Engine Performance problem
1998 Honda Civic 4 cyl Two Wheel Drive Automatic 130.00 miles
My '98 Honda Civic has a very strange problem, mechanics can't figure out.
When it's cold, it usually runs perfectly, but as soon as I start driving for a few minutes, first the rps start jumping up and down out of control, then the car starts losing power when you accelerate, and starts jerking, it never turns off, but it jerks badly, it's not the transmission, because it does the same engine sound when you accelerate with the car parked.
The car sounds fine in idle, when you accelerate is the problem, it has some sort of broken sound coming from below(maybe the catalystic converter?)
Check engine gives codes of 300-304-ign misfire and 1399.
Replaced cables, spark plugs are fine, distributor, timing belt seems fine.
Dont know what to check anymore
I appreciate any help, thanks!
Saturday, August 8th, 2020 AT 11:25 AM