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97grandam w/history coilhousing problems.runs rough, fan stays on

Trouble codes 1) po300-random/multi cylinder misfires; 2) po440-evap emission control system malfunction; .3) po502-vehical speed sensor A circuit low input... Replaced housing but not coils themselves.. boots not changed but looked fine.. plugs new.. Still runs rough, fan always on even when just started, idles low then sometimes high. engine temperature light never gets to previous temp levels. could this be a ignition coil problem as usual or maybe a sensor problem? I dont have many tools or the knowledge to do alot of testing.

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  • Anonymous Mar 24, 2014

    my 2000 toyota tundra doesnt idle very high and wont start very easy when cold I just replaced starter, after you get it started it runs fine but idles low

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#2- check for broken or missing hoses around your leak detection pump. #3-posibly just as easy as replacing the speed sensor.

Posted on Jan 08, 2009

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How to fix obd2 trouble code P1680 on a 2004 Isuzu ascender 4.2l eng


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most likely low fuel pressure and injector problems
code p 0442 refers to evaporative emission (EVAP) system ---small leak detected ===causes hose connection/s--intake leak-- EVAP canister ---EVAP canister purge valve
it also refers to --large leak detected ===causes ---petrol cap loose ,/missing---mechanical fault ---EVAP pressure sensor
code p 0455 refers to EVAP ---large leak detected --all those stated plus EVAP canister purge valve
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Trouble codes how to find the problem by the codes


(02 sensor )po153=bank 2 sensor 1 slow response,(o2 sensor) po154 =bank 2 sensor 1 stays centered not rich not lean, po300 = multiple cylinder misfire ,po444 = evap purge selonoid circuit,open or shorted the one that is a concern is evap on the others may clear after you fix evap code.

Sep 30, 2014 | Cars & Trucks

1 Answer

P1300


Error Code: P0301
Description:
Cylinder 1 - Misfire Detected
Possible Cause:
Wiring.
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine control module (ECM).

Error Code: P0302
Description:
Cylinder 2 - Misfire Detected
Possible Cause:
Wiring.
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine control module (ECM).

Error Code: P1300
Description: Random Misfire

Possible Cause:
As above.

Jan 22, 2014 | 1996 Honda Civic

1 Answer

2003 nissan xtera po300 random multiple cylinder misfire won't go away. I have done new spark plugs, new ignittion wires. I have fixed vacume leaks as well. Help please thank you.


Trouble Code: P0300

Multiple Misfire Detected

Possible Causes:


Air leak in the intake manifold, or in the EGR or PCV systemBase engine problem affecting two or more cylindersCMP or CKP sensor signals erratic or out of phaseEGR valve stuck open, or EVAP purge system has failedFuel delivery component fault that affects more than 1 cylinder (i.e., contaminated, dirty or sticking fuel injectors)Ignition system problem affecting two or more cylindersVehicle driven while quite low or until it ran out of fuel

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1 Answer

What do all these codes mean PO135-PO300-PO404-PO102-PO440


po135 is o2 sencer on drivers side. will be the first one. po300 is random/multiple misfire.po404 is a egr code. po102 mass air flow circuit low input. po440 evap emission control system malfunction

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02 hyundai accent engine quit running won t start codes come up po300 po301 po302 not familiar with 4 cylnders when turning over sounds like no compression


codes p 0300 is random misfires and codes p0301,2,3,4,5,6,7,8 are the cylinders that are misfiring
so un you statement the problem cylinders are 1 and 2
misfires are normally problem injectors and low fuel pressures so have the fuel pressure checked to make sure that the pump is running correctly, the pressure regulator is operating correctly ans the EVAP system is venting the tank correctly
use a couple of injector cleaner in the tank to clean the injectors

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My 98 sonoma truck runs but lacks power with service engine soon light on .trouble code reads po300 cylinder misfire detected (random) what dose this mean


See also: P0300 diagnostic code @ OBD-Codes.com
Possible Causes:
Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

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2 Answers

Engine codes po300,po420,po430,po446 is what codes poped up when hooked up on computor.


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2 Answers

My 01 chevy blazer will idle rough. it gives me error codes, p0300 and p0135 and p0141. where do i find these problems


Hello your po135 is o2 sensor bank 1 your po141 is O2 sensor bank 1 sensor 2 and your pO300 is random multiple cylinder misfire these problems are your oxygen sensors and engine misfire pO300 is you engine missing o2 sensors are switches in the exhaust system the engine misfires are the engines cylinders missing.

Jan 05, 2011 | 2001 Chevrolet Blazer

1 Answer

Lack of fuel when accelerating


This might help. It looks like you O2 sencor had gone bad or the signal has and causing multiple mis fire. according to your codes. 
PO171 System too Lean (Bank 1

PO174 System too Lean (Bank 2)

PO300 Random/Multiple Cylinder Misfire Detected

Causes of PO300
Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns

I'ld start with chaning the O2 sensors first but sheck for bad wire connection. Hope this helps and good luck

Apr 08, 2009 | 2004 Ford F150

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