Question about 1997 Pontiac Bonneville
My 1997 Pontiac Bonneville started having problems today after I filled up with Shell gasoline. The car would cut out and die on the highway. I just wanted to get home, so I pulled over, waited a few minutes, and cranked it again. I'd be back on the road for a few minutes, and then the engine would die again. Same thing...over and over. As long as I was doing 75 MPH or so, no problem...but when I'd approach a stop sign or have to slow down for traffic, the car would sputter and die.
I appreciate any advice anyone can give me. I'd like to know what kind of repair this might necessitate and whether it's going to empty my savings. Thank you.
Shell has had issues with contaminated fuel in the past cant recall what it was but it actually damaged the fuel pump. I hope thats not the issue here can get costly in some cases fuel pumps on GM are a whole assembly. DOes the gas gauge still read properly? This was a big tell with the contamination last time. Gauge would read empty even when full.
Posted on Feb 01, 2009
Here's my history on this one: Car would run extremely rough at times, then run fine. Nearly die at times, then run fine. Shimmy and shake at low speeds and sometimes die, then run fine. Turned out to be at approximately 100K miles, faulty GM design of 3.6 engine. All GM 3.6 engines are designed with stacked units: plugs on bottom, exhaust return directly above plugs, coolant overflow directly above exhaust return. Over time, plastic reservoir for coolant overflow grows brittle and cracks from exhaust return superheat--ditto for plastic reservoir for exhaust return--ditto for plastic reservoir for plugs. Long story short: coolant dripped down into plugs, causing roughness/dying, followed by engine light error code on spark plugs, even though plugs were new, as leak grew. Remained a mystery until hydra-locked. Fix ran about $1500 about 4 or 5 years ago.
Posted on Apr 20, 2009
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