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Old 09-25-2012, 12:21 PM   #1
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Location: McCormick, SC
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Question OBD Location? 1990 Tiffin

I recently purchased a 1990 Allegro 34' Basement - I have since with enough $$$ and sweat equity gotten it in pretty good shape mechanically - cosmetically it is very good.

A few weeks ago I started getting a check engine light after it runs for 30 minutes or more. No performance problems just an annoyance at this point.


I started researching and found this is OBDI not 2 so scanner of no use. That wouldn't be a problem if I could find the %@!*&%% odb connector.

Looked all around the under dash and have found all number of harness and connectors but nothing that looks like an obd port. Called a Tiffin dealer and they confirmed it should be inside somewhere. I did lift the doghouse briefly last night but did not see anything obvious - I really didn't look too hard.

This is a P-30 chassis, chev 454 tbi, anyone got an idea where it is? I haven't found the PCM either are they both under the doghouse? I used to think myself pretty handy with a wrench - getting a bit more 'chronologically enhanced' nowadays - are my eyes just that bad? LOL

Thanks in advance.

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Old 09-25-2012, 01:01 PM   #2
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If it's carbureted, it probably doesn't have one. I think they didn't start putting those ports until they went EFI.
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