How to check fuel smell occurs inside the car.

How to check fuel smell occurs inside the car at the same time engine hesitation and rough idling in hot condition.
Model : Hyundai Azera (TG)
Year Model: 2008
Fuel : Gasoline
Displacement: 3300cc
Subject: Fuel smell occurs inside the car and engine hesitation and rough idling in hot condition.
1) Condition

1. Fuel smell occurs inside the car during hot condition.
2. Engine hesitation occurs when acceleration in hot condition.

 2) Cause

1. Due to purge control solenoid valve malfunctioning.

3) Diagnosis

1. Scan tool check = fail safe throttle body & oxygen sensor.
2. Check current data for purge control solenoid valve= Not working
3. Manually check if the purge valve is working or not.
   = hold the purge and accelerate, you can feel if its working.

4) Repair Guides

• Replace purge control valve
• More study

How To Check The Engine Poor Power On Acceleration?

This Case is Different with some trouble that i encounter but is not new for me,i was encounter before.

How To Check The Engine No Power On Acceleration?

Model : Hyundai Sonata (NF)

Year Model: 2006

T/A :All

Fuel : Gasoline

Displacement: 2400cc

1) Condition:

1. Engine poor power on acceleration.
2. Engine hesitate on acceleration on idling and even on driving.

2) Cause :

1. Clogged Air filter.
2. Clogged Exhaust manifold.

3) Diagnosis:

1. Scan tool Check.
   = Trouble Found by GDS is Oxygen sensor.
2. Check the current data for oxygen sensor abnormal.
3. Check for the wiring connection from ECU = Good
4. Pull out Oxygen replace with good condition. at the same time check for exhaust manifold assembly = Found out that the catalytic converter is broken.

4) Repair Guides

1. Engine Tune Up.
   = Replace Spark plug.
   = Replace Air filter.
   = Replace fuel filter.
   = Chang oil engine.
2. Replace  assembly exhaust manifold.
3. Replace oxygen sensor.

more study

How To Diagnose Engine Vibration & Poor Acceleration.

This case probably occurs to the car due to human error.Car car was engine overhaul last to months. Due to engine overheating Radiator fan not working we found out that has an accident at the front and the fan module damage. it is not covered by warranty, we make total estimate for all the damage, after finish the owner take his car. then after two months again come and the problem is poor acceleration.
Model: Hyundai Azera
Year Model: 2009
Mileage: 40715km
Fuel: Gasoline
Displacement: 2700cc
T/A : Auto
Subject: Engine suddenly  poor acceleration – Engine compartment Junction box.
1) Condition:

1. Suddenly engine poor acceleration.
2. Engine excessive vibration.

2) Cause:

1. internal engine compartment fuse box.

3) Diagnosis:

1. Scan tool check
   = Fail safe ( limp home of throttle body, oxygen sensor, Oil control valve, Camshaft position sensor.)
2. Visually Check up
   = lift up the car by lifter to check if there is a damage. Front damage due to accident. and fix from outside workshop but some front harness wire dislocation from the original position.
3. Check the engine compartment fuse box if damage only  scratch.
4. pull out and check the wire connector – Ok
5. Re-fixed again the engine fuse box then connect the GDS(Global Diagnostic System) the trouble code is different from the first trouble code.
6. So replace the engine fuse box with good fuse box then start.
7. The problem disappeared.

4) Repair Guide

1. Replace engine compartment fuse box.

more azera study? | more info?
Hyundai Cars Elantra Fuel Delivery

How to Test a Fuel Delivery System?

= This teaching is one of most important if you have auto, so that you can analyze the problem of your car by your own.Some technical teaching has involve money or you have to enroll first in technical school. but I give you this for free, Thanks a lot for visiting my site and hope that this is not the first and last to visit me.
= Some problem of car due to fuel system.

1. Engine not Starting but cranking.
2. Engine suddenly cut off during driving.
3. Engine rough idling.
4. Engine poor acceleration.
5. Engine stalling etc.

Fuel Delivery System
Fuel Line:
A) Fuel Pressure Test

1. Reduce the internal pressure of the fuel lines and hoses
   a) Disconnect the pump harness connector.
   b) Start the engine and after it stalls, turn the ignition to switch off position.
   c) Disconnect the battery negative terminal.
   d) Connect the fuel pump connector.
2. Remove the bolt connecting the fuel line to the fuel delivery pipe.
   
   Caution:
   = Cover the hose connection with a shop towel to prevent splashing of fuel caused by residual pressure in the fuel line.
   
3. Using the fuel pressure gauge adaptor, install the fuel pressure gauge (A) to the fuel pressure gauge adaptor (B). tighten the bolt.
   
   Fuel pressure gauge to fuel delivery pipe
   24~35 Nm(250~350kg.cm, 18~26 lb.ft)
   
4. Connect the battery’s negative(-) terminal.
5. Apply battery voltage to the terminal for the pump drive and activate the fuel applied, check the that there is no fuel leakage form the pressure gauge or connection part.
6. Start and run the engine at curb idle speed.
7. Disconnect the vacuum hose from the fuel pressure regulator, and plug the hose end. measure the fuel pressure at idle.
   
   Standard Value:
   320~340 kPa (3.26~3.47kg/cm , 46~49 psi).
   
8. Measure the pressure when the vacuum hose is connected to the pressure regulator.
   
   Standard value:
   Approx.225 kPa (2.57 kg/cm 37 psi
   
9. If the result of the measurement made in 7 step and 8 are not within the standard value, Use the next table to determine the probable cause , and make the necessary repairs.

continue

How to Test a Fuel Delivery System

According to the Hyundai H1 Gasoline This a continuation of teaching.

Condition	Probable Cause	Remedy
Fuel pressure too low	=Clogged fuel filter =Fuel leakage to the return side, Cause by poor steering of the fuel steering of the pressure regulator =Low discharge pressure of the fuel pump	=Replace fuel filter =Replace fuel pressure regulator. = Check the in-tank fuel hose for leakage or replace the fuel pump.
Fuel pressure too high	= Sticking fuel pressure regulator. = Clogging or bent fuel return hose return hose or pipe.	= Replacefuel pressuire regulator. = Repair or replace hose or pipe.
There is no difference in fuel pressure when the vacuum hose is connected and when it is not.	= Clogged or damage vacuum hose or nipple = Sticking or poor seating of the fuel pressure regulator.	= Replace injector = Replace fuel pump.

10  Stop the engine and check the for a change in the fuel pressure gauge reading, which should hold for approximately 5 minutes. If the gauge indicator drops, observe the rates at which its drops.Determine and remove the caused according to the following table.

Condition	Probable Cause	Remedy
Fuel pressure drops slowly after engine is stopped.	injector leakage	Replace injector
Fuel pressure drops immediately after engine is stopped	the check valve within the fuel pump is open	Replace fuel pump.

11   Reduce the pressure in the fuel pump.

12   Disconnect the hose and gauge.

Caution
Cover the hose with the shop towel to prevent aplashing of fuel caused by fuel residual pressure in the fuel line.

13   Replace the o ring at the end of the hose.

14   Connect the fuel hose to the delivery pipe and tighten the bolt.

15   Check for fuel leakage.

more study

How to Resolve when The Air Bag Warning Light On?

Model: Grandeur/Azera(TG)

Year Model: 2008

Mileage: 60371km

T/A : All

Fuel: Gasoline

Displacement: 3300cc

Subject: Air Bag Warning Light On – SRSCM

1) Condition:

1. Airbag warning light turned on during driving.

2) Cause:

1. Internal fault to airbag control module (SRSCM).

3) Diagnosis

1. Scan tool check.
   = Diagnosis Trouble Code (B1620 SRSCM internal failure, B1361 DBPT Resistance high, B 1650 SRSCM Crash recorded).  
2. DTC is detected
   = But DTC B1620 is generated again (SRSCM internal failure).

4) Repair Guides

• Replace the airbag control module.

more study more Azera Study?

Hyundai TQ Cut Off During Driving

Model: Hyundai H1(TQ)
Year Model: 2009
Mileage: 40725km
Displacement: 2400cc
Fuel: Gasoline
T/A: All
Subject: Engine cut off during driving – Fuel pump.
1) Condition:

1. Suddenly engine cut off during driving especially on hot condition.

2) Cause:

• Malfunctioning fuel pump and it occurs during driving at engine hot condition.

3) Diagnosis

1. Scan tool check = no trouble found.
2. Check for fuel pump pressure with gauge = out of specification after an hour.

4) Repair Guides

• Replace Fuel pump motor.

more Study