Question about 1999 Ford Taurus

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Hi, I have been here before and felt I got good resonse...basically agreeing with everything I was doing to fix the repeated Engine light coming on. So here we go for further diagnosis... RECAP: All the engine light alerts were for a cylinder one misfires. I went down the list and performed and replaced everything that supposedly could be done of this indication. Did plugs, wires, (car died..and had towed)...replaced Fuel pump and filter...light still came on...swithced wires on cylinders,...replaced fuel injector...coil. Finally, last time light showed misfires on 5 and 6. This time took into a Ford Dealer. They verified camshaft synchronizer off timing. removed and reset sychro timing as needed. Performed Koer self test and verified code cleared. Tech took for a drive...runs, idles nice...but he also found car hesitating upon acceleration. Took back to shop and performed fuel system test and found low fuel pressure (20psi). According to dealer proabalby fuel filter or pump... I just had those replaced??? What should I do? Can one check if filteror pump working...I think still wihin wuaranty...Getting frustrated....car only has 85,000 on it. Jim

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  • Ford Master
  • 1,041 Answers

Check for damaged or leaking fuel lines, also check fuel pump fitted correctly & pipe work not kinked causing low fuel flow, or it could be faulty fuel pressure regulator You may just be unlucky & it may be a faulty fuel pump,just because its new doesn't mean it can't be faulty

Posted on Mar 22, 2013

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  • Expert
  • 68 Answers

Did you check the fuel pressure regulator or you have a plugged fuel return line / fuel pump accumulator

Posted on Jul 06, 2013

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6ya6ya
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SOURCE:

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Posted on Jan 02, 2017

chuck943
  • 783 Answers

SOURCE: engine code p0307 cylinder #7 misfire

It could be carbon deposits on valve seats keeping valves from totally closing. You can try getting you a can of motorcraft PM3 top end engine cleaner and get engine up to operating temp then remove one of the small vacuum lines from the intake and draw the contents of the can slowly into the engine.After you have drawn in the contents shut engine off and let it soak for about 45 minutes then crank it back up and let it run until it clears. Now it will smoke like a forrest fire while you are doing this so don't be alarmed,just tell the neighbors you are spraying for mosqitos.This may cure the problem. If not you may be looking at a valve job.
This can be verified with a compression test if this is what is causing it.

Posted on Feb 05, 2009

  • 80 Answers

SOURCE: 2002 Ford Ranger check engine light indicating misfire

Code P0301
Ignition Coil Pack
Ignition Cable
Spark plug
Clog or dirty fuel injector
Evap canister purge valve
Engine Compression
fuel pressure

you have 3 type of engine for your truck
2.3L 4 cylinder
3.0L 6 Cylinder
4.0L 6 Cylinder

need to know that type Engine

The reason why the service light come on because it is a hard code
not a soft code.

Let me know

Posted on Sep 20, 2009

toneman2121
  • 775 Answers

SOURCE: blinking engine light,cylinder 6 misfiring,sputtering , changed w

flashing light is missfire code. if all that is good, the coil pack is bad. or the signal to fire the coil. unless of course you have a distributor. then you might have a bad cap or rotor, igniton module or pick-up assembly.

Posted on Mar 11, 2010

alicantecoli
  • 22484 Answers

SOURCE: 92 Ford F150 4.9L. starts good, idles rough, dies at slow speeds

4.9 litre ?? you having a laugh its a 10ton truck engine not a pick up -global warming machine,remove the pump/sender unit and check the gauze filter also look inside tank for a something floating around ,i think the idles is not a related problem to the vehicle losing power but their is a possibility you could have a problem with the little vac operated thing on the fuel injector line that allows the fuel through only when the engine is running

Posted on Mar 15, 2010

dttech
  • 4803 Answers

SOURCE: vehicle came in for check

A misfire at idle that smooths out at cruise is ALMOST ALWAYS caused by a vacuum leak. Take a hard look at your fuel trims at idle. If the Bank 2 Long Term Fuel Trim is more than + a couple points higher than the Bank 1 trim, your problem is most likely a vacuum leak. If the Fuel Trims even-out while holding the engine at 2000 RPM for about 20 seconds, then a vacuum leak is DEFINITELY your problem. I would suspect a leaking lower intake gasket leak because an upper plenum leak will normally affect all cylinders.

Posted on Jan 30, 2011

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