Question about Ford F-250

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97 ford f250 7.3 power stroke diesel. Lopes and shakes when started then settles down. Does it also when warmed up.

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  • Anonymous Mar 27, 2014

    Ford F250 diesel power stroke has lost power 2 times and than won't start, Once truck has sat idol over night it seems to start but is sluggish on the start. Current mileage 76K



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They had problems with the injector pumps also recomend changing the fuel filter probley picked up water from fuel

Posted on Aug 03, 2008


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Diesel. Reduce power lite turned on. Shut off engine and started back up - lite is off. Can it be driven?

Jerry, Drive to a good shop. So many things can cause reduced power light unfortunately. The first step would be to get the truck hooked up to a scanner/computer and have the computer scanned for trouble codes. One thing that you could try is to drain the water from the water separator that is mounted on the frame under drivers front door. If the PCM picks up on water, power is reduced until water is removed/drained. It could be an exhaust sensor that is reading faulty. Unfortunately from here its impossible to tell you exactly what the fault is because there are just so many engine sensor inputs that could cause your problem. Check the attached links, forums,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."

Reduced Engine Power Light Wrench Showing Ford Powerstroke Diesel Forum

08 Reduced Engine Power

Regen Reduced Engine Power Light Ford Truck Enthusiasts Forums

Help reduced engine power light comes on

Dec 29, 2015 | 2008 Ford F-250 Super Duty

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2001 ford taurus,lopes when first started,when cold.

intake manifoold leak check all vacuum lines replace all vacuum lines if look cracked ,spark plugs could be fouled out by leaking fuel injectors, clean fuel injectors,replace fuel filter,replace air filter,replace spark plugs and wires,do tune up see if it helps if not.could have leaking intake manifold gasket or leaking egr valve,use engine vacuum gauge check engine vacuum for intake manifold gasket leaks.

Sep 23, 2012 | Ford Cars & Trucks

1 Answer

Engine lopes at stedy rpms almost cutting out, 97 t bird 3.8

im having the same problem w my 97 bird... lopey or rough idle. no luck yet changed or tested many sensors already... if you have any tips let me know and ill do the same, Thanks

Jun 16, 2010 | 1997 Ford Thunderbird LX

2 Answers

Problems With Cold Starts.

I know for some models that Ford had another Diesel timer for the glowplugs for severe weather. This timer was meant to keep the glowplugs on longer.

I had an 87 Ford Diesel and the top wires on the timer were tight and clean. For some reason when I loosened them and retightened the wires the timer worked better.

Many truckers use a Diesel additive and usually the fuelstops have modified Diesel for cold climates. I understand there is a Cetane rating for Diesel and Premium Diesel may help.

Feb 26, 2010 | 2008 Ford F 250 Super Duty 4WD

1 Answer

Need some one help........... I have terrano 1999 manual transmision, problem is rpm unbalance when engine strat rpm between 700 - 900 rpm ac off

The ideal idle rev rate for your vehicle should be approx 800 rpm. If the engine is surging in revs and then dropping off shortly after starting from cold, then it may be that your engine is trying to compensate for the fact that your thermostat has not yet opened. It would help to know if the engine revs settle down after the thermostat opens. Diesels do not have spark plugs, they have glow plugs that preheat the air within the piston chamber so that first starts will occur without a huge drain on the battery, this means that the engine relys on the compression of the diesel and air mixture going into the piston chamber to reach maximum compression and then explode thus causing the power stroke within your engine. But when an engine is cold the engine has trouble sometimes reaching that explosive temperature within the chamber and sometimes not all of the power is released with each stroke of the engine. When the temperature rises and the the thermostat opens the engine can reach the explosive temperature more efficiently and the revs settle down to a more even rate.

Check to see if your air is getting through the turbo alright, sometimes a simple thing like a blocked airfilter can cause symtoms such as what you describe, failing that I would get your Diesel pump checked out, that may have a slight blockage. As an afterthought, have you checked your diesel filter(s) and fuel lines, they may need cleaning out as well. That may cause the rough running until the diesel warms up and flows better through the fuel lines.

Hope that helps.

Jan 29, 2010 | 1999 Nissan Pathfinder

2 Answers

Diesel leak on a 7.3L Power Stroke

you o-rings for you drain valv are leacing the yellow valve on side of fuel filter replace and you will be good ford sells o-ring kit

Oct 10, 2009 | 1999 Ford F350 Regular Cab

1 Answer

Cold starts ok warms up shakes and stalls

check engine coolant temperature when it gets warmer, or at operating temperature, and verify that the temperature gauge is showing warmed up to operating temperature. If the coolant temperature sensor tells the computer the engine is cold it will over fuel and miss and the engine will die. When cooled down it will run fine until it warms up. Also could be coil if it starts missing after warmed up.

Aug 18, 2009 | 1990 Ford Bronco II

3 Answers

Starts when cold, won't start once it's warmed up.

take it to a diesel injection shop. the high end oil pump is out in the injection pump.

Mar 10, 2009 | 1995 Ford F250

1 Answer

I have a 97 tracker that lopes at idle bad any ideas what it is

Could be a vacume leak. Need a vacume gauge. Hook up to a vacume port should be around 17-20 inch pounds of mercury (steady). If not this check your emissions system

Feb 18, 2009 | 1991 Geo Tracker

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