Question about 1996 GMC Sierra

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Fuel contamination, what do i need to do to repair?

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  • Mike Butler
    Mike Butler May 11, 2010

    What's in the tank,(contamination) and how full is tank?

  • josh1111 May 11, 2010

    with what? **** it out with a hose

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Basically, no matter what contaminated it, you gotta clean it out. even water. worst case is drop the tank, empty and flush with clean fuel. replace tank, replace all filters, disconnect the fuel line at the engine end and turn on and flush with clean fuel... and hopefully your fuel injectors survived. if just water, they will probably be fine. if something like sugar was dumped in your tank, that is not fine. change your oil and oil filter too. and cross your fingers.. in fact change your oil again after one day. and cross your fingers again... maybe even a third time... and you know what to do next ... sugar is bad bad bad for engines. if it got in the crank bearings cam bearings, into the push rods, lifters, on and on and on, its like pouring sand inside the engine.

Posted on Mar 27, 2009

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My car fuel consumption is high, what can be the problem


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Then put in fresh fuel, a new fuel filter and see how it runs. The injectors can be spray tested to see how they are working. You need someone familiar with diesels to work on your engine.

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if you let the tank get too low then it could mess up any contaminants inside the tank or as you say poss water in fuel from supplier, no way of proving either.one question though ? what was wrong with fuel pump...should last 80k at least...if you have an inline paper fuel filter under bonnet this will show any contaminants... very rare....

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How could the pump failure contaminate the injectors when the fuel filter will catch all debris. Sounds like someone is trying to take you for a ride! Shop around for a honest repair shop,there out there! Have the fuel pump and fuel filter changed and you should be fine.I hate when shops try taking advantage of customers.
Good Luck hope things work out.
Afra GG

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When this happens Ford says you must replace the MAF since they cannot be repaired. With a dealer cost of about $177.00 and about 1.5 hours of labor the repair is not very expensive. However Ford is not correct. This problem can be fixed and it can be done by just about anyone.
What you need to do is go to the local Radio Shack and get a can of spray tuner cleaner, #64-4315. Or a MAF cleaner at any Auto Parts store. Disconnect the NEGATIVE battery cable and remove the MAF from the vehicle. Spray the inside of the MAF with the tuner cleaner. Be very careful when you spray the hot wire. It is very thin and if it breaks, you will have to replace the MAF. Clean it well and let it air dry for 15 or 20 minutes.
Don't use carburetor or brake cleaner. They leave a residue and you will be right back where you started. Use ONLY the tuner cleaner, MAF cleaner which dries residue free. When it's dry put it back in the vehicle and reconnect the NEGATIVE battery cable. You will need to drive the vehicle several miles to let the PCM "relearn" your specific driving conditions. Once that is done the codes will not come back and you should notice all the symptoms are gone as well.
Good luck and keep me posted, be glad to help you get your car running 100% soon. 

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