Question about 1998 Isuzu Rodeo

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Engine has flat spot while accelerating/cruising

My car feels like it is falling on its face when i try to accelerate at part throttle. it will also do it when i am at a cruising speed. it will clear up if i go full throttle spitting and sputtering a little. it has completely shut off a couple of times. i have done a complete tuneup recently but that has not helped. had a bad alternator last year and replaced both alternator and battery

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  • rodeoowner Dec 11, 2008

    I am having the same problem, only now, once it starts, it won't stay running unless I constantly give it gas.

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6 Suggested Answers

eitan
  • 291 Answers

SOURCE: engine spits and sputters

check your spark plug wires.

Posted on May 15, 2008


  • 20 Answers

SOURCE: Van Sputters And Loses All Power When I Accelerate

Internal combustion engines requires 3 things... fuel, air, and spark. You do not have enough of one or more of these. If the wires and plugs are old, change them.  Air filter, same thing.  Fuel filter can also clog up with stuff after awhile. When you take a look at the air filter check where the air comes from.  It is possible a little critter has built a home and blocked the air flow (rare, but, it has happened).

Posted on May 10, 2009

  • 99 Answers

SOURCE: My 2003 Ford Focus ZX5 check engine light came on.

Have you hooked this up to an OBD11 reader yet ?
May be a bad crank, cam or knock sensor. Cars today are loaded with sensors.
If you don't read the codes you will be chasing the rabbit down the hole. ;-)
Hope this helps
Sam

Posted on May 11, 2009

Bob Gemmell
  • 209 Answers

SOURCE: No power, no acceleration, spits & sputters

If this is a diesel replace the fuel filter

Posted on May 29, 2009

pippall
  • 1486 Answers

SOURCE: Flat spot on acceleration

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

Posted on Jun 07, 2009

  • 1 Answer

SOURCE: Chevy truck sputters/hesitates when I press the throttle

My First thought is fuel injectors pull off your air intake and airfilter cover spacer. start your engine look at the injectors you should see i steady stream of fuel spraying in. if you don't replace your fuel filter, injectors. If you can try to make sure your fuel lines isnt clogged.

Posted on Apr 21, 2010

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1 Answer

When I use the cruise control, it works beautifully up to about 60kph. If I try to set it at any faster speed it wants to pull it back to 60...is there a factory reset or something?Thanks Jeremy


Search Results

    Fixing Faulty Cruise Control - Popular Mechanics

    www.popularmechanics.com/cars/how-to/a116/1272586/
    Just as you uncurl your feet and try to accelerate back to traffic speeds, the vehicle ...vacuum left to pull in the servo after sustained near-wide-open-throttle. ... are designed not to remember their set speed if the vehicle speed falls below 25 mph ... If one of the brake lights has failed, the cruise control thinks the brakes are on ...

Jan 27, 2016 | Cars & Trucks

1 Answer

Where is the fuse for cruise control on a 2003 envoy


It is HVAC 1fuse #39 in the rear fuse block ,this powers the on/off switch for cruise control ! Fuse Block - Rear Beneath the left rear seat. What engine does it have ? 4.2 L or 5.3 l There is no vacuum involved in the operation of the cruise control ! Your vehicle has electronic throttle control .
Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions at vehicle speeds above 40 km/h (25 mph). Steep grades may cause variations in the selected vehicle speeds.
The following are the main components of the Cruise Control System:
?€¢
The powertrain control module (PCM)


?€¢
The On/Off switch


?€¢
The Resume/Accel switch


?€¢
The Set/Coast switch


?€¢
The TCC brake switch


?€¢
The stop lamp switch


?€¢
The throttle actuator control (TAC) motor


?€¢
The vehicle speed sensor


Cruise Control Engaged
The cruise control system will engage and adjust the vehicle speed based on the activation of the following cruise control switches:
?€¢
On/Off


?€¢
Resume/Accel.


?€¢
Set/Coast

The cruise control switches are located on the multifunction/turn signal lever.
The powertrain control module (PCM) monitors the signal circuits of the cruise control switches in order to determine when to capture and maintain the selected vehicle speed. The PCM uses the throttle actuator control (TAC) module motor in order to control the vehicle speed. For further information on the TAC System, refer to Throttle Actuator Control (TAC) System Description in Engine Controls - 4.2 L.
Ignition positive voltage is supplied from the 10 ampere HVAC 1 fuse to the cruise control switch via the ignition 3 voltage circuit. When the normally open cruise control On/Off switch is turned On, the switch closes and the PCM detects a high signal voltage on the cruise control on switch signal circuit. When the normally open Set/Coast switch is pressed, the switch closes and the PCM detects a high signal voltage on the cruise control set/coast switch signal circuit. To engage the cruise control system, turn the On/Off switch On and momentarily press the Set/Coast switch. The PCM will confirm that the cruise control enable criteria has been achieved. The PCM will engage the cruise control system and record the selected vehicle speed. The PCM sends a class 2 message to the instrument panel cluster in order to illuminate the cruise control indicator. Pressing the accelerator pedal, while the cruise control system is engaged, will allow the driver to override the cruise control system in order to accelerate the vehicle beyond the current set vehicle speed. When the accelerator pedal is released, the vehicle will decelerate and resume the current set vehicle speed. The driver can also override the current set vehicle speed via the Set/Coast switch and the Resume/Accel switch. When the cruise control system is engaged, pressing and holding the Set/Coast switch will allow the vehicle to decelerate from the current set vehicle speed without deactivating the cruise control system. When the Set/Coast switch is released, the PCM will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed. When the cruise control system is engaged, momentarily pressing the Set/Coast switch will allow the vehicle to decelerate at 1.6 km/h (1 mph) increments for each time that the Set/Coast is momentarily pressed, with a minimum vehicle speed of 37 km/h (23 mph). When the normally open Resume/Accel switch is activated, the switch closes and the PCM detects a high signal voltage on the cruise control resume/accel switch signal circuit. Activating and holding the Resume/Accel switch, when the cruise control system is engaged, will allow the vehicle to accelerate to a greater vehicle speed than the current set vehicle speed. When the Resume/Accel switch is released, the PCM will record the vehicle speed and maintain the vehicle speed as the new set vehicle speed. When the cruise control system is engaged, momentarily activating the Resume/Accel switch will allow the vehicle to accelerate at 1.6 km/h (1 mph) increments for each time that the Resume/Accel switch is momentarily activated, with the maximum acceleration total of 16 km/h (10 mph) over the current set vehicle speed . Momentarily activating the Resume/Accel switch, after the cruise control system has been disengaged by pressing the brake pedal, will recall the previous set vehicle speed that is recorded in the PCM.

Sep 11, 2015 | Cars & Trucks

1 Answer

Car has high idle when EGR Comanded open. iS AN ethrottle system. E throttle is comanded open 15% at same time. Happens randomly.


The EGR will open when you are cruising over 40 m.p.h., the vehicle is at full operating temperature, and you are not accelerating. The EGR should close when vacuum condition is low (as when you are accelerating), or when your speed falls below the preset (usually around 40 m.p.h.).
If your EGR and E-throttle are open at the same time, suspect a bad EGR position sensor, a bad EGR mounting gasket, or a sticky EGR valve.

May 20, 2015 | Toyota Opa Cars & Trucks

1 Answer

Ford focus cruise control


Once you have turned your cruise control on accelerate to desired speed press SET button on right hand side of steering wheel before lifting foot from accelerator, then remove foot from accelerator. pushing RESUME button will deactivate cruise control without turning it off. Then when clear of traffic push resume again to activate cruise control. It will automatically resume to previous set speed.

Apr 30, 2013 | 2006 Ford Focus

1 Answer

94 Toyota Camry idles but wont accelerate


Make sure the cable from the pedal to the throttle is good and hook up
to the throttle. When you press the pedal it should pull the throttle to open.

Mai lor

Feb 22, 2013 | 1994 Toyota Camry

1 Answer

Honda Civic 1.5 Vtec Randomly Accelerates When Cruising


Try contacting the Dealer. There was a big investigation about some Hondas suddenly accelerating. Here in the U.S., there were Lawsuits and deaths from sudden acceleration.

Check out the site, I believe, Allaboutautomobiles.com, which has the National Hoghway Traffic Administration info about each car and defects. This site has Recall #s and Consumer complaints listeded.

I hope my solution is useful.

May 30, 2012 | Cars & Trucks

1 Answer

2007 JGC 5.7 Hemi hesitates to accelerate when the vehicle is at cruising speeds above 35mph. When it is at a constatnt speed and the throttle is at a fixed position it feels a bit jerky as well.


I suspect TPS (Throttle Positioning Switch) they're basically a rheostat that controls throttle movement. After a while, spots that get most used develop "Hot Spots" - and will cause a surge or hesitation when at that location. Replace TPS.

Mar 27, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Hi. I'm working on an '02 impala,3.8L.It has 4 dtc's; P0134B, P01106C, P01107C, and P0102B.the car idles smoothly,though a little fast,I think.when you try to accelerate,it hesitates, stumbles, and falls...


Sounds to be a faulty TPS sensor (Throttle position sensor ).02 sensor (Oxygen Sensor will have kinda same affect but not as bad...>>>Hope this helps.................metalpoet

Mar 03, 2011 | 2001 Chevrolet Impala

1 Answer

Cruise control went out on my 2005 ford taurus and my accelerator gets stuck at times. Should I replace the cruise control?


This is a dangerous defect. What you want to do is isolate the Cruise cable from the Throttle mechanism. Then get the Cruise cable away from the Throttle so it can not jam the Throttle accidentally.

With the engine OFF use your hand and move the remaining Throttle mechanism and feel for sticking or roughness in the control. If you feel binding, start removing the connection of the Throttle cable and work your way through all the moving parts like a Butterfly flap on the Airhorn, the TPS (throttle position sensor) and so on until you find out what is rubbing.

It is possible that the Cruise was disengaging because the Throttle parts were binding. If disconnecting the Cruise eliminates the sticking throttle, then all the problems came from the Cruise control cable or the Cruise Box. Once you have made a thorough check of the Throttle you can blame the Cruise for your problems and replace the parts.

Jun 21, 2010 | 2005 Ford Taurus

1 Answer

Engine stalls when acceleration


sounds like poss throttle pos sensor prob./ could also be problem w/fuel pump not pumping enough fuel at high speed. poss fuel filter clogging also. have someone check pump pressure.

Nov 11, 2008 | 2004 GMC Envoy

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