How to repair engine low power during acceleration

How to repair engine low power during acceleration

 

Model :Elantra (HD)

Year model: 2010

Fuel: Gasoline

Displacement: 2000cc

1) Condition(Auto repair And Study guide)

1. Engine low power during acceleration

2) Study Guide Cause

1. TPS (Throttle Position Sensor)

3) Auto repair and Study guide ,Diagnosis

1. Auto repair and Study guide Check with Scan tool

=Trouble code= P0507 Idle control system higher than expected

Possible cause

● A stuck or binding throttle plate
● Maladjustment of the accelerator cable
● Contact resistance in connectors
● Faulty ICA valve

 

4) Auto repair and Study guide

• Replace TPS due to damage pin.

 

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How to check fuel/system pressure too low

2006  D 2.9 TCI-J3  Engine  Engine Control  P0087 Fuel Rail/System Pressure - Too Low

Auto repair and Study guide Component Location

 

General Description

Auto repair nad Study guide At Commom rail diesel engine, rail pressure regulator is controlled based on rail pressure sensor signal in order to maintain optimum rail pressure according to current engine rpm and load.

however when a trouble, which leads rail pressure to out of target value intended by ECM, occurs due to mechanical or electronical reason, ECM shuts engine down and sets DTC by limiting fuel (stops injector operation) in order to prevent engine from being controlled abnormally. "rail pressure monitoring error" is the DTC which diagnose 1).supplying state of low pressure fuel and 2).mechanical operating conditions of high pressure pump and rail pressure regulator indirectly based on rail pressure sensor output voltage and rail pressure sensor duty. thus, repair relavant to this DTC requires mechanics the total understand of fuel system

DTC Description

When rail pressure is lower than target rail pressure, ECM tried to raise rail pressure as decreasing fuel press. regulator current(increasing fuel supplied to common rail). If meeting real fuel pressure to target pressure is failed to achieve, P0087 is set.

When this code is set, check possible causes which decrease fuel pressure such as 1)close stuck of fuel press. regulator, 2)lowered efficiency of high press. pump, 3)fuel leakage, 4)excessive returning quantity of fuel from injector, 5)clogged low press. pump filter.

 

DTC Detecting Condition

Auto repair and Study guide
Detecting Condition
Possible Cause

Threshold Value
● Rail pressure is below target value but FPRV correction quantity is above specified value.
● FPRV stuck
● High press.pump poor performance
● Fuel leakage
● Excessive fuel returning quantity at injector(Refer to "Component Inspection" of P0263 for checking process )
● Low press. fuel poor supply

Stuyd guide Fail Safe
● Engine turns OFF after time delay.
● Knock sensor signal is ignored(MDP learning inhibited)
Check lamp

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How to check CKP(Crankshaft Position Sensor) of Hyundai Terracan

How to check the CKP of Hyundai Terracan.

2006  D 2.9 TCI-J3  Engine  Engine Control  P0016 Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)

 

Auto repiar and Study Guide Component Location

 

Auto repair and Study guide General Description

※ Cam shaft position sensor

Auto repair and Study guide, Cam Shaft Position Sensor(CMPS) is hall sensor type. Sensing the teeth attatch at the end of exhaust cam shaft, CMPS detects rotation of Cam shaft (1 signal per 1 lotation)

As Cam shaft rotates once while Crank shaft does twice, CMPS referrence point generates once while CKPS do twice.Study guide

As this signal inputted to ECM, it distinguishes crank angle and the cylinder which requires fuel injection in order to determine injection sequence and duration.Study guide

※ Crank shaft position sensor

Auto repair Crank Shaft Position Sensor(CKPS) is magnetic inductive type. Mounted on transaxle hausing, it senses tone wheel position of fly wheel.

As tone wheel is devided with 58 teeth and 2 missing teeth (referrence point), 1 tooth corresponds to 6 degree.

CKPS which calculates RPM and crank angle is important to determine fuel injection quantity and injection timing with APS. Crank shaft position is closely related to engine starting,Study guide.

Auto repair and Study guide DTC Description

P0016 is set when timing system error occurs. This code is due to 1) incorrect correlation between CKP reference point and CMP reference point, 2) The failure of reference point synchronization because of abnormal output signal from CKP or CMP 

DTC Detecting Condition

Detecting Contion
● Failure occurs at cranking : fuel injection stops(engine ON is impossible)
● Failure occurs at engine running : using cylinder data before failure happens. Engine running is possible only untill engine OFF.
Check lamp

Auto repair and Study guide Possible Cause
● CKPS and CMPS reference points not synchronized properly
● Poor timing belt arrangement
● CKPS circuit
● CKPS component
● CMPS circuit
● CMPS component
● Too wide air gap

 

Auto repair and Study guide Signal Waveform

※ CMPS Signal Waveform Analysis

1.ECM recognizes HIGH signal as LOW signal when CMPS signal drops below 2.0V and LOW signal as HIGH signal when CMPS signal rises above 3.8V.Study guide.

2.V0 - the Minimum voltage of LOW signal does not drop below 0.0V due to the hall sensor inside resistance. When the Minimum voltage of LOW signal is above 0.6V during signal waveform inspection, check excessive resistance inside of CMPS component or in ground circuit.Study guide.

※ CKPS Signal Waveform Analysis

1.The output voltage of CKPS signal varies according to rpm(the speed of tone wheel passing by sensor)

(low voltage is inducted for low speed and high voltage is inducted for high speed.)

2.Auto repair and Study guide, CKPS should detect from low rpm at cranking to above 5000rpm. If minimum detecting voltage is set low for the ease of signal detection at low rpm, 1) the abnormal signal at high rpm from which high voltage generates or 2) electrical NOise through circuit can be recognized as Crank signal. Thus minimum detecting voltages at low rpm and high rpm are set differently.

3Auto repair .ECM convert analog signal like the waveform illustrated above into digital signal with A/D converter.The voltage above minimum detecting voltage of crank signal and "-"voltage below 0.0V is meaningless at converting process. RPM is detected as Hz.(signal detecting period)

 

Study guide Monitor Scantool Data

1.Connect Scantool to Data Link Connector (DLC).

2.Warm engine up to normal operating temperature.

3.Turn "OFF" electrical devices and A/C.

4.Monitor "ENGINE SPEED" parameter on the Scantool.

A.Specification : 800±50RPM at idle

 

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How to inspect turbo charger

How to inspect turbo charger of Hyundai terracan

2004  D 2.5 TCI  Turbo Charger

INSPECTION Auto repair and Study guide

1. Check the inner housing contacting turbine wheel for crack, pitching and other damages caused by overheat.

2. Make sure that the waste gate valve lever operates freely by hands.

3. Make sure there are no damages on the inner housing surface contacting compressor wheel.

4. Turbine wheel and shaft assemblies with cracks in the blades or broken blades can not be used again. If the blades are slightly bent, it can be usedagain but severely bent blades can not be reused.

5. Check if there are foreign materials disturbing the oil flow in the oil passage of cartridge assembly.

WASTE GATE INSPECTION (Auto repair and Study guide

1. Check the waste gate rod operation under the pressure below.

Nominal Value : 77.5 kPa (0.79 kgf / cm²)

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How to repair engine noise from Hyundai Terracan

How to repair engine noise from Hyundai Terracan

 

Auto repair and Study guide.

Give’s you Some of my actual experience on field Auto repair and Study guide as Trouble shooter.you can leave your comment or you are free to leave Question regarding on your own car if there is a problem.

 

Study guide Model: Hyundai Terracan(HP).

Study guide and Year Model:2004

Fuel: Diesel

Auto repair Displacement:2500cc

Auto repair and Study guide Subject: Abnormal engine noise – Turbo charger

 

1) Condition

1. When the engine is cold abnormal noise occur.

2) Cause

• Malfunction in turbo charger.

3) Diagnosis

1. The noise is similar to the front exhaust pipe noise.
2. The noise occurs from the turbo charger.
3. Remove the turbo charger from the engine.
4.  Metal clips in the turbo charger are found.
5. The piece of parts from the turbo charger assembly is out of order.

   2004  D 2.5 TCI  Turbo Charger

   COMPONENTS

   

4) Repair Guide

1. Replace the turbo charger.
2. Auto repair , Study guide , Auto repair , Study guide , Auto repair , ,Study guide

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How to check the power window main switch

How to check the power window switch of Hyundai car

Model :Elantra (HD)

Year Model:2009

Fuel:Gasoline

Displacement: 1600cc and 2000cc

How to check the power window switch,This Auto repair and Study guide  giving you a extra knowledge on checking main switch of power window of Hyundai.

2009  G 1.6 DOHC  Body Electrical System

AUTO REPAIR AND STUDYU GUIDE INSPECTION

POWER WINDOW MAIN SWITCH INSPECTION( Auto repair and Study guide)

1.Disconnect the negative (-) battery terminal.as Study guide and Auto repair

2.Remove the front door trim. (Refer to the Body group - front door)

3.Disconnect the 16P connector from the switch.

[LHD]

[RHD]

4.Auto repair and Study guide Check for continuity between the terminals in each switch position according to the table. If the continuity condition is not normal, replace the switch.

AUTO REPAIR AND STUDY GUIDE ASSIST POWER WINDOW SWITCH INSPECTION

1.Disconnect the negative (-) battery terminal.

2.Remove the front door trim. (Refer to the Body group - front door)

3.Disconnect the 10P connector from the switch.

4.Check for continuity between the terminals in each switch position according to the table. If the continuity condition is not normal, replace the switch.

REAR POWER WINDOW SWITCH INSPECTION

1.Disconnect the negative (-) battery terminal.

2.Remove the rear door trim. (Refer to the Body group - rear door)

3.Disconnect the 8P connector from the switch.

4.As Study guide Check for continuity between the terminals in each switch position according to the table. If the continuity condition is not normal, replace the switch.(Auto repair)

 

Auto repair , Study guide , Auto repair , Study guide , Auto repair , Study guide.

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How does starting system of Hyundai Coupe works

 

Engine Electrical System

Auto repair and Study guide Description

The starting system Study guide includes the battery, starter, solenoid switch, ignition switch, inhibitor switch (A/T), ignition lock switch, connection wires and the battery cable in Auto repair.

When the ignition key is turned to the start position, current flows and energizes the starter motor's solenoid coil.

The solenoid plunger and clutch shift lever are activated, and the clutch pinion engages the ring gear.

The contacts close and the starter motor cranks. In order to prevent damage caused by excessive rotation of the starter armature when the engine starts, the clutch pinion gear overruns.Auto repair.

1. Solencid
2. Brush
3. Armature
4. Overrum clutch

 

2010 > G 3.8 DOHC > Engine Electrical System

Troubleshooting Starter Circuit

 

This Study guide The battery must be in good condition and fully charged.

1.Disconnect the fuel pump connector.as Study guide.

2.With the shift lever in N or P (A/T) or clutch pedal pressed (M/T), turn the ignition switch to "START"

If the starter normally cranks the engine, starting system is OK. If the starter will not crank the engine at all, go to next step.

If it won't disengage from the ring gear when you release key, check for the following until you find the cause.

A.Solenoid plunger and switch malfunction.

B.Dirty pinion gear or damaged overrunning clutch.

3.Auto repair and Study guide ,Check the battery condition. Check electrical connections at the battery, battery negative cable connected to the body, engine ground cables, and the starter for looseness and corrosion. Then try starting the engine again.

If the starter cranks normally the engine, repairing the loose connection repaired the problem. The starting system is now OK.

If the starter still does not crank the engine, go to next step.

4.Disconnect the connector from the S-terminal of solenoid. Connect a jumper wire from the B-terminal of solenoid to the S-terminal of solenoid.

If the starter cranks the engine, go to next step.

If the starter still does not crank the engine, remove the starter, and repair or replace as necessary.

5.Check the following items in the order listed until you find the open circuit.

A.Check the wire and connectors between the driver's under-dash fuse/relay box and the ignition switch, and between the driver's under-dash fuse/relay box and the starter.

B.Check the ignition switch (Refer to ignition system in BE Group).

C.Check the transaxle range switch connector or ignition lock switch connector.

D.Inspect the starter relay.

Auto repair Starter Solenoid Test

1.Disconnect the field coil wire from the M-terminal of solenoid switch.

2.This Study guide ,Connect the battery as shown. If the starter pinion pops out, it is working properly. To avoid damaging the starter, do not leave the battery connected for more than 10 seconds.

3.Disconnect the battery from the M terminal.

If the pinion does not retract, the hold-in coil is working properly. To avoid damaging the starter, do not leave the battery connected for more than 10 seconds.

4.Disconnect the battery also from the body. If the pinion retracts immediately, it is working properly. To avoid damaging the starter, do not leave the battery connected for more than 10 seconds.

Free Running Test

1.Place the starter motor in a vise equipped with soft jaws and connect a fully-charged 12-volt battery

to starter motor as follows.

2.Connect a test ammeter (100-ampere scale) and carbon pile rheostats as shown in the illustration.

3.Connect a voltmeter (15-volt scale) across starter motor.

4.Rotate carbon pile to the off position, Auto repair.

5.Connect the battery cable from battery's negative post to the starter motor body.

6.Adjust until battery voltage shown on the voltmeter reads 11.5volts as Study guide.

7.As Auto repair and Study guide , Confirm that the maximum amperage is within the …….

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