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Technical => Engine Tech => Topic started by: atengnr on March 28, 2016, 05:17:56 PM

Title: 84 3.8L - Engine Races in Wet Weather
Post by: atengnr on March 28, 2016, 05:17:56 PM
Hey have 84 Tbird with 3.8L, 71K miles.  When in the rain or at car wash, engine will race intermittently whether driving or idling. Any thoughts as to the cause??  Thanks.
Title: 84 3.8L - Engine Races in Wet Weather
Post by: JeremyB on March 28, 2016, 05:32:21 PM
My first though is a TPS or ISC failure that is moisture induced. Could be an open circuit in the harness that moisture shorts out. Have you checked for KOEO and KOER codes? Might narrow down to TPS or ISC.
Title: 84 3.8L - Engine Races in Wet Weather
Post by: jpc647 on March 29, 2016, 08:42:05 AM
Agreed, next time it's raining and it's racing, use the paperclip trick to pull codes. My guess is the tps, but the readout should tell you.
Title: 84 3.8L - Engine Races in Wet Weather
Post by: atengnr on April 05, 2016, 06:01:46 PM
Hi, thanks.  How do I check codes on this car?  It doesnt have an amber light as I recall.  Thanks alot.
Title: 84 3.8L - Engine Races in Wet Weather
Post by: softtouch on April 05, 2016, 07:32:27 PM
You don't have a check engine light
Code definitions here: http://www.thorssell.net/hbook/2digit.html

Here you go:
Title: 84 3.8L - Engine Races in Wet Weather
Post by: atengnr on April 05, 2016, 10:14:16 PM
Quote from: softtouch;454670
You don't have a check engine light
Code definitions here: http://www.thorssell.net/hbook/2digit.html

Here you go:


Thanks alot.
Title: 84 3.8L - Engine Races in Wet Weather
Post by: Haystack on April 06, 2016, 02:37:59 AM
Here's a YouTube of me running codes on my car. Takes all of 5 mins.
Koer test 1987 tbird: http://youtu.be/9QSiS6wf7oU
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