Aug 242019

Pontiac G6

I had to replace the whole fuel pump assembly several months ago. Since then I’ve had problems with the car dying. Next there is really no pattern as to when it dies. I have had it do it at 80 mph and at idle, even during start up. It does seem to do it more frequently at higher temperatures. Been thinking its the ECM, but would it be more likely if it were the fuel pump flow control module?

Where is the fuel pump flow control module located on the vehicle? and how do I test it to check if its malfunctioning?

First I am looking for what you are referring to as a flow control module. This vehicle has what is called a Fuel Pressure Regulator. This regulates the flow of fuel to the fuel injectors. The regulated fuel pressure can be tested. It is built into the same assembly as the fuel pump. Could be a loose of bad electrical connection of faulty replacement fuel pump assembly. Finally start there first since this is what was worked on last.

Fuel Pressure Regulator

The fuel pressure regulator is a diaphragm operated relief valve. The fuel pump is on one side of the regulator and the regulator spring pressure is on the other side. The function of the fuel pressure regulator is to maintain a constant fuel pressure under all of the operating conditions. The pressure regulator DOES NOT compensate for engine load by increasing the fuel pressure as the engine intake manifold vacuum drops. The vent on the fuel pressure regulator is an atmospheric vent only.

Fuel Pressure Regulator Location

The fuel pressure regulator is mounted on the fuel sender assembly.

Fuel Pressure Testing

  • Connect a fuel pressure gauge
  • Turn ignition on with engine off
  • Pressure should be between 56 – 62 if working properly
Fuel Pump Replacement 2008 Pontiac G6

Aug 042019

Pontiac Torrent

Hi my car makes a squealing whistling noise when reversing and turning, and sometimes driving. Id like to know what the cause is, and what the repair price would be?

This is one of those cases where you will need to diagnose the issue and then price the repair. There are so many possibilities that actually looking at the vehicle and diagnosing the problem is the better than guessing.

In general a whistle noise sitting still and revving the engine indicates a vacuum leak, it only while driving, it may be a loose or damaged body panel.

Jul 302019

Pontiac Grand Prix

I got a leak in my brake line. I’m wondering how do I remove the brake line that goes from the master cylinder to the front passenger caliper.

Simple version, unscrew the brake line from the the caliper and master cylinder. Remove any mounting along the brake line. Pull it out being careful not to bend it as you will want to use it as a guide to bend the replacement brake line.

Brake Line R&R

Caution: Always use double walled steel brake pipe when replacing brake pipes. The use of any other pipe is not recommended and may cause brake system failure. Carefully route and retain replacement brake pipes. Always use the correct fasteners and the original location for replacement brake pipes. Failure to properly route and retain brake pipes may cause damage to the brake pipes and cause brake system failure.
If sectioning brake pipe, use replacement pipe of the same type and outside diameter. Use fittings of the appropriate size and type. Only create flares of the same type or design as originally equipped on the vehicle.
Ensure that the brake pipe end to be flared is cut at a square, 90 degree angle to the pipe length.
1. Inspect the section of brake pipe to be replaced.
2. Release the brake pipe to be replaced from the retainers, as required.
3. Select an appropriate location to section the brake pipe, if necessary.
a. Allow adequate clearance in order to maneuver the J 45405.
b. Avoid sectioning the brake pipe at bends or mounting points.
4. Using a string or wire, measure the length of the pipe to be replaced including all pipe bends.
5. Add to the measurement taken the appropriate additional length required for each flare to be created.
6. Using the pipe cutter included in the J 45405, carefully cut the brake pipe squarely to the measured length.
7. Remove the sectioned brake pipe from the vehicle.
8. Select the appropriate size of brake pipe and tube nuts, as necessary. The brake pipe outside diameter determines brake pipe size.
9. Strip the nylon coating from the brake pipe ends to be flared, if necessary.
10. Chamfer the inside and outside diameter of the pipe with the de-burring tool included in the J 45405.
11. Install the tube nuts on the brake pipe, noting their orientation.
12. Clean the brake pipe and the J 45405 of lubricant, contaminants, and debris.
13. Loosen the die clamping screw of the J 45405.
14. Select the corresponding die set and install the die halves into the die cage with the full, flat face of one die facing the clamping screw, and the counterbores of both dies facing the forming ram.
15. Place the flat face of an unused die (1) against the die halves in the clamping cage and hold firmly against the counterbored face of the dies, Fig. 1.
16. Insert the prepared end of the pipe to be flared through the back of the dies until the pipe is seated against the flat surface of the unused die.
17. Remove the unused die (1), Fig. 1.
18. Ensure that the rear of both dies are seated firmly against the enclosed end of the die cage.
19. Firmly hand tighten the clamping screw (2) against the dies, Fig. 1.
20. Select the appropriate forming mandrel and place into the forming ram.
21. Rotate the hydraulic fluid control valve clockwise to the closed position.
22. Rotate the body of the J 45405 until it bottoms against the die cage.
23. While guiding the forming mandrel into the exposed end of pipe to be flared, operate the lever of the J 45405 until the forming mandrel bottoms against the clamping dies.
24. Rotate the hydraulic fluid control valve counterclockwise to the open position to allow the hydraulic forming ram to retract.
25. Loosen the die clamping screw and remove the dies and pipe.
26. If necessary, lightly tap the dies until the die halves separate.
27. Inspect the brake pipe flare for correct shape and diameter (a), Fig. 2.
28. If necessary, using the removed section of pipe as a template, shape the new pipe with a suitable brake pipe bending tool.
29. Install the pipe to the vehicle with the appropriate brake pipe unions as required.
30. If previously released, secure the brake pipe to the retainers.
31. Bleed the hydraulic brake system.
32. With the aid of an assistant, inspect the brake pipe flares for leaks by starting the engine and applying the brakes.
May 132019

Pontiac Firebird

The engine is over heating and the mechanics don’t know why. New heads, water pump, thermostat and sensors, etc. Over heats almost immediately. We are all stumped and need help. Thank you. 305 engine 5.0L.

Couple of possible things to look at.

  • Thermostat in backwards
  • Using just water instead of 50/50 mix
  • Low on coolant and or air pocket
  • No fan or fan shroud missing
  • Blocked of clogged radiator
  • Incorrect head gasket causing coolant passages to be blocked
  • Ignition timing
  • Faulty gauge reading (use an external infrared temperature gun)

Feb 282019

looking for reman engine. 1st gen with engine oil cooler.
cannot find one with the cooler.
mechanic says we can use a reman engine without the cooler and just run a bypass around the connections.
Is this advisable?

If a 1st gen Remanufactured Engine is what you want, I would advise continuing to look for it. Have you called Jasper Engines? If they do not have one in stock, they can and will use your engine and  re-manufacture it. They will even warranty the labor if installed by a qualified installer.

Jan 202019

Pontiac Grand Prix

Transmission Problem

Description of Problem: I took my 2007 Pontiac Grand Prix to a machanic in Greenville, Texas. It took him about 1 month to have it so called fixed, I drove it home and it seemed fine. It sat for maybe 2 weeks to get the money to have it tagged and inspected.
Well it started slipping again, check the fluid and it’s OK. No leaks, return it back to machanic and he says after having it 2weeks thru the holidays that he would check the filter which I don’t understand why a new wasn’t put on at time of repair.
Anyway while driving sometimes it it won’t shift, and then sometimes it won’t go into gear at all. I have to pull over shut it off and sit a second, then restart it to get it to go.
Any suggestions??? Help please

A clogged transmission filter or faulty transmission solenoid would be my first guess.

Jan 272018

2006 Pontiac Grand Prix

How to remove dash to repair radio?

Radio Removal – Short Answer

  • Remove the instrument panel (I/P) accessory trim plate. Refer to Instrument Panel Trim Plate Replacement – below
  • Remove the I/P center compartment.
  • Remove the HVAC control assembly. Refer to HVAC Control Assembly Replacement – below
  • Remove the radio screws.
  • Pull the radio toward you.
  • Disconnect the I/P wiring harness connectors and the antenna cable connector from the radio.
  • Remove the radio.

Instrument Panel Trim Plate Replacement


HVAC Control Assembly Replacement

Dec 272017

Pontiac Grand Prix

I put windshield washer fluid in my coolant tank. Is it safe to drive and is it a big deal? I put a gallon in.

Washer Fluid in Coolant

No. It is not safe to drive the vehicle this way. The engine is capable of overheating. Internal engine damage may occur.

You may be able to drain or suck out the the contaminated coolant. This is if you haven’t started the engine and only filled the reservoir. Disconnect the tank, drain it and put fresh coolant in it. No worries. Washer fluid is basically 95% water, 4% alcohol, .5% soap, and a .5% surfactant. The alcohol will evaporate. The surfactant and soap does not amount to much and there is water in your fluid already.

Coolant Flushing


When the cooling system becomes contaminated, the cooling system should be flushed thoroughly to remove the contaminants before the engine is seriously damaged.

  • Drain the cooling system.
  • Remove the coolant recovery reservoir
  • Clean and flush the coolant recovery reservoir with clean, drinkable water.
  • Install the coolant recovery reservoir.
  • Follow the drain and fill procedure using only clean, drinkable water.
  • Run the engine for 20 minutes.
  • Stop the engine.
  • Drain the cooling system.
  • Repeat the procedure if necessary, until the fluid is nearly colorless.
  • Fill the cooling system.


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)

Nov 062017

1986 Pontiac 6000

Heater fan only works on low or cold but not high. It is a 1986 Pontiac 6000 SE.

Heater fan only works on low

This is a classic description of a failed blower motor resistor. Replacing the blower motor resistor will solve the problem.

Labor time to replace the blower motor resistor is 0.3 hours. So it doesn’t take long at all to fix it yourself. So look at the top of the firewall on the passenger side. You’ll see the electrical connector there. Unplug the connector and remove the two screws. Pull upward on the resistor and replace in reverse order.

Blower motor resistor replacement

  • Disconnect the negative battery cable.
  • Unplug the electrical connector at the resistor.

blower motor resistor electrical connector

  • Remove the resistor attaching screws(2).

blower motor resistor 1986 Pontiac 6000

  • Remove the resistor from the evaporator case.