Hyundai Forums banner

1 - 5 of 5 Posts

·
Registered
Joined
·
2 Posts
Discussion Starter #1
automatic, 4cyl base model

stopped at a light, when it turned green, pressed the gas and car started super slow.

pedal is now floored, barley going 20mph, taching up to 3k. transmission doesn't shift - only works if I manuel shift it.

sounds like a moped putting, engine shaking violently, mis firing, exhaust is hot coming out of the pipe.

code reader says p0300

changed the spark plugs, checked the compression - all 4 are the same level - 180.

checked mass air sensor, cleaned it, shook the plug and wires to see if it affected the rough running engine, didn't change. sprayed water/soap on hoses and area to check for leaks - none.

let it idle 20 minutes, while checking on temp before and after the catalytic converters. noticed first one - hooked to exhaust manifold is glowing red hot.

is that a tell tell sign it's plugged even though exhaust is still exiting out the tail pipe ? exhaust is hotter then usual.
 

Attachments

·
Registered
Joined
·
17,552 Posts
Plugs, wires and coils is regular replacement parts

Glowing red,,, you likely into converter from the misfires, and maybe clogged downstream cat in front pipe if primary cat break apart
 

·
Banned
Joined
·
7,039 Posts
automatic, 4cyl base model

stopped at a light, when it turned green, pressed the gas and car started super slow.

pedal is now floored, barley going 20mph, taching up to 3k. transmission doesn't shift - only works if I manuel shift it.

sounds like a moped putting, engine shaking violently, mis firing, exhaust is hot coming out of the pipe.

code reader says p0300

changed the spark plugs, checked the compression - all 4 are the same level - 180.

checked mass air sensor, cleaned it, shook the plug and wires to see if it affected the rough running engine, didn't change. sprayed water/soap on hoses and area to check for leaks - none.

let it idle 20 minutes, while checking on temp before and after the catalytic converters. noticed first one - hooked to exhaust manifold is glowing red hot.

is that a tell tell sign it's plugged even though exhaust is still exiting out the tail pipe ? exhaust is hotter then usual.
Plugged exhaust system. Probably downstream.
 
1 - 5 of 5 Posts
Top