Question about 1993 Jeep Grand Cherokee

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Hard starting,runs very rough,kicks and bucks even after fuel

Additives have been added

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  • Mike Butler
    Mike Butler May 11, 2010

    Any trouble codes?

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  • Contributor
  • 27 Answers

Replace the fuel pump. $300-500.

Posted on Dec 30, 2008

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1998 Dodge 1500 5.9L, running rough, no power, does not do this all the time..


I had a similar problem on a 2004 Jeep Grand Cherokee V8 engine.
Nothing seemed out of the ordinary except that occasionally the engine would run rough. Another seemingly unrelated symptom was that when shifting out of Park the transmission would sometimes jolt.

Turns out that I had a bearing on the serpentine belt tensioner that was freezing up. My belt broke and while I was changing the belt the pully on the tensioner fell into my hand. The bearing had seized and the plastic hub had disintegrated. After getting the new tensioner and belt. I noticed that the rough engine and the hard shifting transmission problems have gone away.

Seems that the engine was having to work harder to overcome the bad bearing.


Another cause of rough engines comes from dirty fuel injectors. The best solution I have run across is Chevron's Techron fuel additive. I had a honda Prelude that had a rough running engine. The Honda technician advised me to start adding Techron when I fill up. Worked like a charm. After the second tank I had no more problems. I have tried other fuel additives over the years, but Techron seems to be the best.

Also be sure to change your fuel filter. A dirty fuel filter will cause a noticeable drop in power.





Mar 03, 2014 | 1998 Dodge Ram

1 Answer

I added fuel additive to my fuel had timing chain done 2 days ago now It won't idle it dies and runs real rough at high RPM's. If you put it into drive gear kills motor.


Sounds like a spark plug or wire issue. Anytime the vehicle starts to skip, die, or (run rough) its usually these minor things. However if that does not help, start looking into your fuel system. Always try cheapest first. Plugs and Wires....Good luck...

Jun 07, 2013 | Cars & Trucks

1 Answer

2004 F-150 water in gas tank. Replaced fuel filter twice and added additives to the gas. Check engine light still and still runs rough when idling and will stop running at times; however it starts...


you might have to clean the tank because the pump might have problems as well the injectors could be clogged or it wasnt only water in gas if you are sure no sugar was added in tank i would check the fuel pump just the same if it is easy to remove

Dec 31, 2010 | 2004 Ford F150

1 Answer

On light acceleration it starts to run rough until i give it more gas. 2006 toyota corolla ce auto trans


could be your intake, fuel pump, or it just may need some fuel additive just read the instructions

cheapest at top
additive
intake(spray carb cleaner in it while the car is running, and replace the air filter)
fuel pump can be costly unless you do it your self (not to hard)

Jun 02, 2010 | 2006 Toyota Corolla

1 Answer

Engine runs rough at idle and bucks at highway speed. Check engine light was on after fuel injector cleaner was added to gas, the chek engine light ent off.Scan tool indicated no. 1 cylinder misfire prior...


I had a similar problem in a 1994 Taurus, and after spending nearly 300$ on ignition parts, it turns out the problem was a bad spark plug wire that cost me 8.88$ to replace.

Mar 01, 2010 | 2001 Ford Taurus

1 Answer

Rough Engine When it is Cold


Sounds like the intake gaskets are sucking air when cold. When it warms up then they expand and take up the space and no longer **** air. You can test the theory by spraying a little water on the intake while it's running if it starts missing even more then that is most likly the problem. It's not a hard job to do, but if you do not have wobble sockets then it will be a little more diffacult.

But if they want 600 bucks to do plugs and wires then you need to find another shop to work on your tahoe! That's alot of money for something that only takes a few minutes to do, and the parts shouldn't be much more than 150-200 on the high side!

Oct 30, 2009 | 2002 Chevrolet Tahoe

2 Answers

Ihave problem with 92 gmc safari it drives sometimes during driving car buck like it.s out of gas . I'll turn igntion on and off real quick. and car drives ok. Ihave replaced fuel pump.


sounds like a bad plug wire, take a squirt bottle while the car is running then spray the wires down they should start arcing, also when you replaced the fuel pump did you replace the fuel filter

Apr 29, 2009 | 1992 GMC Safari

1 Answer

Truck runs rough


Sounds like one of your chambers isn't firing. Run your car for a few minutes, shut it off then pull your plugs one at a time and see if one of them is wet. Might just need a new plug.

Nov 28, 2008 | 1990 Ford F150

2 Answers

1994 Safari


have the computer checked or inspect fuel injecters if all else fails fuel pump weak.

Oct 03, 2008 | 1994 GMC Safari

2 Answers

1988 GMC w/ fuel injectio


My 1988 GMC jimmy with V-8 and automatic transmission w/ over drive would buck and **** at low speeds. The problem was identified by a FixYa guy as a transmission problem and suggested I try adding a Lucas product transmission additive at about $4. I did that and I am amazed that the old truck runs smooth, even idles better and does not stall when I go to reverse.

Aug 29, 2008 | 1995 GMC Jimmy

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