3800 V6 Engine Sensor Locations- Comments Page 2

Question: Can't find the PCV valve on my 99 Buick park avenue 3800 series 2. Need picture or location.
 Answer: As shown in the picture HERE, it is located in position #7. Remove the MAP sensor, and it is down in the passage.

Is there a inside ambient sensor on 2003 Pontiac Bonneville ?
 The word " Ambient" refers to outside temp. So technically- no. But the automatic air conditioning system does have in car air temperature sensors.

1995 Pontiac Bonneville with a series 2 engine it keeps losing power while driving and also while parked.
 Could be a crank sensor or ignition module going out, or a vacuum leak or PCV problem. Check to see if there are any trouble codes stored in the computer, as that will help in diagnosis and might lead you in the right direction.

What tool do i need to remove the idle air control valve?
 You need a TORX socket. I believe it is # 20.

1997 Bonneville SE and I wanted to know how do you remove the mass air flow sensor for replacement.
 Just remove the screws and remove the sensor.

1994 Buick LeSabre that will not start in cold ambient temperatures. I replaced ICM, Coil Pack, CTS, IAC, MAF, PCV, Fuel Pump, Fuel Filter, Plugs, Wires. Ia also, pulled the Plenum and lower intake to replace the gaskets and clean the throttle body. However, my car still refuses to start when it is cold outside. Once the temperature warms up to 45-50 degrees, the car starts and runs fine, No CEL codes. Any help is appreciated.
 Well, you sure have spent a lot of money guessing at parts. What is the fuel pressure when it is not starting? Did you check the fuel pressure regulator (FPR) ? Does it have spark and injector signal?

2003 3.8 supercharged Pontiac Bonneville I replace the upper and lower intake gaskets pressure tested my cylinders while the intake was off the #4 cyl leaks 35% on the intake valve. All other cyl where good. Put it all back together and now my coolant system if being pressurized. Could it be the 2 O rings on the upper gasket didn't seat right and the supercharger is pressurizing the coolant system?
 If the cylinder leak down shows 35% loss on intake valve, then you have a valve seat problem on that valve. Pressure on the cooling system is a blown head gasket.

I keep getting the TPS code and I keep changing it because my car is idling high. I have a 1998 Pontiac Grand Prix. What do you think it can be?
 If you keep replacing the sensor and still have the problem, then that is not the problem. Check for a broken wire at the connector.

Oldsmobile 3800 engine 70,000 miles. Car was quitting at random times, usually going slower like coming up to stop signs and cornering. Drove this way for a year, nothing major always started again. Started running real rough with real hesitation when flooring it. Then started having trouble starting. Put in Mass Air Sensor and car started and ran OK, not great! Still no pick up on HWY. Parked in dark garage and watched sparks jumping from plug wires all over the place. Replaced plugs and wires, car I thought was running terrific, more power than I have had for quite a while. Drove around 15 minutes and pulled back in driveway and shut down and tried to start again. Starts and quits unless giving it a little gas and I thought I could smell gas. I am thinking Temp Sensor because it seems to me it may be sending to much fuel like it is thinking its sending fuel for a cold start! Any Suggestions Greatly Appreciated
 Check the fuel pressure regulator (FPR) for leaking. Pull off the vacuum hose when engine not running. If you see or small gas, replace it.

My check engine light is on. Code says EVAP. Replaced the gas cap already. Where are the vacuum lines I should check? Or anything else I should check?
 There are many lines, hoses and seals that would need to be checked. Depending on your car make and model, it could be a bad vent valve, purge solenoid, gas tank module seal, etc.

Where is the climate control vacuum line on these motors? I have a 2004 Chevy Monte Carlo 3.8L N/A and was told its some where on the fire wall is that right and how to you remove to connect to a blower for a conversion kit.
 If your system is vacuum controlled and not electric, it is located under the passenger side of the dash. It would be a large purple line.

1999 Pontiac Bonneville 3800, Started Misfiring with no initial check engine light, Misfired at idle speeds such as backing out my drive way runs ok at highway speeds with plenty of power. Shortly afterwards check engine light came on I took it to auto parts store and they said it had code stating number 4 cylinder misfire. Replaced spark plugs and check engine light went off after a while but it still misfires. Its most noticeable at idle speeds like when I back out of driveway. Any ideas of what it may be?
 At low speed without any throttle input, this is usually caused by a vacuum leak. If you do press on the gas pedal, then look for a bad ignition coil or spark plug wire.

1998 Buick Park Avenue Ultra. Supercharged 3800 Series II. I was supposedly overheating. New water pump, thermostat and belts. I removed the thermostat, no change. The coolant temperature sender below the thermostat was shot...pegging the needle and saying it is overheated when it wasn't. Why is my engine still running at 190*F with no thermostat? And where is the secondary coolant temperature sensor?
 Running no thermostat is the same thing as having a thermostat that is stuck open. The vehicle will not overheat, but will won't make normal operating temperature either. It should be about 210 degrees with a functional thermostat, so 190 isn't that far off and quite normal without one. Also, there is only one coolant temperature sensor, and it is located right below the thermostat housing area. There is NO secondary temp sensor on your car.

1999 Pontiac Bonneville 3800 non sc no start after warm. Pour gas into throttle boot run until I cut it off then... No start. Remove the new egr to see if it is clogged,clean pour gas into boot again starts and runs. Took the fuel regulator apart looks fine. What am I missing?
 You have a bad fuel pump. Check the pressure when the car is acting up.

I'm experiencing rough idle issues with my 2000 Buick Regal (180K miles)after it warms up. It runs fine most of the time but periodically the rpms will studder like a hiccup. Stalled twice. Replaced the fuel filter first but no change. Searches on the web suggested a fouled IAC (Air intake controller) sensor or faulty MAP's sensor. I pulled the IAC sensor and was suprised to find a good deal of carbon build up on the sensor, some of which had come loose and lodged in the plunger spring behind the seat. I'm concerned that carbon build up may be fouling other sensors as well. What is the best way to clean the carbon build up in the throttle body and air intake of a 2000 Buick Regal?
 Remove the Idle control motor and use carb cleaner or Seafoam. Also clean inside the throttle plate and the bore.

1997 Pontiac Grand Prix se v6 3.8L. I changed thermostat, heat sensor flushed radiator and now I need to replace the temperature sending unit but I need to know where it is or is it the same thing as the heat sensor. Please help at my wits end.
 The coolant temperature sensor is located near the thermostat. See previous page.