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4wd High
Joined: Oct 2022
Posts: 9
Likes: 0
Send Help!
During first 10 minutes of cranking the truck surges, lunges while stopped, idles poorly, has a general loss of power.
After it warms up for 10 minutes the problems totally stops and the truck drives great.
I finally got a code obd1 172-Lean 02 Sensor, but it only throws the code if I’ve been driving for a while and on the interstate. My thought is it is a fuel issue, below are the numbers, both tanks gave very close numbers within 1psi:
Warm Up 10 minutes
KOEO-30
Running-33
with Vac line pulled-40
truck has been running for 10 and warmed up
KOEO-39
Running-40
with Vac line pulled-40
Truck is a 1997 Fordf250HD 351 Windsor. Does this every time, not intermittently.
Why would there be such a difference in pressure based on truck running for 10 minutes. Any help is appreciated.
After it warms up for 10 minutes the problems totally stops and the truck drives great.
I finally got a code obd1 172-Lean 02 Sensor, but it only throws the code if I’ve been driving for a while and on the interstate. My thought is it is a fuel issue, below are the numbers, both tanks gave very close numbers within 1psi:
Warm Up 10 minutes
KOEO-30
Running-33
with Vac line pulled-40
truck has been running for 10 and warmed up
KOEO-39
Running-40
with Vac line pulled-40
Truck is a 1997 Fordf250HD 351 Windsor. Does this every time, not intermittently.
Why would there be such a difference in pressure based on truck running for 10 minutes. Any help is appreciated.
Thread Starter
|
4wd High
Joined: Oct 2022
Posts: 9
Likes: 0
tried this, no smell and no gas. Will try the fuse.
Logistics Pro
Joined: Nov 2013
Posts: 3,928
Likes: 1,199
From: Mojave, Ca
Check for vacuum leaks very carefully, especially at the pcv valve, vacuum reservoir, and brake booster connection. I bet you're gunna find a split hose. How is your EGR and smog pump system? You can use a mighty-vac pump to check the operations of the valves and make sure they're not stuck wide open.
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