my 90 seville seems to be idling rough and eating up gas. it doesnt do it all the time but more so then not. just replaced the o2 sensor. and had the converter and all the injectors replaced a year ago.
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1990 Cadillac Seville Question: surging and excessive fuel useage off and on
Answer #1dandd December 18, 2009, 15:37Master
You need to have this issue Diagnosed with a scanner. it could be dozens of things. i used to work at a large GM Dealership and this is the best way to go.
Answer #2Visitor, November 23, 2010, 16:45
TPS problem. There is a procedure to setting one on this car.