Hudy Posted January 3, 2022 Share Posted January 3, 2022 On 12/28/2021 at 1:08 PM, Ωhm said: Couple of could be's. Leaky Fuel Pressure Regulator (FPR). Check for fuel in vacuum line. Slow leak. O2S Heater circuit. O2S is a maintenance item. Replace ≈87.5kmiles. Did you check these items yet? My crank issue was the FPR. I was also running super rich until a couple days ago and found a faulty O2 sensor. Use an analog multimeter to measure the output. Dan Link to comment Share on other sites More sharing options...
oleskool Posted January 6, 2022 Author Share Posted January 6, 2022 On 1/3/2022 at 10:20 AM, Hudy said: Did you check these items yet? My crank issue was the FPR. I was also running super rich until a couple days ago and found a faulty O2 sensor. Use an analog multimeter to measure the output. Dan All have been checked and verified but for a disclaimer the truck has been running perfect for days with no cold start up issues what so ever haha. I need it to have the issue again sadly to re-measure all the sensors with a voltmeter to better understand what is happening. Right now everything checks out 100% good Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now