new here, my name is nicole and i currently own a 2002 5 speed mustang gt.
she was an auction find, had 134k miles when i bought her now has 145k.
my issue is, when i cold start the engine, it’ll idle high then drop, idle high then drop. the rpms get up to a grand, then drop to a little under 500 almost seeming like it’s about to stall, this cycle continues until the engine is warmed up.
once the engine warms up, the rpms rest at 600/700 (as it should).
it still boggles my mind why every time the rpms fluctuate so drastically from a cold start, it’s a little frustrating.
i experienced this same issue when i first got the car, so i replaced the plugs and coils and it fixed the problem.
i just really hope it’s not a misfire or anything along those lines.
given the circumstances, i’m leaning towards either a vacuum leak or IAC valve.
any suggestions would be helpful and i would really appreciate it!
she was an auction find, had 134k miles when i bought her now has 145k.
my issue is, when i cold start the engine, it’ll idle high then drop, idle high then drop. the rpms get up to a grand, then drop to a little under 500 almost seeming like it’s about to stall, this cycle continues until the engine is warmed up.
once the engine warms up, the rpms rest at 600/700 (as it should).
it still boggles my mind why every time the rpms fluctuate so drastically from a cold start, it’s a little frustrating.
i experienced this same issue when i first got the car, so i replaced the plugs and coils and it fixed the problem.
i just really hope it’s not a misfire or anything along those lines.
given the circumstances, i’m leaning towards either a vacuum leak or IAC valve.
any suggestions would be helpful and i would really appreciate it!