'95 Bonneville problems
John5.7 87Iroc
07-01-2004, 03:03 PM
We have a '95 Bonneville, supercharged.
In short, the engine cuts every once in a while. It either will stumble for a few seconds then cut or other times it just cuts right out no warning. Other times too, it will set a code and stumble but won't die out. It can do these multiple times in one day and other times the car will drive without a problem for weeks at a time.
Also Doesn't matter if we are stopped or at cruising speeds. It will set the codes P0321 P1361 P0341 (and 0171 ocassionally) each time it happens.
We have changed the computer several times on advice from a gm tech who said these ecm's have a very high failure rate and that may be setting the codes and causing the problems. We have repllaced the ecm several times, all with used, and have gotton the same results with them all. So Im thinking of ruling out the ecm.
They have all given the codes
P0321
P1361
P0341
P0171 (Ocassionally)
P0740
P1567-Cruise control even thouigh we never use it
Also at cruising speeds on the highway, the torque converter will either remain unlocked when it should be locked or it will unlock randomly at a steady speed. It sets the code P0740. Agian this problem only happens sporadically.
Whats should we do now?
In short, the engine cuts every once in a while. It either will stumble for a few seconds then cut or other times it just cuts right out no warning. Other times too, it will set a code and stumble but won't die out. It can do these multiple times in one day and other times the car will drive without a problem for weeks at a time.
Also Doesn't matter if we are stopped or at cruising speeds. It will set the codes P0321 P1361 P0341 (and 0171 ocassionally) each time it happens.
We have changed the computer several times on advice from a gm tech who said these ecm's have a very high failure rate and that may be setting the codes and causing the problems. We have repllaced the ecm several times, all with used, and have gotton the same results with them all. So Im thinking of ruling out the ecm.
They have all given the codes
P0321
P1361
P0341
P0171 (Ocassionally)
P0740
P1567-Cruise control even thouigh we never use it
Also at cruising speeds on the highway, the torque converter will either remain unlocked when it should be locked or it will unlock randomly at a steady speed. It sets the code P0740. Agian this problem only happens sporadically.
Whats should we do now?
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