runs again. I could have done this myself. Note to self: CHECK THE OBVIOUS!