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Swapped a 3100 from a 96 Olds Ciera into a '95 Lumina with help from the guys in the swap forum. The Lumina engine had overheated, had a stuck piston, and coolant in the oil. The engine in the Olds ran fine before I pulled it. I swapped the upper intake and related parts and ran (almost) all the sensors from the Lumina. The Lumina had been sitting for about a year, so I used the injectors from the Olds, too.
Work done to the Olds engine before installing included: new standard size rings and bearings, light cylinder honing, new timing chain, new plugs, new 195 thermostat (drilled a 3/32" hole in it), all new major seals and gaskets.
After starting the engine, I soon smelled a strong hydrogen sulfide odor at the exhaust and the temperature gauge slowly climbed all the way up until the "hot" light came on (when I shut it off) without the fans kicking on. The thermostat had opened, but the heads were cool enough to hold a finger on them (?) There is an exhaust sound that is sort of like a bad valve or an engine miss - but the engine did not miss at all before the swap. [Now that I think of it, I am running the coil pack and plug wires from the Lumina - I will swap those items for those from the Ciera.] The rotten egg smell and the "miss" are pretty much continuous. I checked the fuel pressure regulator and could not find evidence of raw gasoline. I am running old wires that show no arcing at night.
I could only get 10 quarts of 50/50 coolant into it initially (specs say it holds 12.5). After one good heat/cool cycle, I was able to add about another quart, so now I am theoretically about 1.5 qts low on coolant. Heater is blowing hot air.
Can a miss cause the rotten egg smell? Or do I have a bad cat that probably killed (or was an accessory to murder) of the first engine?
Could this be caused by old gasoline? Or maybe water in the gasoline?
Is there an easy way to troubleshoot the fans?
The Lumina had a low oil sensor that I did not see until I had buttoned up the oil pan. I did not want to re-do the pan, so the plug hangs free and I have a "low-oil" warning light on all the time. I plan to measure resistance on the sensor with the float in the up position and apply that resistance across the plug to turn off the light.
Any help will be greatly appreciated.
[EDIT:] When first fired up, the engine ran without a miss, then, as it warmed up a bit, I heard a backfire that seemed to originate in the exhaust, then another. As the car got warmer, the intensity of the backfire seemed to decrease, but the frequency increased until the car ran as if with a light miss. This is hardly enough to cause any engine vibration at idle, but you can definitely hear it at the tailpipe.
Work done to the Olds engine before installing included: new standard size rings and bearings, light cylinder honing, new timing chain, new plugs, new 195 thermostat (drilled a 3/32" hole in it), all new major seals and gaskets.
After starting the engine, I soon smelled a strong hydrogen sulfide odor at the exhaust and the temperature gauge slowly climbed all the way up until the "hot" light came on (when I shut it off) without the fans kicking on. The thermostat had opened, but the heads were cool enough to hold a finger on them (?) There is an exhaust sound that is sort of like a bad valve or an engine miss - but the engine did not miss at all before the swap. [Now that I think of it, I am running the coil pack and plug wires from the Lumina - I will swap those items for those from the Ciera.] The rotten egg smell and the "miss" are pretty much continuous. I checked the fuel pressure regulator and could not find evidence of raw gasoline. I am running old wires that show no arcing at night.
I could only get 10 quarts of 50/50 coolant into it initially (specs say it holds 12.5). After one good heat/cool cycle, I was able to add about another quart, so now I am theoretically about 1.5 qts low on coolant. Heater is blowing hot air.
Can a miss cause the rotten egg smell? Or do I have a bad cat that probably killed (or was an accessory to murder) of the first engine?
Could this be caused by old gasoline? Or maybe water in the gasoline?
Is there an easy way to troubleshoot the fans?
The Lumina had a low oil sensor that I did not see until I had buttoned up the oil pan. I did not want to re-do the pan, so the plug hangs free and I have a "low-oil" warning light on all the time. I plan to measure resistance on the sensor with the float in the up position and apply that resistance across the plug to turn off the light.
Any help will be greatly appreciated.
[EDIT:] When first fired up, the engine ran without a miss, then, as it warmed up a bit, I heard a backfire that seemed to originate in the exhaust, then another. As the car got warmer, the intensity of the backfire seemed to decrease, but the frequency increased until the car ran as if with a light miss. This is hardly enough to cause any engine vibration at idle, but you can definitely hear it at the tailpipe.
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