Try cleaning the TB and the EGR valve, even though the EGR should set a code if it was sticking open.
Low speed stall
I really need some help. My 99 Seville SLS stalls at low speeds, I drive
58 miles to and from work with no issues until I slow down for traffic jam or to get off at my exits. This only happens when I get to a very low speed and not always. I have had the TCC solenoid replaced because I was told that was it. It was OK through the winter, but now that its warming up a bit, it stalls regularly at low speeds. The only code I can get from the display is a 1599 code (stall condition)
58 miles to and from work with no issues until I slow down for traffic jam or to get off at my exits. This only happens when I get to a very low speed and not always. I have had the TCC solenoid replaced because I was told that was it. It was OK through the winter, but now that its warming up a bit, it stalls regularly at low speeds. The only code I can get from the display is a 1599 code (stall condition)
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I haven't replaced the CKP sensors yet but I did remove the IAC valve to look at it and it was full of carbon deposits. It idles smoother now and has not stalled until today. I got off at an exit going from 70 down to around 35 slowly. I noticed at one point while slowing down the tach suddenly dropped until I gave it gas and it recovered before stalling. Could this be related to the speed sensor on top of the tranny? Ranger or Sub are you out there?
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