1999 Blazer runs rough when it warms up
#1
1999 Blazer runs rough when it warms up
I have a 1999 Blazer which runs very well during the winter but when the weather warms up or even when it is cold and I drive on the highway for a while and warm it up well, it starts idling rough. WHen I begin to accelerate it smooths out but when it goes back down toward idle at a stop, it starts running rough again. There is no check engine light coming on or engine codes and the check engine light does work. Someone suggested it could be a bad ignition module but I have not swapped that out. The key is it is when it is warmed it up it happens. Any thoughts and thanks.
#2
did you check the fuel pressure? check this link out for more information on testing the fuel pressure
https://blazerforum.com/forum/tech-a...agnosis-23038/
whens the last time you did a tune up ?
https://blazerforum.com/forum/tech-a...agnosis-23038/
whens the last time you did a tune up ?
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