jjs316 Posted August 15, 2003 Report Share Posted August 15, 2003 The service engine soon light will come on in my 93 Z-34 3.4L when i am coasting down hills...thats the only time it will come on...Like Ill be driving and come to a downhill on the interstate and i will let off the gas to let it coast down the hill and my SES light comes on...Anyone know what would cause this??? :?: Quote Link to comment Share on other sites More sharing options...
PaPaPooh Posted August 15, 2003 Report Share Posted August 15, 2003 do a code check it might shoot out a code at you and you would have a better idea of what it is Quote Link to comment Share on other sites More sharing options...
92turboLE Posted August 15, 2003 Report Share Posted August 15, 2003 :withstupid: - Justin Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted August 15, 2003 Report Share Posted August 15, 2003 I bet you'll get an EGR code Robby Quote Link to comment Share on other sites More sharing options...
Slade901 Posted August 15, 2003 Report Share Posted August 15, 2003 Well, let me throw something.. Check all fluid levels and topped them off. ie, coolant reservoir level, oil level, maybe brake fluid level, etc. When the car is on an incline, then the fluid is not level and the sensor would think they are empty or low and then you will get the SES light ON, but when the car is level then all fluid goes back to being level and the SES light turns off. Quote Link to comment Share on other sites More sharing options...
Redfox340 Posted August 15, 2003 Report Share Posted August 15, 2003 I bet you'll get an EGR code I second that idea. Us W-Body owners usually have clogged / dirty EGR's. Check the codes and see what's up. - Erik Quote Link to comment Share on other sites More sharing options...
Devilsdawg Posted August 16, 2003 Report Share Posted August 16, 2003 i'd have to agree with Slade on the fluids--my 89 gp did the same till i filled the fluid Quote Link to comment Share on other sites More sharing options...
boostnawd Posted August 27, 2003 Report Share Posted August 27, 2003 I occasionally get the same problem. Coasting in gear for a while from highway speeds the SES light will come on. This is not dependant on incline or anything.. I know, I know, check the codes.. Does the ECU store the codes? Because upon restarting the car, the SES light is gone. Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted August 27, 2003 Report Share Posted August 27, 2003 Yes it stores them Robby Quote Link to comment Share on other sites More sharing options...
slick Posted August 28, 2003 Report Share Posted August 28, 2003 I bet you'll get an EGR code I second that idea. Us W-Body owners usually have clogged / dirty EGR's. Check the codes and see what's up. - Erik Had that happen with my beretta w/ 3100. Kept running the codes, even with a new EGR. Just get in there with some crap that will take out all the carbon, should help. Quote Link to comment Share on other sites More sharing options...
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