Car won 't stay started after thermostat replace. Idles really fast...Help!!!!

2003 BUICK RENDEZVOUS
10,000 MILES
Avatar
SARAHJANE
  • MEMBER
  • 1 POST
Took off throttle body to replace thermostat and now the car won't stay started. We replaced the air mass flow sensor. Without plugging the wires in the sensor the car stays started but stays in a fast idle. When we plug the wires in the car shuts off and won't stay started.
Apr 16, 2012 at 12:04 PM
Advertisement
Avatar
HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
check to see if you screwed up the throttle body gsket and is givin g you a vacuum leak. also check the line for the pcv valve, thosea re plastic and tend to break. then run a scan instead of replacing parts to see what's screwed up. Also if your duct work has ahole in it from maf to tbi then it won't run either.
Apr 18, 2019 at 6:52 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle