Okay my 96 death trap Accent has been stuttering on acceleration for about 3 weeks. I've had the car for about 6 weeks. From idle, if you punch it it stutters then revs up, same coming off a light. its only at low rpms off idle then it picks up and has no problems. I just changed the fuel filter and it didn't change. Plugs look good, kinda white but not at all melted or any crap on them, totally clean, but look fairly new. No check engine light.
Any ideas? I forgot I know nothing about gassers until I pulled the plugs and had NO idea what i was looking for and had to look it up.

 

does it have air sensors in the intake? if so make sure they are clean. replace the spark plugs. its cheap and a definate way to knock a possible problem out.

 

Intake leak , EGR leak , faulty egr valve.
The white color on the plug (or a cream off color) can indicate a lean condition or a normal plug, Use some brake cleaner or propane around your intake manifold, your idle will change when you find the leak! Make sure your coil and plug wires are on good....might make for a nice little fire if you dont!

 

I'll try the propane thing. Define sensors? Its got a MAF and what I'm guessing is an IAT sensor on the airbox. Its looking an aweful like its had this problem before and the PO managed to mask it when he sold it. I got a steal on the car so I can't bitch, but I have to feather the hell out of the clutch to get off the line fast when i need to.

 

maybe the crank position sensor.

 

clean the sensors and do a tune up. new plugs and wires and then we will see how it goes

 

Okay I cleaned the MAF with MAF cleaner (smells like brake cleaner )
Ima resistance test the wires later and I'm sure the plugs are new, changed within a week before I got the car. The inside of the maf housing was hella nasty, so maybe this will make a difference.
I have no idea what I'm doing so I'm pretty much doing it by the book.

 

Date
MARCH, 2000

Subject
THROTTLE POSITION SENSOR (TPS)
DRIVEABILITY SYMPTOMS

Model
1996-1999 ACCENT
1996-2000 ELANTRA
1997-2000 TIBURON

DESCRIPTION:

The Throttle Position Sensor (TPS) output signal is an important input for both the Engine and Transaxle Control Modules. A malfunctioning TPS may result in the following symptoms:

^ Unstable idle

^ Uneven throttle response

^ Slip & shock during the 1-2 & 2-3 shift on Automatic Transaxle (ATM) equipped vehicles.

^ Erratic ATM shifts with possible shift flare (engine RPM increase during shifts)

^ Check engine light is ON (light may go off, but the code will remain stored)

^ TPS related code stored in the ECM and/or TCM


REPAIR INFORMATION:







1. If the following three conditions are met:

^ The Throttle Position Sensor (TPS) is suspected

^ The ECM / TCM has no codes stored

^ The Throttle Position Sensor (TPS) has the words "DAE SUNG" molded on the part



Then conduct the following diagnostic procedure:

^ The vehicle must be idling (with all accessories turned off)

^ Push on the side of the TPS connector, towards the dash panel. The force used should be firm enough to slightly deflect the TPS housing, but not enough to damage or break anything.

^ If the TPS is not operating properly, the engine will surge in response to your push.

^ If the Hi-Scan Pro or HDS is used to record the TPS output, the above procedure will show that the TPS output increases toward 5V when the connector is pushed.

2. If the ECM has a TPS related code stored (with or without the MIL on), replace the TPS.

 

wait til tonight and go out and disconect the under hood light and start the car and look for a lightning show under the hood, this will show you if the plug wire are arcing across the each other or to the engine

 

Date: MAY 1996

Model: 93-95 SCOUPE, 96 ELANTRA, 95-96 ACCENT

Subject
THROTTLE POSITION AND MASS AIR FLOW
SENSOR TROUBLESHOOTING

SERVICE INFORMATION:

^ The Throttle Position Sensor (TPS) signal indicates the angle of the throttle plate. The output voltage of the TPS is directly proportional to the angle of the throttle plate.

^ The Mass Air Flow (MAF) sensor measures the mass flow rate of the air entering the engine. The output voltage of the MAF sensor is directly proportional to the mass flow rate of the air entering the engine.


The output voltages from these sensors are used by the Engine Control Module (ECM) in conjunction with other sensor signals to calculate engine load. These signals are critical in determining fuel injection pulse width and ignition timing.

CONDITION:

The customer may experience one or more of the following conditions:

^ Poor idle quality

^ Cyclic fluctuating idle

^ Poor driveability (surging, hesitation, etc.)


DIAGNOSIS:

When diagnosing the driveability conditions listed above, the stability of the TPS and MAF signals should be verified. At idle and steady cruise, the TPS and MAF signals should be steady voltages. If a fluctuating signal is observed, the connection at the related sensor should be verified. Plots using HDS are shown to illustrate normal TPS and MAF signals at idle. A third plot illustrates an erratic TPS signal at idle taken from a vehicle with a poor contact at the sensor connection. See following plot illustrations.

SERVICE PROCEDURE:

1. Turn the ignition key to the OFF position and remove the key.

2. Disconnect the sensor believed to contribute to the condition. Refer to the appropriate shop manual for the location and connector removal procedure.

3. Inspect the connector socket and pins for contamination and proper alignment.

4. Clean the connector ends with electrical contact cleaner.

5. Reconnect the connector.

6. Start the engine and verify the signal stability using a voltmeter or HDS.