CAJones
Member
- Joined
- Oct 28, 2018
- Messages
- 52
- Reaction score
- 2
- Points
- 8
- Location
- Seattle, Washington
- Vehicle Year
- 1997
- Make / Model
- Ford
- Engine Type
- 2.3 (4 Cylinder)
- Transmission
- Manual
- 2WD / 4WD
- 2WD
Edit: this has been a fascinating journey into the world of DIY engine rebuilding solely from the internet.
1997 Ranger with 150k on a rebuilt engine
Code 0171 and 0420 (420 code is old)
I noticed the truck having a hard time starting, I ran two errands (20 miles of driving) and on the way back home it starting running really rough and lost some engine power. Since the CEL was already on, I plugged my scanner in and code 0171 popped up. Don't know when it turned on as the CEL was already on.
Symptoms:
Blew air (my mouth) into the throttle body and found air coming out IAC. Apparently this is a one way valve that only allows air out when the pressure increases in the throttle body. This is according to WVE, the company that I bought the IAC from on RockAuto.com.
Live data says that the short term and long term fuel trims are high (40%)
Sometimes stalls at idle unless I give a bit of gas, you can hear it about to die
Hard time starting, but has started every time so far I have been troubleshooting/learning
Hooked a vacuum gauge up the port to the brake booster:
-At idle the vacuum gauge reads 13 in. Hg and bounces very quickly up and down 2 in Hg
-Engine smoothes out when I increase RPMs to 2,000 and the vacuum increases to a steadier 16 in Hg +/- 0.5 in Hg.
I Googled vacuum gauge readings explained and the worn valve guide is what closely matches my experience.
Any advice on what to check/do to see if that is indeed a worn valve guide? Or is it something else?
1997 Ranger with 150k on a rebuilt engine
Code 0171 and 0420 (420 code is old)
I noticed the truck having a hard time starting, I ran two errands (20 miles of driving) and on the way back home it starting running really rough and lost some engine power. Since the CEL was already on, I plugged my scanner in and code 0171 popped up. Don't know when it turned on as the CEL was already on.
Symptoms:
Blew air (my mouth) into the throttle body and found air coming out IAC. Apparently this is a one way valve that only allows air out when the pressure increases in the throttle body. This is according to WVE, the company that I bought the IAC from on RockAuto.com.
Live data says that the short term and long term fuel trims are high (40%)
Sometimes stalls at idle unless I give a bit of gas, you can hear it about to die
Hard time starting, but has started every time so far I have been troubleshooting/learning
Hooked a vacuum gauge up the port to the brake booster:
-At idle the vacuum gauge reads 13 in. Hg and bounces very quickly up and down 2 in Hg
-Engine smoothes out when I increase RPMs to 2,000 and the vacuum increases to a steadier 16 in Hg +/- 0.5 in Hg.
I Googled vacuum gauge readings explained and the worn valve guide is what closely matches my experience.
Any advice on what to check/do to see if that is indeed a worn valve guide? Or is it something else?
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