Question about 1991 Ford Explorer

Open Question

1991 explorer 2wd. when accelerating there is a flat spot where the car will not accellerate past that point. if you let off the throttle slightly it will begin to accelerate again. no check engine warning light comes on. does not do this all the time

Posted by on

  • 1 more comment 
  • aaapd1 Sep 07, 2009

    Thank you for your clarification request. All good questions. It is not at full throttle. It is intermittent both in weather or not it is going to do it at all or the position of the throttle. If it does not happen in the first 10-15 min. of driving it is not going to do it. The temperature both ambient and engine does not seem to matter. The fuel level is usually always at least 1/2 tank or more near full in the tank.

  • aaapd1 Sep 07, 2009

    It is intermittent. If it does not occure in the first 10 minutes of driving it is probably not going to happen. The temperature does not matter both ambient and engine. The fuel tank is ususlly 1/2 to full. Sorry if this is a repeat reply.

  • Mike May 11, 2010

    This is FORD keeping you legal, , Based on your desciption, the further the pedal is pressed, you get nothing more? If this is intermittent, can you tell when it is going ot happen? What is the temprature at the time? When it happens, what is the weather in your area? How long from cold start up? How much fuel, does full or empty have any effect ?



Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

I have a Flat spot around 2000 - 2500 RPM. Does anyone else have this problem or know what it is?

like the first post ever here, that implies Im not in USA< bravo that?> what bravery.....
this is usa forum we dont have UTE's here, LOL. only SUV
that 3.2L was sold here on our Rodeo's too.
i think. if real Isuzu engine. and related.
2wd (RWD)

that engine in 2002 has EFI right,? some cars outside run carbs up to 2006, so..
i cant look in my books, as our cars are not your cars.

EFI flat shots have vast causes.
but here, are some.
  1. bad fuel.
  2. TPS bad, if the flat ends as you accelerate this can be it.
  3. if the flat spot, continues, low fuel pressure can be it.
  4. just needs a tuneup ,ever get on this decade?
  5. dirty MAF sensor if it has one. ours has no MAF,(air leaks if do will cause lean, and bogging if MAF system)
  6. clogged injectors. or leaking.
  7. scan it yet, for DTC errors. that be first.

try new spark plugs yet?//////????? gaped to spec, not guessing?

May 27, 2016 | Isuzu Cars & Trucks

1 Answer

How do i set the idle on my 1991 Honda Lx so it will pass emissions

should be a idle screw on the throttle body. right next to the accelerator cable. also make sure your cable isn't pulled tight keeping the accelerator opened slightly for a high idle

Oct 15, 2014 | 1991 Honda Accord

1 Answer

Flat spot after idle

sounds like a carby problem look down the carby and flick the throttle and you should see fuel squirting down the throat if not it is the accelerator pump in the carby

Apr 08, 2013 | 1991 Mazda 323

2 Answers

1991 cadillac deville fwd 4.9 engine shudders hard under slight acceleration. replaced plugs,wires,cap,rotor button,ignition module,egr valve, cleaned throttle body, still have same problem

I have a 1991 Cadillac Fleetwood 4.9 120000 miles, I have the same problem. replaced plugs,wires,cleaned throttle body, and O2 sensor and have same problem. Taking it to a GM shop on 02/24/10.

Feb 13, 2010 | 1991 Cadillac DeVille

1 Answer

Engine continues to rev when clutch is depressed to change gear,

Could be faulty cable, dirty throttle body, or a slight vacuum leak.

Jul 03, 2009 | 1997 Ford F150 Regular Cab

1 Answer

Flat spot on acceleration

The fuel injector nozzle is partially blocked.Add fuel additive to clean the injector nozzle

Jun 07, 2009 | 1992 Audi 80

1 Answer

Flat spot around 2000r/m

Try accelerating at different speeds, for example push pedal further down, or ease into it real slow & let it climb, and see if it still dies at 2000 rpm, just to see if pedal position makes any difference to see if maybe TP sensor has bad spot.

Mar 27, 2009 | 1991 Mazda 323

1 Answer

I have a 1991 fox that will start cold and idle all has a slight dead spot when you accelerate,but once you baby it past that point it seems to be fine.but once it warms up and i let it die,it wont...

Control pressure regulator bad or main line pressure relief valve stuck in fuel distributor.. Remove valve install new o-ring and purge bore with carb cleaner (don't get carb cleaner on new oring). If you have checked these things and it still starts hard hot....replace the accumalator back next to the fuel pump.

Feb 23, 2009 | 1996 Volkswagen Jetta

1 Answer

1987 Toyota supra turbo

it can be the TPS, throttle position sensor,bad or loose intake hoses, bad airflow meter or unplugged, clogged fuel filter.

Aug 05, 2008 | 1987 Toyota Supra

Not finding what you are looking for?
1991 Ford Explorer Logo

Related Topics:

37 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

79024 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers


Level 3 Expert

5676 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides