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Old 11-02-2015, 08:17 PM   #1
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Winnebago Owners Club
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Location: Independence, Ks
Posts: 20
454 TBI running ruff

I have a 1996 Georgie Boy Pursuit on 1995 chassis.
Took a trip last week and the check engine light came on and it started running bad on acceleration, it will cruise right alone until accelerate.Stopped by O'Riellys , they checked the OBD-1 code and it was 36, ignition trouble.
I took out the ignition module and it tested ok.
It doesn't back fire, it acts like it misfires or doesn't get fuel on one bank, the motor seem to rock, I drove it with doghouse removed.
Does anybody have any ideas? I check all the vacuum line.


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Old 11-02-2015, 08:27 PM   #2
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Location: Southern NM
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you could pull the spark plugs and see if one cylinder is missing,

Also maybe post this in the Chevy Workhorse section

Workhorse and Chevrolet Chassis Motorhome Forum - iRV2 Forums

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W22 Workhorse Chassis 8.1 Flat Towing a 82 Jeep CJ7
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Old 11-03-2015, 06:33 AM   #3
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Don't even consider the information O'reilly gave you. You need the year and vin code number to properly define the code. Your coach might be built on a 1995 chassis. I think for '96 and beyond the GM codes start with a "P".
For 1993-95 your vin would contain an "N". My 1993 454 starts 1GBKP37N and code 36 indicates Auxilliary Idle Air Control Valve, which could be caused a bad AIAC valve, wiring or vacuum lines.
The codes only give you a starting place to help in the diagnosis. You can usually detect a bad sensor with a volt/ohm meter. The sensors are actually very reliable, the only engine sensor that has ever failed on mine is the coolant sensor and the engine has 200k miles.
Kevin n Chriss
2015 Newmar 3103 Bay Star -The Pay Car-
1993 Fleetwood 28T Bounder -The Flounder-
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Old 11-03-2015, 12:22 PM   #4
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Here's a fun thing to do -- play with a running engine. So, it rocks a bit. Is it a rythmic miss (pop,pop,pop,pop) or an arythmic miss (pop,POPpity,POP,pittypooopp). If it's rythmic, it is one cylinder missing all the time (Probably ignition or mechanical). If it's arythmic, it's many cylinders missing some of the time (probably fuel/air). If it's rythmic, fire up the motor, pull the doghouse, locate the distributor cap. Ok, here's the fun part -- reach in there and pull a plug wire from the distributor cap of that running motor. Does the rocking get worse? If yes, that wire/cylinder is not causing the original rock. If no, you found at least one cylinder that is not firing for some reason, now stick the wire back on and do the next one until you've gone all the way around. MAybe put some tape on that bad wire so you remember which one it was. There may be more than one bad cylinder. When you're pulling the wire, make sure the rest of your body is not touching a ground, and before you start the motor, pull and replace each wire to make the removal easier when the motor is running. THis also ensures the wires are in, and the distributor cap is tight. Takes about a six pack to do all eight.
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Old 11-03-2015, 03:08 PM   #5
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Think I have my problem solved.
I did have a vacuum leak at the actuator, hose off, the explains the code 36.
Had a bad plug wire, the end at the plug had separated from the clip.
I haven't driven it yet but it is running smooth.

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