Question about 1998 Chevrolet S-10 Pickup

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WHY WILL MY TRUCK STUMBLE ON ACCELERATION

THIS ONLY HAPPENS WHEN THE TRUCK IS WARM AND IS INTERMITTENT.

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Why does it stumble during acceleration?


Start by ensuring routine maintenance is up to date. A stumble during acceleration could have several causes, one of which is worn or faulty spark plugs which should be taken care of during routine maintenance along with visual checks of wiring, connections and vacuum lines.

If this brings no results an obd scanner will have to be used to check for fault codes, live data and suchlike.

Dec 05, 2015 | 2007 Mitsubishi Lancer 1.3

1 Answer

1993 dodge dakota rough acceleration


It would be a good idea to take your Dodge to a competent mechanic to determine what's wrong and what needs to be done to fix it. Otherwise, you end up replacing parts needlessly.

Dec 22, 2013 | 1993 Dodge Dakota

3 Answers

P0121 generic throttle/pedal position sensor a circuit range/ performance


P0121 - Throttle Position Sensor/Switch A Circuit Range/Performance Problem

The Throttle position sensor is a potentiometer that measures the amount of throttle opening. As the throttle is opened, the reading (measured in volts) goes up. The powertrain control module (PCM) supplies a 5 Volt reference signal to the throttle position sensor (TPS) and usually a ground also. A general measurement is: at idle = .5 Volts; full throttle = 4.5 Volts. If the PCM detects that the throttle angle is greater or less than it should be for a specific RPM, it will set this code.

Potential Symptoms: Symptoms of a P0121 trouble code could include:
Malfunction Indicator Lamp (MIL) illumination (Check Engine Light or Service Engine Soon light)
Intermittent stumble on acceleration or deceleration
Blows black smoke on acceleration
No start

Causes: A code P0121 may mean that one or more of the following has happened:
TPS has intermittent open or short internally
Harness is rubbing and causing an open or short in the wiring
Bad connection at the TPS
Bad PCM (less likely)
Water or corrosion in connector or sensor

Possible Solutions:
1. If you have access to a scan tool, see what the idle and WOT (wide open throttle) readings are for the TPS. Check if they're close to the specifications mentioned above. If not, then replace the TPS and re-check.
2. Check for an intermittent open or short in the TPS signal. To do that, you can't use a scan tool. You'll need an oscilliscope. The reason is because scan tools take samplings of many different readings over just one or two data lines and can miss an intermittent drop out. Hook up your oscilliscope and watch the signal. It should sweep up and down smoothly with no drop outs or spikes.
3. If no problems were noticed, perform a wiggle test. Do this by wiggling the connector and harness while watching the pattern. Does it drop out? If so, replace TPS and re-check.
4. If you have no TPS signal, check for 5 Volt reference at the connector. If it's present, check the ground circuit for open or shorts.
5. Make sure the signal circuit isn't 12V. It should never have battery voltage. If it does, trace circuit for short to voltage and repair.
6. Look for any water in the connector and replace TPS as necessary.

Other TPS sensor and circuit related DTCs: P0120, P0122, P0123, P0124

May 01, 2011 | Volkswagen New Beetle Cars & Trucks

1 Answer

Hesitation in acceleration with no check engine light


MOST TIME CAR STUMBLE OR HESITATION ON ACCELERATION YOU.HAVE A SLIGHT LEAN FUEL MIXTURE.CAUSED BY STOPPED UP FUEL INJECTORS OR FUEL FILTER SLIGHTLY PLUGGED.

Jun 07, 2010 | 2001 Audi A4

1 Answer

1994 Silverado stumbles on acceleration when cold


Is the check engine light on? If it is, take the truck to an autoparts store and have them use a scan tool to retrieve the fault code(s) stored in the computer. I would suspect a faulty throttle position sensor or bad EGR valve, but the code(s) should narrow the problem down. Sure hope this helped.

Jul 20, 2009 | 1999 Chevrolet Silverado 1500

4 Answers

Missing and stumbling during acceleration


4.2 ltr missing. 2000 truck, f150. Changed plugs, wires. Ran great for 2 weeks. Started again. Changed coils. Got worse. Changed fuel filter, did nothing. Added injector cleaner and fuel cleaner, nothing. Checked EGR, o.k. It is getting worse. Had new gas about the time it all started.

Feb 07, 2009 | 2000 Ford F150 Flareside SuperCab

2 Answers

1992 jeep wrangler (4.0l , standard)- power loss after warm up.


disconnect exhaust ,muffler or cat may be stopped up

Jan 31, 2009 | 1999 Jeep Wrangler

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