Nov 212017

Chevy Silverado

My battery went dead. I replaced it. Now I have no power windows, locks, lights, etc. and it wont start.

No power windows

My guess would be you didn’t get it connected right, have corrosion at the battery/cables or you managed to blow a fuse or two. The starter has a relay a two fuses to check. Fuse 60 and 64 should be checked. The windows do not have a fuse, this is what leads me to think it is a bad connection at the battery. Not to mention it was the last thing that was worked on. Double check your work.

Nov 192017

2005 Chevy Trailblazer

Can I have broken trans axle removed and convert to 2 wheel drive? It is a 2005 Chevy Trailblazer 4×4 auto. Thank You

Anything is possible with enough time and money but I wouldn’t recommend it. Oil would leak out of the front differential. This would also allow water to get into the differential.

Front Drive Axle Description and Operation

Selectable Four Wheel Drive (S4WD) Front Axle Description and Operation

The Selectable Four Wheel Drive (S4WD) Front Axle consist of the following components:

  • Differential Carrier Housing
  • Differential Case Assembly
  • Inner Axle Shaft
  • Intermediate Shaft Bearing Assembly (located on the right side of the oil pan)
  • Electric Motor Actuator

The front axle on Selectable Four Wheel Drive (S4WD) model vehicles uses a disconnect feature mounted on the right side of the oil pan in order to engage and disengage the front axle. When the driver engages the 4WD system, the Transfer Case Control Module sends a signal to the electric motor actuator to energize and extend the plunger inside. The extended plunger moves the clutch fork and clutch fork sleeve across from the clutch fork outer gear that is splined to the right side wheel drive shaft to the clutch fork inner gear that is splined to the inner axle shaft. The locking of the two gears allows the axle to operate in the same manner as a semi-floating rear axle.

A propeller shaft connects the transfer case to the front axle. The differential carrier assembly uses a conventional ring and pinion gear set to transmit the driving force of the engine to the wheels. The open differential allows the wheels to turn at different rates of speed while the axle continues to transmit the driving force. This prevents tire scuffing when going around corners and premature wear on internal axle parts. The ring and pinion set and the differential are contained within the carrier. The axle identification number is located on top of the differential carrier assembly or on a label on the bottom of the right half of differential carrier assembly. The wheel drive shafts are completely flexible assemblies consisting of inner and outer constant velocity CV joints protected by thermoplastic boots and connected by a wheel drive shaft.

Automatic Four Wheel Drive (A4WD) Front Axle Description and Operation

The Automatic Four Wheel Drive (A4WD) Front Axle consist of the following components:

  • Differential Carrier Housing
  • Differential Case Assembly
  • Inner Axle Shaft
  • Intermediate Shaft bearing Assembly (located on the right side of the oil pan)

The front axle on Automatic Four Wheel Drive (A4WD) model vehicles do not have a disconnect feature in order to engage and disengage the front axle. The Automatic Four Wheel Drive system uses the same differential carrier assembly and intermediate shaft bearing assembly, but the clutch fork, the clutch fork sleeve and the inner/outer gears have been replaced with a single splined sleeve that connects the inner axle shaft directly to the right side wheel drive shaft. This connection allows the right side wheel drive shaft and the intermediate axle shaft to be directly connected to the differential case assembly. It also results in having the wheel drive shafts, the intermediate axle shaft and the propeller shaft to spin continuously. When the transfer case is active, the clutch assembly within the transfer case controls the amount of torque applied to the front axle. The remaining components are the same as the selectable four wheel drive axle.

Nov 192017

1999 Ford Escort

Loaned daughter my extra car

Loaned daughter my extra car and while driving on freeway it started acting up. Loss of power, roughness and when she got home car stopped after making loud clunking noise. I pulled out all four spark plugs and the #4 plug was badly damaged. It also appears that the #4 piston is not moving up and down when crankshaft is turned by hand. I can also see some debris is the cylinder. I checked the oil and found that the level is about one and a half times over the full mark, I am guessing about 10 to 12 quarts of oil is present, why I don’t know. Can this amount of overfill cause engine damage?

The extra oil wouldn’t be the cause of the engine damage you described. I would look to see if the coolant or transmission fluid is low. One of the two may have gotten into the oil. Otherwise the oil may have been added after the engine started to make noise as an attempt at fixing it. Either way the engine is toast and will need to be replaced.

Nov 192017

SAAB 900

I bought a 1995 Saab 900 SE convertible with 109,000 miles and it has some issues.

  • has a check engine and SRS light
  • codes came back and were cleared
  • knock sensor, mass airflow sensor, p0326 p0331/2 p0102, p0113
  • the exhaust sounds loud
  • should i be worried? will this effect my emissions?

Will this effect my emissions

Code P0326, P0331 and P0332 (Knock Sensors) will not cause any engine performance problems. Code P0102 will cause engine performance issues and emission issues because of that. Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor.

Code p0113 refers to the IAT which is located in the air intake around the same area as the MAF sensor. I would check the connections and clamps to make sure there just isn’t a loose connection.

Code P0326 – Knock Sensor Circuit Performance

P0326 Probable Causes

  • Faulty Knock Sensor
  • Knock Sensor circuit poor electrical connection
  • Knock Sensor harness is open or shorted
  • Faulty Engine Control Module (ECM)

Code P0102 – Mass Air Flow Circuit low input

P0102 Probable Causes

  • Faulty mass air flow sensor
  • Intake air leaks
  • Dirty mass air flow sensor
  • Dirty mass air filter
  • Mass air flow sensor harness is open or shorted
  • Mass air flow sensor circuit poor electrical connection

Code P0113 – Intake Air Temperature Sensor Circuit High

P0113 Probable Causes

  • Faulty Intake Air Temperature (IAT) sensor
  • Dirty air filter
  • Intake Air Temperature (IAT) sensor harness is open or shorted
  • Intake Air Temperature (IAT) sensor circuit poor electrical connection
Nov 152017

2006 KIA Sportage

How difficult or easy would it be to replace the ignition coil?
specifically the coil for cylinders 3 and 6?

The labor time for replacing an ignition coil is 0.6 hours.

On the 2.7L engine it appears as though there is one ignition coil.

Shop Automotive

Ignition Coil Replacement – 2006 KIA Sportage2.7L engine

1.Remove engine cover.
2.Disconnect spark plug cables and electrical connector.
3.Remove ignition coil.

ignition coil removal 2006 KIA Sportage

To Install:
1.Install ignition coil.
2.Connect spark plug cables and electrical connector.
3.Install engine cover.

Nov 152017

Saturn Ion

Code P0420

Engine light came on. We get two codes, both showing P0420. Since this code came up twice, does this mean that the catalytic converter needs to be replaced? Or should I try replacing the downstream oxygen sensor first?

The most common reason for code P0420 is a failed catalytic converter. The code appears because the sensor has detected this failure. Now of course you would want to rule out that the sensor is functioning. This can be done with a scan tool by looking at the voltage readings. You might want to rule out the less expensive options before replacing any parts.

Saturn Code P0420

Description: Catalyst System Efficiency Below Threshold Bank 1

P0420 Probable Causes:

  1. Sensor or solenoid faulty
  2. Connector terminal contact is damaged or corroded
  3. Wire harness – Check harness for correct voltage, open, short to ground or short to voltage
  4. Update control unit software – Check for the latest control unit update
  5. Powertrain or Engine Control Module faulty
  6. HO2S sensor contamination/damaged
  7. Exhaust leaks or restrictions
  8. Catalytic converter damage
  9. Catalytic converter improper operation
Nov 132017

Chevy Impala

My car had the intake gaskets replaced. I put it back together. A couple bolts in the upper intake and throttle body. Also has broken vacuum hose for the fuel pressure regulator and the canister purge valve. Now it runs rough and puffs smoke that smells like gas. And I have to apply the gas to keep it running. What can cause this?

I would start by re-checking your work. Repair any vacuum leaks. Repair the vacuum leak at the fuel pressure regulator. Check to see if the intake gasket is still leaking. Just because the gasket was replaced doesn’t mean it was done right.

If the check engine light is on, check the codes and post them below in the comments. The codes will help point us in the right direction.

Lower Intake Manifold Replacement – 2001 Chevy Impala

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