Question about 1994 Ford Taurus

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Do you adjust the tps sensor on a 94 ford f250 5.8l when replaced

I was having problems with the truck dieing out. so i replaced the coil,ecu,fuel filter,tps,and rear fuel pump. these things did not fix it. it was the pickup coil in the distributer. now the truck has a different prob. it starts when cold,but runs rough. when its warm or hot its runs worst and stumbles to stay started, if i give it to much trottle, or put it in reverse it will die, and wont start till i hold the trottle to the floor. when it starts up it its verry verry rough with tons of black smoke, and cant put in drive till the engine starts to smooth out some, but never runs with good power. is it possible that the tps sensor needs to be adjusted, cause i just bolted it up. or could it be cause the breather hose in the rear gas tank neck is cut off.

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  • stsd285port Jan 23, 2009

    before i had the distributer replaced the lite came on. i had the codes checked at autozone. the codes came up mas air folw sensor, oxygen sensor, fuel pressure. the distributer fixed the dieing out prob, but now it runs like ****. could it be the vent hose for the rear gas tank. dose the 94 f250 have the switching vave in the tank or on the frame rail. the rear tank did not work for 2 years, so i replaced the pump and fuel filter. now when i use the rear tank with the new pump it pumps fuel into the front tank. sometimes it will stumble preety bad and ill switch to a different tank and it will start to run a little better, but with in a few minutes its running like ****. so on a 94 f250 with 5.8l the tps is not adjustable, for sure.i also put a new msd blaster coil thinking it went out, could that cause it to run bad.

  • stsd285port Jan 23, 2009

    also the spark plugs are auto lite single platnum, and are 3 years old. the wires are brand new.

  • stsd285port Jan 29, 2009

    if the distributer was 180 off the truck would not run at all rite.idleing and from take off it runs like ****, but once it is going for a while it starts to smooth out when i hold gas a a stedy pace doing around 40 mph, but once i step on the gas it goese them starts to stumble bad. i did notice when the engine is running i change the timeing and it will run like its new will tons of power no stumbling for a couple blocks, but then it will srart running like **** again. every time i change the timeing it will run better for a couple of blocks, then start to ack up again. also my timeing mark on the balancer is gone. also is there a certain way to adjust the more thing why dose it pump fuel from the back tank to the front tank, somw times if i change from one tank to the other while the engine is stumbling, sometimes the engine smooths out a little. any advice would be awsome. this is my snow plowing truck. it is hard to plow with all the fumes from the black smoke comeing trew the heat vents.

  • stsd285port Feb 04, 2009

    when i change the timing by rotating the distributer it will start to run decent, but not fully correct. it will idle good but when i press the gas then let off it will almost die, and when i rev it out just a little it will start poppin.even thogh i change the timeing and it runs better it will start to run really rough 10 minutes there a certain plug or something that needs to be unplugged, or jumped to change the timeing properly. dose the memory need to be reset afterwards. what is the proceduere of changeing the timeing on a 1994 ford f250 4x4 5.8l engine.

  • HomeTime May 11, 2010

    Is you check eng light on? If so take it to Autozone and get them to scan it. I would check the fuel pressure with a gage. Pull off the vac hose off the fuel pressure regulator and see if you have fuel in the hose if you do it would be the pressure regulator.

  • bob collins
    bob collins May 11, 2010

    Wish I had your money.;-D Have you taken it by a dealer to have them plug into ? Replacing so many parts makes it difficult to troubleshoot. If this is helpful, please post as such. TY



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Sounds like the fuel pressure reg . pull the fuse while it's running see if it smooths out before dieing.

Posted on Jan 23, 2009

  • HomeTime Jan 27, 2009

    Stupid question. could you of put the dis in 180deg out? could be the problem.Go back to the start and put the number one cyl at top dead center then look at the timing mark.

  • HomeTime Jan 29, 2009

    Truck would run with dis 180 out.She would pop but it would run. Re check rotation of dis and set cyl accordingly.


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No the tps sensor can not be ajusted , it has a spring in it that controls it, and for the gas hose i dont have a clue. check your plugs and wires maybethat could be it, with the black smoke.

Posted on Jan 22, 2009

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Best thing to do with a vehicle that you don't have any idea where the timing is supposed to be is something I discovered when I was a mobile mechanic. Loosen the distributor a little. Block the front tires and maybe even place the front bumper against something solid like a building. Put the truck in drive and hold the brakes down.Preferably have someone else do it while you are under the hood. slowly start raing engine speed. When it starts to stumble, move the distributor just a little one way or the other till it runs better. Once it does clears up, put a little more throttle to it. See if it keeps up. It may get to a point your back wheels will want to burn rubber. Once it does, let of the gas fast. If it dies, you have problems. Then you'll do what I said in the beginning and take it to your dealer to plug into it. Dealer, parts house, whatever. If it stay running good. You may have found the timing point. Good luck. If this is helpful, please post as such. If it is a know.TY

Posted on Jan 29, 2009

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