Question about Cars & Trucks
Could just be due for a full tune-up. How many miles has it been since it has been serviced? How many miles are on the oem spark plugs? May need to take it to a certified technician and have it diagnosed.
Posted on Jun 14, 2014
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Posted on Jan 02, 2017
i think u have a bad fuel pump, switching unit does nothing but not allow fuel to be pumped from tank to tank, for example if useing rear tank lets feul flow to engine not iti nto frt tank,when it goes bad you will see gas flowing out of frt tank because its pumping into tank from rear tank,good luck.check fuel preasure w rear tank is on.
Posted on Oct 06, 2009
Testimonial: "Thanks for the response. I checked w/the Ford dealr parts guy who said each tank pumps directly 2 engine. Not sure how it works on other trucks tho."
Have the cars on board diagnostic system read. An autoparts store like Autozone will plug in and read the codes for free sometimes if you are at their store. Or just visit a trusted local garage and ask for a read. It only takes a few minutes to read the computer with a industry standard OBD2 code reader. I bought one on ebay for 35 bucks for myself.
If you have codes but no continuous "Check Engine" light showing on the dashboard you may have missfires related to certain controls/sensors slowly going bad on your engine. Or you could have something outright mechanically wrong with the car like a vacuum leak or a clogged EGR valve.
Also, is this coughing causing other driveability or fuel ecomony or power issues? That can also be indicative of what kind of problem you are looking at.
If this problem persists but is minor....eventually the computer will send you the check engine warning. Sometimes it takes 1000's and 1000's of missfires to get a check engine warning! That's because of tolerances built into the software the cars computer is using.
Posted on Dec 16, 2009
The tank is not venting. The regulator is like a relief valve for the fuel injection. So it would not be the regulator. Evidently the vent on the top of the fuel tank is not venting properly.
Posted on Dec 13, 2010
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