Mountain GN
No, it doesn't have a V8.
- Joined
- Apr 19, 2006
So, after our Impala SS chewed the water pump this morning, we had to take the GN for a 100 mile trip in 110 degree weather. After experiencing a bizarre code 42 that caused a stumble at cruise, then went away, we hit some traffic where we saw a coolant temp of 235 on the Scanmaster. We got off the freeway and parked, went to Wal-Mart, and had some lunch. A couple of hours later, we crossed our fingers, got in the car and drove home, which involved driving up the I5 Grapevine in SoCal. On the 6 or 7 miles of level highway prior to the climb, we were running about 185, which is good, and when we started up the hill, we saw about 210 and no higher (AC off). Thought we were out of the woods and then...
We got off the freeway for the 18 miles back to the house. We have a long, gradual grade for about 7 miles before it levels off, then turns into a mountain road. As we were leveling off, the motor began to stumble and finally die. We pulled over and I popped the hood and didn't see anything amiss. I did notice that the O2's had dropped as the car was stumbling, indicating what I thought was vapor lock, even though the engine temps were around 205 or so. We sat for about 5 minutes and tried again. Car started normally and got us another mile before having the same problem. After waiting another few minutes we tried again and got another couple of miles. By this time, we were under a heavy rain storm and just sat for about 10 minutes. After that we, started the car and drove the last 4 miles home without incident.
Any idea what this could be? I checked the fuel lines and nothing was up against anything really hot. I don't think it's the fuel pump because I doubt it would come back after only a couple of minutes shut off.
Do I chalk this up to our freakish hot weather and see what happens or is there something else I should check?
We got off the freeway for the 18 miles back to the house. We have a long, gradual grade for about 7 miles before it levels off, then turns into a mountain road. As we were leveling off, the motor began to stumble and finally die. We pulled over and I popped the hood and didn't see anything amiss. I did notice that the O2's had dropped as the car was stumbling, indicating what I thought was vapor lock, even though the engine temps were around 205 or so. We sat for about 5 minutes and tried again. Car started normally and got us another mile before having the same problem. After waiting another few minutes we tried again and got another couple of miles. By this time, we were under a heavy rain storm and just sat for about 10 minutes. After that we, started the car and drove the last 4 miles home without incident.
Any idea what this could be? I checked the fuel lines and nothing was up against anything really hot. I don't think it's the fuel pump because I doubt it would come back after only a couple of minutes shut off.
Do I chalk this up to our freakish hot weather and see what happens or is there something else I should check?
. Well it only did that to me the first summer i had it. Has never done it to me since, i was told it was a bad ign module and coil pack after getting heatsoaked. But remember, if you have a bad ign module, a new coil pack wont do any good. The bad ign module will burn the new coil pack out, is this correct? Someone back me on this. But good luck!
