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2007 taurus random misfiring with p1235 code

Replaced coil, plugs; wires; cam sensor ; fuel filter

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

dustyboner
  • 331 Answers

SOURCE: 2000 Pontiac Grand AM trouble code P0300

Im surprised that didn't fix it. On the Quad4 engine its usually a cracked coil housing.
Have you checked:

  • fuel injectors / fuel pressure
  • coolant temp sensor
  • compression - to check for bad head gasket
  • ignition control module
  • EGR system - make sure the valve isn't stuck
  • crank position sensor.
The crankshaft position system variation compensating values are stored in the PCM non-volatile memory after a learn procedure has been performed. If the actual crankshaft position system variation is not within the crankshaft position system variation compensating values stored in the PCM, DTC P0300 may set.

Posted on Oct 15, 2008

  • 19 Answers

SOURCE: S10 pickup misifirng when light highway load

I had to rebuild my engine at 97000 miles cuz of low engine oil pressure and bad berrings

Posted on Jan 09, 2009

  • 1 Answer

SOURCE: service engine soon light keeps coming on. Now low coolant light

I would start by doing an oil change myself so you can examine the oil and look for water/antifreeze in it. You will be able to see it separate from the oil and you can smell the antifreeze. If there is then you have a leak between the water jacket and the heads somewhere. More than likely the LOWER intake gasket is leaking into the head. You said they replaced a gasket but was it the UPPER or LOWER? If it was the LOWER did they use RTV in the correct areas? Did they torque the intake bolts to the correct pressure and install the bolts correctly? I know you don't have these answers but these could all be part of the problem. It may be leaking more at #2 cylinder and causing it to foul more than the others. Also just because a mech pressurized the coolant system and didnt see any change in pressure (hopefully he wasn't just looking for visible leaks) the issue may not happen until the engine is hot, as metals behave differently when heated, especially aluminum which the LOWER intake is made. Have a mechanic or mechanically inclined friend (gearhead) remove the #2 plug wire, then kick the engine a few times without starting it, enough to let any fluid get into the chamber, this would include gas btw. Then remove the plug and look for any wet residue on the plug, gas will evap. quickly, antifreeze/oil won't. again try to smell the residue and if necessary, lightly touch some to your tongue, antifreeze has a sugary sweet taste that is easily detectable. Remember any time you are working with chemicals such as waste oil and especially anti freeze, minimize spills and clean them up quickly and completely and place the spent fluid in a sealable container and take them to a collection center for disposal. Waste oil is a carcinagin (cancer causing) agent and antifreeze (glycol) new or old will kill any animal (child, dog, cat,etc) that ingests it. Many auto parts stores and some other retailers that sell oil and antifreeze will take your wastes if you bought the replacement fluid from them, check before you buy.

Posted on Apr 04, 2009

  • 66 Answers

SOURCE: replaced plugs wires coils and still eng. misfire

ok. You mentioned shampoo? meaning you cleaned the engine and compartment. And ran out of gas.
Sometimes if we wash the engine, water can hide in some spots like getting into plugs and such. If so, that plug may have been damaged. change the fuel filter as well, if you have ran out of gas.

if smell rich, well you just may be on the right track. Not enough air. Be sure to check all vacuum hose to ensure you don't have a leak somewhere that we are not catching.

Posted on May 05, 2009

seanpwright
  • 2030 Answers

SOURCE: My 2001 Grand Am is randomly misfiring. Have

Has the ECM been checked, and all the igniotion connectors.

Have the fuel injectors checked you may have a bad one or two, or possibly bad gas, or a low fuel pressure problem.

Posted on Nov 09, 2009

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My car keeps randomly going into limp mode


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Ford taurus p0300


Neither was the problem on a 2007 vehicle,still sort of new

You do need to change plugs every 3 years

I would change the Front Oxygen Sensors, if you have 100,000
miles on them---still not the misfire issue

The misfire is the ignition control module, if that is what you have,
since you mentioned plug wires,some motors have individual
ignition coils & they fail a lot on a ford

Those codes are of no use, their random misfires & misfire
on first 1,000 rpm when starting the motor

Have to diagnose each cylinder & any module issue

Whom ever did your work failed to do anything but replace
parts,no road test,no scanner data checking or code diagnoses

Don't go to the chain store or auto parts shops
Go to an old time local shop

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I have a 2007 ford taurus with p0300-p0303, p0306, p0316, p2195 and p2196. engine doesnt start anymore but battery is fine.


The old give me money for nothing statement from a mechanic instead of knowing how to fix it.
code p0300 refers to random/ multiple cylinder/s misfire detected===causes--spark plug/s---HT lead/s---injector/s---ignition coil/s--low compression--wiring
code po303 refers to cylinder 3 misfire detected--- engine mechanical fault---wiring---ignition/ fuel system---injector --ECT/MAF sensor --- ECM
code p0306 refers to cylinder 6 misfire detected===causes --engine mechanical fault---wiring---ignition / fuel system---injector ---ECT/MAF sensor---ECM
code po316 refers to misfire detected during start up--first 1000 revs==causes--engine mechanical fault---wiring---ignition /fuel system---injector
code po2195 refers to heated oxygen sensor (HO2S) 1 bank 1 signal stuck lean===cayses ---HO2S---fuel pressure---injectors---intake leak
it also refers to O2S sensor 1 bank 1 same causes and also refers to HO2S 1 bank 1 implausible signal===causes --- short to positive---short to ground---Ho2S ---ECM
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Have a compression test done some where else and it will indicate the condition of the motor. The rest is sensors and wiring problems.

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98 Pontiac GRAND am


The plugs and crank sensor could have done it, but the TPS and idle air control would have nothing to do with a random miss.
A more likely cause is the ignition module or a fuel problem. You may have to wait until the problem is bad enough to kill the engine or you have more codes to check out.

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