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

I have a 92 bonnevile it cut off 15 minutes of driving I change the coil pack throttle position sensor upstream o2 sensor tune up camshaft sensor mass air flow sensor math sensor it is still cuts off


Are you loosing spark to the plugs or fuel to the injectors when the engine stops ? You have to know which system to troubleshoot the problem.

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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

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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
Ck

Mar 07, 2011 | 1998 Subaru Forester

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ENGINE IDLES ROUGH IVE CHANGED PLUGS WIRES COIL MASS AIR FLO TPS AMBIENT AIR IAC AND STILL SHOW MIS FIRE ON # SIX CYL ANY SUGGESTIONS THANKS


You might want to look at that injector for that cylinder.I worked on a GMC Jimmy that did the same thing and I also changed all the sensors come to find out that my injectors and the spider assembly needed to be changed.

Feb 23, 2011 | 1998 Ford Explorer

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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

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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

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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

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