Dec 212018
 

Reverse gear is very very slow to engage when the GB is cold drive 100 meters about 30 ft and it will engage, but leave it standing it soon goes back to being difficult to engage. This has been a problem for seven years. I very recently changed the oil and filter, the oil pan was clean with no swarf on the magnet. All gears shift smoothly with no slip


Dec 202018
 

Fuel pump diagram 1993 Dodge W150

I just bought this truck and it needed a fuel pump. The fuel pump was replaced with the wrong fuel pump before. I ordered a new fuel pump, but it is quite different. It has an return and outlet line. The truck only has an outlet line and one that is very small that I was told was a vent. The old pump had a component that didn’t come with the new pump that had to be moved to the new pump. Not sure what it is, but the small line on the truck fits it and that is where it was on the old pump. I connected it up and of course had no line to go on the return on the new pump and the truck is running. I’m afraid to keep running it if its wrong. I’m baffled. Ive replaced fuel pumps before and never had the both return and out take lines on the pump.


Should be just fine to drive.

Fuel Pump Testing for 1993 MODELS

2.5L/4-151 & 3.0L/V6-181

 

1. Release fuel system pressure as outlined under”Fuel System Pressure Relief. “
2. Disconnect5-16 inch fuel supply hose from engine fuel line assembly.
3. Connect fuel system pressure tester tool No. C-4799B or equivalent between fuel supply hose and engine fuel line assembly.
4. Activate fuel pump and pressurize the fuel system using the DRB II scan tool.
5. If gauge reads 13. 5-15. 5 psi, pressure is correct.
6. If pressure is not as specified, record pressure, then install pressure tester in the fuel supply line between the fuel tank and fuel filter at the rear of the vehicle.
7. Activate fuel pump and pressurize the fuel system using the DRB II scan tool.
8. If pressure is 5 psi higher than previously recorded, replace fuel filter.
9. When no change is pressure is noted, gently squeeze return hose. If pressure increases, replace pressure regulator. If there is no change in pressure reading, problem is either a plugged pump filter or a defective fuel pump.
10. If pressure is higher than specified, remove fuel return line hose. Connect a three foot hose to the return line. Place other end in a suitable container.
11. Repeat test. If pressure is now correct, check intank return hose for kinking or restrictions.
12. If pressure is still above specified pressure, remove return hose from throttle body and connect a suitable hose to the throttle body and place the other end into a suitable container.
13. repeat test. If pressure is now correct check for a restricted fuel return line. If change is pressure is not observed, replace fuel pressure regulator.
Dec 202018
 

Jeep Cherokee

There are conflicting reads that my 2019 Jeep Cherokee does/does-not have Rain-Sensing-Wipers. Anyone have access to dealership programmable options to check this out?


It is definitely available on the older Cherokees. I don’t know for certain if it is for the 2019. I wouldn’t think they would discontinue the feature though.  I will post this  so others may have a chance to post if they know different.

Dec 202018
 

Winter Driving

Is it advisable to warm up a vehicle prior to driving it in very cold winter conditions? I would like to know the pros and cons of this including whether driving a vehicle in the cold without warming it up first is hard on it mechanically or could cause potential damage. Please apply to all vehicles made within the last 15-20 years.


Warm up a vehicle prior to driving it in very cold winter conditions?

Yes. I would advise allowing the vehicle to warm under VERY cold conditions. That being said, the vehicle manufacturers have put in place many sensors on the vehicle that allow for not warming it prior to driving. These sensors calculate the temperature and fluctuate the demand influenced on the vehicle. This allows for uninterrupted performance in hot or cold weather. 1995 – 2000 are not quite as good as the newer vehicle operating systems but are adequate none the less.

Metal expands, aluminum expands at a different rate than cast iron. But as long as there is enough lubrication at the friction points of the engine, little to no harm is done. It takes a long time for a properly lubricated engine to show signs of damage. On the other hand, the transmission will render more damage under different climate conditions than the engine. However the later model cars are manufactured using synthetic lubrication in the transmissions now that help. So the weakest point in the car is the transmission under any weather condition.

Mechanical parts will perform their best in the engine and transmission once warmed to normal operating temperatures. The damage that will occur is almost immeasurable in short term.

Pros and Cons of warming your vehicle in cold temperatures

Pros:

  • The engine oil will lubricate at its best once warmed
  • The vehicle will be nice and comfy warm
  • Windshield will be defrosted if applicable
  • Windshield wipers will perform better

Cons:

  • The windshield will most likely have frost on it making it difficult to see
  • Not optimal for engine lubrication
  • Fuel consumption
  • Exhaust fumes, especially when vehicle is parked in a garage

What others have to say about warming the vehicle in cold weather

“The oil is the lifeblood of the engine,” Joseph Henmueller, president and COO of Automotive Maintenance and Repair Association, said.

Henmueller suggested that cars should idle one to two minutes before driving in cold weather. When temperatures drop to freezing, or when it’s cold enough that windshields will frost over, the oil needs to warm up before it can move smoothly throughout the car.

“Fluids get thicker when it is cold, so to lubricate properly they need 60 to 120 seconds of the engine running,” he said.

Without properly letting the engine run, Henmueller said, you may be cutting your engine’s life short.

Experts at Penzoil have a different theory.


Technical Advisor Shanna Simmons said it is a myth that engines need to idle on a cold winter day.

“While it does take longer for motor oil to pump in extreme cold temperatures, we are talking milliseconds, not minutes,” she said. “Your engine will warm up the oil much faster when driving at full speed — not to mention idling wastes gas.”

The Environmental Protection Agency lines up with those who say warming up your car is not only not helpful but is wasteful.

Both the EPA and Energy.gov say a car should not idle for more than 30 seconds at a time. Not only is it more environmentally friendly, but also cost-effective. Idling for 30 seconds actually uses more fuel than restarting the car.

Dec 092018
 

2010 Chevy Suburban

Driver side seat will not heat. Is there a quick way to find out what the root of the problem is whether it be in the switch, a fuse/relay, or the heating element itself? I had a local mechanic tell me once I’d be better off finding a new seat in a junk yard than to try to buy parts to fix it. Thought I’d get a second opinion.

When you press the button on the door to activate the heater, the red light does come on but does not heat. The AC part of the seat cooler does work, but the heater part does not. Thanks for your help.



Generally there is a Body Code that will be stored. A Dealership or well equipped mechanic shop should have a scan tool that can pull the codes that will help guide you to the root of the problem without guessing.  No easier way than that.

Example Codes for heated seat malfunction:

Diagnostic Trouble Codes   B2345-4B  Seat Heater Elements Current Sensing Calibration Out of Range
Diagnostic Trouble Codes   B2425-04  Left Seat Heater Cushion Circuit Open
Diagnostic Trouble Codes   B2425-0A  Left Seat Heater Cushion Circuit Rate of Change Below Threshold
Diagnostic Trouble Codes   B2425-0B  Left Seat Heater Cushion Circuit Current Above Threshold
Diagnostic Trouble Codes   B2425-0C  Left Seat Heater Cushion Circuit Current Below Threshold
Diagnostic Trouble Codes   B2425-0D  Left Seat Heater Cushion Circuit Resistance Above Threshold
Diagnostic Trouble Codes   B2425-0E  Left Seat Heater Cushion Circuit Resistance Below Threshold
Diagnostic Trouble Codes   B2425-1F  Left Seat Heater Cushion Circuit Intermittent
Diagnostic Trouble Codes   B2430-04  Right Seat Heater Cushion Circuit Open
Diagnostic Trouble Codes   B2430-0A  Right Seat Heater Cushion Circuit Rate of Change Below Threshold
Diagnostic Trouble Codes   B2430-0B  Right Seat Heater Cushion Circuit Current Above Threshold
Diagnostic Trouble Codes   B2430-0C  Right Seat Heater Cushion Circuit Current Below Threshold
Diagnostic Trouble Codes   B2430-0D  Right Seat Heater Cushion Circuit Resistance Above Threshold
Diagnostic Trouble Codes   B2430-0E  Right Seat Heater Cushion Circuit Resistance Below Threshold
Diagnostic Trouble Codes   B2430-1F  Right Seat Heater Cushion Circuit Intermittent
Dec 092018
 

Chevy Suburban

 

I have a front left axle to replace. Do I really need to remove the coil over strut and sway bar end link to do this?


Not according to the manual.

CV AXLE SHAFT, Replace

1. Raise and support vehicle.
2. Remove wheel and tire assembly.
3. Remove drive axle center cap, if equipped.
4. Insert a drift or large screwdriver through brake caliper into one of the brake rotor vanes in order to prevent drive axle wheel drive shaft from turning.
5. Remove nut and washer from hub. Do not reuse nut. A new nut must be used when installing wheel drive shaft.
6. Using axle remover tool No. J 45859 or equivalent, press wheel drive shaft from hub.
7. Remove bolts securing wheel drive shaft inboard flange to output shaft flange.
8. Remove drift from rotor.
9. Remove stabilizer shaft link from lower control arm.
10. Wrap shop towels around both inner and outer wheel drive shaft boots in order to avoid damage to boots during removal.
11. Pull wheel drive shaft through lower control arm opening.
12. Reverse procedure to install, noting the following:
a. Torque inboard flange bolts to 58 ft. lbs.
b. Torque hub nut to 177 ft. lbs.
c. Torque wheel lug nuts to 140 ft. lbs.
d. Torque stabilizer shaft link nuts to 17 ft. lbs.
Dec 092018
 

J2000 eep Grand Cherokee

I was given a jeep without an ignition or key. I bought a new Dorman ignition with key. How do I code it without original key and ignition?


You can use any dodge key and code it to match or take your VIN# to the dealership to get an original cut key.

Model Year Model Year Skill Code Factory Time Labor Time
IGNITION LOCK CYLINDER, R&R
 Grand Cherokee ……………………. 1999-04 B 0.4 0.5
Additional Labor
Model Year Factory Time Labor Time
 To Recode Lock Cylinder,
  Add …………………………….. 1999-04 0.3
Dec 092018
 

2006 GMC Envoy

Did the 2006 GMC Envoy XL-SLT ever come with Tow Hooks either front or rear? I cant get a positive answer from the local GMC Dealer. My almost former Chevy Trailblazer LT model had them. The Envoy has the Towing pkg but no towing hooks of which I’m surprised>
PeterK


Envoy did not come with factory tow hooks….

Envoy is the “Luxury* edition

Trailblazer is the more “sport” edition

That’s the reason behind Envoy’s not getting factory tow hooks, even the Denali did not have them.

I know, as I asked every place I went when shopping around for my Envoy, they never had that option available. I was told that if I wanted tow hooks, I’d have to buy the Trailblazer.

Source: Voymom@gmtnation.com