edgar3o9

Hi guys i have a 2000 Mustang GT and i have some rpm problems. Whenever Im driving and about to make a stop, the rpms suddendly drop to the point that it turns off. I took it to firestone and they told me it was a gas leak on a pcv hose on the throttle body, the weirdest thing is that it didn't use to do that before i had it. Before all these i had some problems with a p0171 code. Could you all tell me what to check or inspect for? Thank you

95gtconvert

check in the section for your model but if you ask me it sounds like a tps sensor or fuel filter needs to be changed

but in order to be sure go to the 96-04 section of the forum

99GTvert

Moving to tech....

WhiteFoxGT

its neither one of these

you have a 171 code, so you have a lean code. which indicates a vacuum leak. Which if severe enough will cause stalling issues. Get the leak resolved, and have the KAM reset so your fuel tables go back to normal