Why does malfunction light come on & car misfires/pinks randomly?

fix the anti freeze leak --before you blow a head gasket

what your codes mean

Check Engine Light On, P0300 Random Misfire Code. A random misfire means your engine is misfiring, but that the problem is not isolated to one or two cylinders. It is jumping around in a random way from one cylinder to another. A random misfire code usually means the air/fuel mixture is running lean.

What the P0700 code means. P0700 is set when the PCM detects a malfunction in the transmission control system. This malfunction causes the vehicle to set a Check Engine Light and trigger a failsafe mode. Once the failsafe mode is set it will remain until the fault is repaired or normal operation is detected.

PO133 Oxygen Sensor Circuit Slow Response (Bank1, Sensor1)

code PO700 transmission control system malfunction. code PO300 random multiple cylinders misfire detected.possible could have bad spark plugs,clogged fuel injectors,faulty ignition coil or coils.low cylinder compression.

Smoke test entire vehicle for vacuum leaks

You don't have any idea where the misfire
is from, at this point,find out

You installed parts

That is not what you do,you diagnose & find
the cause of the misfire,no parts involved there

You don't have the professional tools or software
at home, to diagnose without wasting time & getting
no where

Could have a bad intake gasket or mechanical problem
in one cylinder

How did you read that code on your car? A 92 Accord is supposed to give you pre-OBD honda codes, which are all below 100. Please check the code again and re-post it.

P0300 is a random missfire code. What exactly would you like to know about it??

compresstion

Random misfires are some of the trickiest problems to solve, usually an ignition system problem a bad or weak coil pack or possibly a spark plug wire. If not the ignition system then surely a clogged injector.

P0300 is a random engine misfire code. P 1781 is a transmission code, but it refers to a malfunctioning engine speed signal (crankshaft angle sensor). A bad crankshaft angle sensor or camshaft angle sensor can cause the P0300 code. A large list of items can cause a P0300 code, but since you have both, I'd be checking the crankshaft angle sensor and the related circuit. Sometimes, the mounting screws loosen up, which can cause the sensor to not function properly, all the time. Get this fixed, because over a period of 4 to 6 months, this can destroy the catalytic converter in the exhaust system ($$$$)
Charlie

take sample of your fuel into clear plastic bottle from fuel line
is there any water present?
this can cause these codes and then not go on storing codes for other bank even though that bank will be missfiring also due to water & P0300 Random/Multiple Cylinder Misfire Detected being logged
check all connections to coils/leads & wiring connectors
due to miss fire codes for cyl 1,3,5 all on the same bank
also look and check for air leaks on that bank (hose knocked off or splithose)inlet manifold gasket,brake booster etc...
3 injectors being blocked slightly on same bank posible!!!
check wires and signal

was it running like this b4 tune up & repairs?
this is what codes are
P0170 Fuel Trim Malfunction (Bank 1)
P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0303 Cylinder 3 Misfire Detected
P0305 Cylinder 5 Misfire Detected

the last code is for trans due to misfire/running lean on bank 1 probably a torque problem code

Hi,

To my knowledge, random misfire could be described as failure of any of the sparkplugs to fire in an unpredictable manner. A misfire is any of the plugs not firing but in a given time period, predictable. Random misfire on the otherhand comes and goes, sometimes it misfires, sometimes not. This is often an indicator of a loose electrical problem which is intermittent in nature.

The error code P0300 pertains to the above described random misfire or in some instances multiple misfire. The last digit (except when zero) wold points to which cylinder is not firing.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.