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Old 05-06-2016, 01:39 PM   #1
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1988 Holiday Rambler Chevy 454 Chevy ECM?

Class A - Carbureted. Does anyone know (or have a picture) of where the ECM connector is located or what it looks like. Also my check engine light does not work. I thought locating the ECM and tracing it back to the CEL might be the easiest way to find out where the wire is cut. And although cryptic, it might be nice to see the codes.

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Old 05-07-2016, 05:33 PM   #2
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On the carb unit I don't think there is one. I have never seen one on mine.

1990 28' Georgie Boy, 454, 4bbl, Thorley Headers, Recurved Distributor, 8.75 mpg. RVM 76
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Old 05-07-2016, 05:49 PM   #3
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From fading memory (a risky proposition) if the motorhome has an oxygen sensor in the exhaust, it must have an ECM to drive the carb's mixture control solenoid. It should also have electronic sensors for other things, like manifold pressure, etc. I don't think these were used on units without catalytic converters.
2000 Holiday Rambler Endeavor 40PBD
Freightliner XC, CAT 3126B
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Old 05-07-2016, 08:15 PM   #4
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I have a 89 carbureted 454, no ecm, not cat. I think that would have came in the early 90's when fuel injection came on these
1989 Champion LaSalle 34' 454 ci always doing something to it
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Old 05-07-2016, 09:31 PM   #5
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Unless it is a California unit there is no ECM or O2 sensor, I don't know what they did in California units There is no CEL on these.
03 Silverado cclb 3500 drw, D/A, Reese 22k hitch
07 Alfa SeeYa Gold 30RL,2 slides,power everything
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454, chevy, ecm, holiday rambler

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