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Old 06-24-2017, 10:38 PM   #1 (permalink)
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Exclamation 1.3L Idle Issue--High and Surging

Hello, I am brand new to this forum, but after doing a build with my buddy on his Astro Van, I know how helpful forums can be. Recently, we just purchased a 1994 Samurai. The PO put a lot additions and accessories on it, and it seems to be in very good condition-- no leaks, no rust, tight suspension, drivetrain seems to be strong, and it runs perfectly. When its hot. Everytime I start it up cold, it idles really high and continues to do so for about 5 minutes, and then it surges back and forth from a high idle to a slower, ideal idle speed as far as I can tell. After that, it goes until it reaches operating temperature and then it slows down and purrs like a kitten. I want to get to work adding more cool stuff onto it, but I would like to iron this problem out so I know how much I can spend on other stuff. I have very limited experience in this area of troubleshooting, so my first idea was to replace the O2 sensor, but I figured I'd let people with more experience chime in first. Any help would be appreciated!
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Old 06-25-2017, 03:49 PM   #2 (permalink)
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Typical cause of surging idle is a miss adjusted TPS..

Do not throw any unnecessary parts.. (O2), until you test..

... Philip
.... Philip

92 Ford Explorer, 450k
97 Ford Explorer, 400k
99 Tracker, 4dr, 4x4, 2L DOHC, auto 265k
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