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culprits for 113 code 200 1991

For the first time my 91 245 had the check engine light come on. Prior to the light coming on it was running very sluggish with a low idle, almost like it was not getting enough gas. Thanks to the 700/900 faq list, I was able to find out how to pull a code and got 113. I have already checked the line going to the fuel pressure regulator. It did have a faint smell of gas but not much. Could it be the fpr, O2 sensor, or ? Any ideas would be appreciated. Thanks, George








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    culprits for 113 code 200 1991

    When I had an O2 sensor go bad pretty sure it throw a 1-1-3 code. It was also burning very rich.








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      culprits for 113 code 200 1991

      checked the O2 sensor voltage to ground with car running and at operating temp. i did see the voltage change up and down .1 to .8 volts. revved engine to 1500 rpm and still saw change, but not the expected 8 'trips' in 10 seconds per the dynamic test. much slower in my case. possibly my volt meter not reading fast enough? took ground screws loose on intake manifold for ECU and Fuel System. cleaned all surfaces and replaced. checked fuel system fuse (inside car), seemed good but replaced anyway. contacts clean. checked injector contacts. measured resistance across terminals for each injector - all same, about 16.1 ohms. checked AMM - terminal 1 to ground is 0 ohms. good. checked terminal 3 voltage with engine running 2.36 volts. good. still getting code 113, occured between each item check. drove to gas station to fill up. engine nice and warm and engine is now idling steady at 1200 rpm. when cold, the engine was hunting. still getting code 113 after about 10 minutes of operation. engine bogs slightly from idle to acceleration. any more thoughts appreciated.








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    culprits for 113 code 200 1991

    Before even thinking of changing any parts, remove, clean, and reset the grounds for the ECU and Fuel System. These are the two nuts on top of the intake manifold with black wires underneath. Clear the codes and see if they reset.

    Did you pull any other codes? The system will store the last three set. Just repeat the process for the first code pull to get the rest.

    Most likely there will also be 113 and 232 which do not set the light but are stored.

    I think some year around yours the system fuse was changed from a blade type on the left fender well besdie the battery to inside the vehicle. Depending, you will want to clean that fuse as well. If you do ot get full juice, even a good ground will not allow the injctors to function properly.

    Since the fuel system controls everthing electrically operated by providing power at all times then interupting the ground to pulse the injectors, or control any other device for engine speed control. A good ground is imperative to reliable operation.

    System grounds consist of steel bolts with an alloy terminal on an aluminum structure. All expand and contract at different rates in response to temp changes and any moisture/air that gets in between will accelerate oxidation that acts as an insulator.

    If after cleaning the grounds the code returns, check each injector with an ohm meter. It is possible that just puilling the connector and resetting it on each injector may correct a poor conductive connection.

    Duane








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      culprits for 113 code 200 1991

      Thanks Duane. It only pulled the 113. I retested it and it came up 113 again.


      I really didn't want to just start throwing parts at it. So I will get on your suggestions in the morning. It will be a great way to end the year. Cheers, George







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