Question about 1994 Ford Ranger Supercab

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Not firing on two cylinders

I have changed both coil packs, o2 sensor, mass air flow sensor, and IAC.

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Stop spending money do parts swap with cylinder that are firing. If this has helped please list as helpful or fixya or go live chat and we can talk about it

Posted on Jan 13, 2009

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Sounds like you have V-6 which were pron to have head gasket issues
and what you are describing sounds to me like a blown head gasket.
Before going through all the diagnostics, and spending money on unneeded
parts, I recommend looking at the oil dipstick for traces of coolant and/or testing the coolant for the presence of hydrocarbons. This is a simple test that any auto repair shop should be able to do by dipping a strip of paper into the radiator and
seeing if it turns a certain color. If it shows positive for hydrocarbons then my guess is you have a blown head gasket. You might also want to get a compression test done (you can do this yourself very easily with a gauge). This should definitely tell you if there is a head gasket problem.

Posted on Jan 13, 2009


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1 Answer

03 Nissan Altima showing codes P0304,P0102,P0154,P0113 what are they and how do i repair the problems.

Hi Chris.

p0304 = Number 4 Cylinder Misfire Detected

Faulty spark plug 4
Clogged or faulty fuel injector 4
Faulty ignition coil 4
Fuel injector 4 harness is open or shorted
Fuel injector 4 circuit poor electrical connection
Ignition coil 4 harness is open or shorted
Ignition coil 4 circuit poor electrical connection
Insufficient cylinder 4 compression
Incorrect fuel pressure
Intake air leak

The P0304 code means that the cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 4.

p0102 = Mass or Volume Air Flow Circuit Low Input

Faulty mass air flow sensor
Intake air leaks
Dirty mass air flow sensor
Dirty mass air filter
Mass air flow sensor harness is open or shorted
Mass air flow sensor circuit poor electrical connection

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner.
Reset code and drive vehicle.
If the code comes back, it may be necessary to replaced the mass air flow sensor.

p0154 = O2 Sensor Circuit No Activity Detected Sensor 1 Bank 2

Faulty Front Heated Oxygen Sensor Bank 2
Front Heated Oxygen Sensor Bank 2 harness is open or shorted
Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks may be faulty
Exhaust gas leaks

Replacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem.

p0113 = Intake Air Temperature Sensor Circuit High

Faulty Intake Air Temperature (IAT) sensor
Dirty air filter
Intake Air Temperature (IAT) sensor harness is open or shorted
Intake Air Temperature (IAT) sensor circuit poor electrical connection

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM).The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.

Hope this helps

Mar 26, 2017 | Nissan Cars & Trucks

1 Answer

Half of the engine not firing

If half the engine isn't firing, it may need a new coil pack. Most v6 and v8 engines have a coil pack for each side of the engine. Try swapping them around to see if the other side works; then you'll know. If it's not a coil pack, it's because your car has variable cylinder management, and it has electronics issue.

May 09, 2017 | Cars & Trucks

1 Answer

Start the car then goes off,.the engine start then it goes take your foot off the excelerator,it goes off

Check, MAF mass air flow sensor, IAC idle air control valve, O2 sensor. Is the engine light on? if not then you may have a vacume leak. Before you do any thing please check the compression in all they cylinders.

Sep 19, 2011 | 2000 Ford Expedition

1 Answer

I have a 1998 Subaru Forestor and recently it started chugging here and there when I gas it. The check engine light comes on and sometimes goes off. I had it plugged in and the codes said...mass air flow...

did you in fact replace the O-2 sensor as well?
What about the ignition coil - have you tested for ohms resistance? (in particular cylinder #3)
the coils are relatively inexpensive, and easy to test for sure. I think it is 10 ohms or less if I recall - similar with the spark plug wires... check those as well - they may be compounding the problem..
One last thing - check to be sure the spark plugs are all the way tight in the cylinders...
Best regards

Mar 07, 2011 | 1998 Subaru Forester

1 Answer

Vehicle running rough initial code misfire cyl 2 replaced plugs and coil pack still rough recheck codes and got P0172/P11341/P1151 O2 or mass air flow sensor ?

May be fuel injector on Number two cylinder, normally if it's the mass air flow it would affect all cylinders. You may have a sticking EGR valve or a PUrge canister valve stuck open, if you need to know how to check this let me know and I will give you more instructions. I also need to know if it's the 4 or 6 cylinder engine and if it has a automatic or standard shift I need this to help diagnose the problem more. The other codes is for the 02 sensor but you need to check the other stuff first before you mess with the 02 sensor. Thanks for using fixya

Jul 01, 2010 | 2002 Ford Taurus

1 Answer

02 sensor p0136 and cylinder misfire p0300

Most likely you do not have bad O2 sensor or coil sience you have P0300 code.
Check for vacuum leaks first , this is very common problem(vacuum leak) , lean mixture will cause misfire. I'm tallking about V6 engine , 4cyl have same problems but for misfire it may have bad coil (they under recall now).
Also check condition of air mass sensor , if it's dirty ,
buy air flow sensor cleaner and clean it according to user manual on the can.(air mass sensor can cause
O2 sensor code)
Check vacuum hose to fuel pressure regulator.
There are many more things to check , but that for mechanic shops after you try this.

Jun 10, 2010 | 2001 Audi A4

1 Answer

Missing in every gear..

you have to see if the coil pack fire up do you have spark coming out of the coil pack cylinder 2 never mind the other code the missing cylinder make the other sensor malfonction check if you have spark coming out of the coil pack if not change the coil pack if you have you spark check the compression let me know pierre please dont rate right away we work together to fix our problem because i whant you to get our car running good and i whant a fixya anything else is bad for me thanks pierre

Feb 25, 2009 | 2002 Mitsubishi Lancer

1 Answer

Backfire and spits and sputters

checked the O2 and mass air flow sensors (shot in the dark) O2 sensor is on your exhaust manifold and the mass air flow is on your intake might be sending bad signals to your electronic control module (ECM) another scenerio hope this aint your situation had same problem on 3.0 liter engine turned out after trying everything to be burnt valve so a compression check might not be bad idea hope this helps

Aug 27, 2008 | 1998 Chevrolet Malibu

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