At a stop sign and my car just died

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Dec 022019

Pontiac Grand Prix

I was at a stop sign and my car just died, I turned off the radio, and heat and it started right back up. It is a 2000 Pontiac Grand Prix GT.

How often does this happen? Was this a one time thing?

If it happens often it may just be a sticking IAC Valve.

Continuing to crank but not start 2008 Pontiac Grand Prix

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Nov 072019

Pontiac Grand Prix

Suddenly car will crank just fine but not start. At the same time the car started continuing to crank after key is turned back. Where should I start troubleshooting?

Start your troubleshooting with reviewing the wiring diagram for the engine starting system. This will give you an idea of all the electronic components involved.  After reviewing the diagram myself the first thing that I see that could cause the issue would be the relays. Your engines starting system has two separate relays involved. The IGN1 Relay and the Crank Relay. Relays have a tendency to get stuck or stick in one position when they go bad. I am thinking that is what is taking place here.

Engine Starting Wiring Diagram


2006 Pontiac Torrent head light wiring diagram

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Oct 072019

Pontiac Torrent

Needing a wiring diagram for headlights and front parking lights. The dim and parking light on passenger side do not have proper voltage to them for some reason. The bright and turn signal work.

2006 Pontiac Torrent Headlights wiring diagram


2006 Pontiac Torrent Parking Lights wiring diagram


Is the Toyota Matrix transmission interchangeable with the Pontiac Vibe?

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Sep 292019

2005 Pontiac Vibe

2005 Pontiac Vibe, have a 2005 Pontiac vibe, AT, (1.8L, VIN 8, 8th digit), AWD (opt MU5) & I need to replace the tranny(transmission). I’d like to know, if in fact, the Toyota matrix tranny is interchangeable with the Pontiac Vibe? Also, is the 2003 Pontiac Vibe tranny interchangeable with the 2005 Pontiac

Transaxle(transmission) Swap

The 2003 – 2008 Pontiac vibe came with two different 1.8L engines and two different 4-speed automatic transmissions. The two different transmissions:

  • 4-speed A246E Automatic
  • 4-speed U341F Automatic

Any Pontiac Vibe transmission from 2003 – 2008 of the same type will work. Keep in mind that yours is an AWD and will require the transmission for an AWD. These are Toyota Built engines and transmissions for both the Vibe and Matrix. However, after looking at the part numbers and the year changes of the parts, it does not appear as though they are interchangeable. As for the 2003 Transmission, it is different than the 2005.

Pontiac Vibe
  • MU4 Transaxle P/N 24242212 (2003 – 2004)
  • MU4 Tansaxle P/N 24242207 (2005 – 2008)
  • MU5 Transaxle P/N 88974661 (2003 – 2004)
  • MU5 Transaxle P/N 2422208 (2005)
  • MU6 Transaxle P/N 88970223 (2003)
Toyota Matrix
  • Without AWD P/N 3050012A3084 (2005 – 2008)
  • With AWD P/N 305101A81084 (2003 – 2006)

Fuel pump flow control module 2009 Pontiac G6 3.5l GT

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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

2008 Pontiac Torrent makes a squealing whistling noise

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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.

How to remove a brake line on 2008 Pontiac Grand Prix

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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.

1989 Pontiac Firebird Formula Overheating

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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)

2006 Pontiac G6 remanufactured engine with oil cooler.

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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.

Transmission problem 2007 Pontiac Grand Prix

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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.