Dec 122017
 

1999 VW Bettle

I just bought this car and it will not idle. It runs down the road but when you let off the gas it dies.
The check engine lite was on and indicated multiple cylinder misfire. I cleared the code and while the lite has not returned the problem persists.


Some times it takes a while for a light to return where misfires are concerned. This is because the engine requires a misfire to occur a certain number of times inside a set amount of time in order to set a code. I would guess a vacuum leak of some kind. If you have the exact trouble codes feel free to post them in the comments.

VW Code P0300 – Random Cylinder Misfire Detected

VW Code P0300 Probable Causes

  • Faulty spark plug (s)
  • Faulty ignition coil (s)
  • Clogged or faulty fuel injector (s)
  • Intake air leak
  • Fuel injectors harness is open or shorted
  • Fuel Injectors circuit poor electrical connection
  • Ignition coils harness is open or shorted
  • Ignition coils circuit poor electrical connection
  • Insufficient cylinders compression
  • Incorrect fuel pressure
Dec 082017
 

Jeep Grand Cherokee Laredo

Mechanical Wining Noise

I’m not very car savvy. My car had made some sounds that sounded like a rusty shock almost, especially when turning. Then today after pulling it into a parking spot and turning it off, it continued to make sound. The sound was like a mechanical wining (fairly loud considering the engine being off) and it slowly dropped in pitch until stopping.

Burning Smell

Towards the end of the decline in pitch a white smoke began to come out of the hood, and a burning smell (not that dissimilar to the smell of rubber became very strong and still exists within the car. The car’s battery seems to be absolutely fine but the car doesn’t respond at all when I try to start it. The oil gauge is also a little low, but I THINK I know how to check the oil and I THINK it was at a decent volume.

I have no idea, and would just love any input as to what the hell just happened. THANK YOU!


Tough to diagnose a noise without hearing it but I’ll do my best.

My first thought is a pulley locked up and caused the serpentine belt to break. I would look to see if the belt is missing or burnt in a particular spot. Possibly the bearings went out of a idler pulley or tensioner pulley.(bearing failure is quite whinny)  Or the alternator locked up. All of which are rotated with the serpentine belt. If a pulley locked up it would cause the belt to burn (emit smoke as well) as it is being pulled over it. The belt also rotates the alternator which charges the battery. So if this was the issue the alternator wouldn’t be able to perform properly and would leave you with a weak battery.

The lights and radio may come on but the engine does nothing when you try to start it. This is normal for a weak battery. The radio requires as little as 5 amps to operate, the headlights up to 30 amps and the starter requires 250 amps. Big difference there.

You’ll probably need to have the battery fully charged(or replaced if older than 4 years) and the belt replaced. This is along with whatever part failed whether its a pulley, tensioner or alternator.

Door Lock Problem 1996 GMC Suburban

 Auto Repair Questions, Chevy, GMC  Comments Off on Door Lock Problem 1996 GMC Suburban
Dec 082017
 

Chevy Suburban

Door Lock Problem

I have a new to me Suburban, it is all power. This vehicle has a Smart Start Security System and the key fob will not lock the door. The right rear door is missing the up/down button to manually lock from inside. The right rear door will not lock using to front power lock button.

If I replace the handle/lock assembly on inside will I be able to lock the door from the inside if the actuator is bad?


Yes, if you replace all the missing “manual” components in the door. You will be able to manually lock the door. Even if the electrical actuator portion does not function.

Dec 032017
 

1999 Chrysler town and country

Stalls and dies

I have a 1999 Chrysler Town and Country lxi 3.8 engine. Every now and then when I come to a stop or slow down to turn my van stalls and dies. But when put in park or neutral it starts right back up with no problem. When I go to pull it into gear it stalls real quick and dies after several attempts it finally goes.


First thing to do would be to have the check engine light codes scanned. Any code stored may assist in directing you in the right direction. Post any code found below in the comments for further assistance.

Some possibilities if no codes are present may be but not limited to:

  • Dirty throttle body needs cleaned
  • Sticking or faulty IAC – Idle Air Control
  • Faulty TPS – Throttle Position Sensor
  • Faulty MAP – Manifold Absolute Prsseure Sensor
  • Vacuum leak

Engine Idle Speed

The TCM uses direct engine idle speed input and calculated engine idle speed (or target idle speed) input from the PCM over the CCD Bus. Target idle speed is compared against actual engine speed to determine the learned Throttle Position Sensor (TPS) value for closed-throttle idle.

Throttle Position Sensor

The Throttle Position Sensor (TPS) is used by the TCM to help determine shift points and shift quality. Additionally, the TPS output is spliced to the PCM for fuel control. The PCM provides a 5 volt supply and ground for the sensor. Target idle speed is compared against actual engine speed to determine the learned TPS value for closed throttle idle. This is done to correct for differences in system voltage and sensor tolerances.

If the TCM detects a faulty TPS signal, it provides continued operation of the transaxle by using the TPS value sent over the communications bus by the PCM.

Dec 012017
 

2003 Lincoln Town Car

I have a 2003 Lincoln Town Car Signature Premium. Great shape, low miles, excellent condition. Everything worked perfectly until yesterday! I noticed the battery terminals were corroded so I cleaned them. After I put them back on NOW the drivers side seat controls do not work, the mirror controls do not work, the air suspension light on the dash stays on and the power steering is barely working. I have checked ALL fuses (interior and exterior), checked the connections beneath the seat, the power steering fluid is full. I have disconnected the battery to let the modules reset…still nothing works. Any ideas?


Problems after cleaning battery terminals

Like you said, it was fine until you touched it. You cleaned the battery terminals which was the right thing to do. I would guess somehow some wiring got touched where it wasn’t supposed to or caused a brittle wire to break. But lets look at the wiring diagrams (provided below)of each circuit and see if we can find a connection.

Taking a quick look I can see the power mirrors and drivers power seat both share the same GROUND connection, G207. And looking at the electronic suspension and electronic power steering I can see they share the same TWO FUSES, number 8 and 10. You might want to double check those fuses not only to see if they are good, but that they have power going to them. Then check the ground connections for the rest.  If the corrosion was bad enough, there might be some additional corrosion in the battery cables themselves. If so, replacing the cables would be the next move.

  • mirror fuses 18, 30 ground G207
  • seat fuse 108 ground G207
  • electronic suspension fuses 8,10,114 and Electronic power steering connected from Air Suspension Module Pin 26 (LT GRN/BLK wire)- grounds G102 and G405
  • electronic power steering fuses 8, 10 ground G201

(DIAGRAMS BEST VIEWED IN GOOGLE CHROME OR FIREFOX)

Power Mirrors with electronic day/night mirror wiring diagram

2003-lincoln-town-car-mirrors-power-mirrors-circuit-w-electronic-day-night-mirror-1-of-1

Drivers power seat circuit wiring diagram

2003-lincoln-town-car-seats-driver-power-seat-circuit-1-of-1

Electronic suspension wiring diagram

2003-lincoln-town-car-electronic-suspension-1-of-1

Electronic power steering wiring diagram

2003-lincoln-town-car-electronic-power-steering-1-of-1
Nov 292017
 

2004 Acura MDX

Would you consider the camshaft oil seal to be an internal engine part?


I am sure some would say it is and others would say it isn’t. The others would be the warranty company looking to avoid paying.

One could argue that the oil seal can be changed without the need for opening up the engine. However the timing belt has to be removed along with the back cover. So if the timing belt is considered an internal engine component then the camshaft seal would also have to be considered internal.

My opinion is the camshaft oil seal is an internal engine component. I am basing this opinion on the replacement procedure of the oil seal itself according to the auto repair manual procedure. The new camshaft oil seal is to be installed first and then the camshaft into it. This means the camshaft needs to be removed before hand. And there is no denying the camshaft is internal. I will ad the auto repair manual procedure so you can get a better idea of what I am talking about.

Camshaft Oil Seal Replacement – 2004 Acura MDX

(best viewed using Google Chrome or Firefox)
2004-acura-mdx-camshaft-rocker-arm-camshaft-seal-and-pulley-installation

Nov 252017
 

Buick Century

What would make my car stall all of a sudden while I’m driving at 40mph. And now it will not start or even crank the engine over. It has gas, lights come on. Please if you can point me in the right direction.


Will not start but lights come on

Quick answer would be the BATTERY and or Alternator.

If the alternator quits working the engines computer and engine runs completely off the battery. This could be from a failed alternator, alternator connections or a broken serpentine belt. The engine continues to run off the battery until the voltage drops below the computers threshold then causes the engine to die. At this point the battery is too weak to crank over the engine.Generally if this is the case the BATTERY light comes on.

The battery does still have enough juice left to operate the lights and radio. The lights draw about 15 amps, the radio draws about 5 amps to function. The starter draws up to 250 amps to operate.

Nov 242017
 

2010 Pontiac G6

I put a new (used) motor in my 2010 Pontiac G6. And when you turn the car on the backup lights come on and stay on.All the lights on the dash work. But when you go to start it nothing happens. It won’t click it, won’t do anything. I figured it’s something to do with the security system but the security light goes off as soon as you turn the key on so I’m stuck.


We have developed a Flow Chart for diagnosing no start situations. Take a look. I will ad a wiring diagram of the starting system to help assist with this issue. Check your battery connections, then your starter fuse #26.

Starting Circuit Wiring Diagram – 2010 Pontiac G6

(best viewed in Google Chrome or Firefox)
2010-pontiac-g6-starting-circuit

Nov 242017
 

1994 Honda Passport

How do you remove the lower part of the timing belt cover the water pump is behind? It is a 1994 Honda Passport with a 24v V6.


Timing Belt Cover Replacement

3.2L (VIN V) Engine
1.Disconnect the negative battery cable.
2.Drain the engine coolant.
3.Remove the air cleaner assembly.
4.Remove the upper fan shroud and remove the cooling fan.
5.Remove the drive belts.
6.Remove the fan pulley assembly.
7.Remove the crankshaft pulley bolt and crankshaft pulley.
8.Remove the two oil cooler hose bracket bolts on the timing cover. Remove the oil cooler hose.
9.Remove the timing belt cover.
To install:

10.Install the timing belt cover and tighten bolts to 12 ft. lbs. (17 Nm).
11.Install the oil cooler hose and tighten brackets to 16 ft. lbs. (22 Nm).
12.Install the crankshaft pulley. Use tool No. J-8614-01, or an equivalent pulley holder and tighten the bolts to 123 ft. lbs. (167 Nm).
13.Install the fan pulley assembly and tighten the bolts to 16 ft. lbs. (22 Nm).
14.Install the drive belts.
15.Install cooling fan assembly.
16.Install upper fan shroud to the radiator.
17.Install air cleaner assembly.
18.Refill the engine with fresh coolant. Bleed the cooling system.
19.Connect the negative battery cable.

Nov 232017
 

1998 Toyota Corona

Jerks backward uncontrollably

My 1998 Corona Exiv rolls for a bit when in reverse, then stops suddenly even though the accelerator is still depressed. It eventually jerks backward uncontrollably for a few meters. Then responds to the brake pedal being depressed. This problem doesn’t occur when the car is in Drive.


This sounds to me like a transmission related issue. The first thing to check would be the transmission fluid level.

If the fluid level is low, top it off and retest several times. While checking the fluid if the color appears dark or burnt looking it may be too late. Burnt color fluid is an indication of worn internal material.