1995 Pontiac Bonneville engine problems

Filed Mar 1, 2021 · Body, Brakes · 168,445 miles · OR · crash

I was going about 25 MPH when the truck ahead of me stopped. I hit the brake pedal hard and the brake pedal seemed hard as if it wasn't moving and my car just kept moving forward resulting in rear ending the truck ahead of me. I checked the brake fluid level after the car was towed home and the fluid level looked okay maybe down a little. Have never changed out the brake fluid and had the brakes recently checked by lew scwab tires brakes new brake shoes front and rear brakes okay

Filed Apr 4, 2011 · Engine, Fuel system · 125,000 miles · UT

1995 pontiac bonneville engine would suddenly shut off anytime, anywhere, at any speed, usually during warmer weather, leaving the driver with no power brakes nor power steering. The car usually would not start for at least 30 minutes, stranding the driver and passengers. After spending alot of time and money trying to diagnose the problem, we replaced a "functioning" yet defective tps (throttle positioning sensor) that did not malfunction to the point of registering a code on the computer. The problem has not recurred.

Filed Aug 27, 2010 · Engine, Transmission · 139,600 miles · PA

In february 2010, driving at 5 MPH while making right turn on bumpy blacktop, the engine fell out from under car causing steering to become inoperable. Car was towed from scene. Upon investigation it was found that 4 (rear) of 6 bolts holding engine cradle to uni-body frame pulled through rusted retainers. All (6) bolts, retainers, spacers and insulators were replaced. The steering linkage was reattached and the clock spring coil kit was replaced (clock spring was torn when steering linkage separated). This incident caused a lot of concern because it could have happened at any speed. Towing, repairs and parts cost $805.14. 4 months later the steering rack was found to be leaking and was replaced at a cost of $450. No parts have been retained but photos of the bolts in the frame with the engine sub frame hanging are available. Naturally the retainers that failed are gone because they fell off when they failed. The engine did not fall entirely from the vehicle because the 2 front bolts were still intact and the upper engine mount held the engine sub frame 2" above the road surface.

Filed Nov 26, 2008 · Engine · 57,000 miles · FL

Failure of the plenum, intake manifold on 3.8 litre engines.

Filed Apr 16, 2008 · Engine · MD

Car stalls with no warning, sometimes the car will start but 99% of time car has to sit for a long period of time before it will start. If car is turned off and then you try to start it back up it won't start. Don't have any idea of what is causing the problem. Would appreciate it if anyone could let me know how to fix.

Filed Aug 4, 2006 · Engine · 178,004 miles · NY

Driving at 65 MPH. Exhaust suddenly began spewing copious amounts of white smoke, which blinded many other motorists moving at the same speed. Engine began running very rough. I pulled over and shut it down. Vehicle was towed to mechanic, where it was diagnosed as a blown head gasket. Head gaskets were changed, as were all others needed to do this repair. Upon re-filling the radiator with antifreeze, it began leaking from unexpected places. Upon further investigation, it was determined that this was yet another case of the upper intake tunnel (plastic) having failed. I called the dealer, and was informed that this part has been redesigned, and due to the huge numbers of these needing to be manufactured and sold, the price has been reduced significantly. The old part had to be turned in to the dealer as a 'core' item.

Filed Nov 30, 2004 · Engine · NC

While driving vehicle stalled. Consumer was unable to restart vehicle, and had it towed to the dealer for inspection. Mechanic determined that the intake manifold needed to be replaced.

Filed Aug 12, 2004 · Engine · 143,605 miles · NC

While driving at any speed the engine produced smoke and it overheated. Please provide additional information.

Filed Jun 2, 2004 · Electrical, Engine · 71,000 miles · CA

I purchased this car used from a dealer in 2001 in michigan. (I don't think the air conditioning ever worked ). Within a few months the traction control went out. It would be on, when the car started, but within driving 300ft. Would go out and could not be turned back on from the button. A few months after that all of the dash lights went out when ever you turned on the head lights. This was due to a bad switch & a short. Then the cruse control went out. A few months after that we had to replace the head gaskets due to the engine over heating by an unknown cause. 1 month after that we had to replace the engine after throwing a rod and cracking the engine block, due to the fact that there was still fluind in the engine from melted manafold.( this all took place between nov. 2001 & jan. 2002) after that the ignition had to be replaced because one of the wires was severed due to the wheel tilt. (we would tilt the wheel & could not start the car). In nov. 2002 the transmission started to slip, we had it replaced. Then all at one time (2003) the battery went dead, the timing chain had jumped a tooth, the cam sensor, and the spark plugs which had been changed a few weeks before. A few weeks after that the engine overheated again due to a leak in the coolant resovoir bottel, this caused the head gaskets to blow again. It is now 2004 we have an ongoing electrical problem. Since mid 2003 we have gone through 3 PCM & 3 proms due to the fact the they kept frying ( a result of a bad ground that still can not be found), an altanator due to the fact that it had spikes. The check enging light would constantly come on & when the codes were pulled the egr vlave was listed, we replaced it and still the check engine light came on due to a still bad PCM. Now whenever we turn on the blinker the voltage gage moves in time with it due to a short. The RPM's surge at times while car is in motion or at idle, causing the car to satll or backfire. The cause is still unknown.

Filed Mar 27, 2004 · Engine · TN · 1 injury

The electonic climate control on my 1995 pontiac bonneville has stopped working....I get no cooling, only hot air all the time whether the control is set on air conditioning, heating and or if I just want to receive fresh outside air.