LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

DTC Map 33

Old 04-11-2017, 12:18 PM
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DTC Map 33

Keep getting dtc 33 when I put my car into gear. Can somebody review my data log and tell me what's going on? Posted in computer diagnostics and tuning last week but didn't get to far there. This data log is from today, you can review last weeks post titled DATA LOG if you'd like to look at my log from last week and review what's already been discussed.
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Old 04-11-2017, 05:50 PM
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Re: DTC Map 33

One thing I just noticed on my log is when DTC 33 appears on data log my ignition voltage drops from 13.2v to 12v. Would that cause the trouble code?
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Old 04-11-2017, 08:52 PM
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Re: DTC Map 33

I was going to take a look the new log, but since you apparently aren't satisfied with the effort I spent trying to help you in the previous post, I'm not sure what more I can add. I told you I'm not a tuner and not really familiar w/ S/C applications.
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Old 04-11-2017, 09:04 PM
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Re: DTC Map 33

No I appreciate your time and knowledge. I figured your a busy man and didn't want to keep bothering you. Any help from you would greatly be appreciated. Didn't seem like many people visited the other forum so I thought I'd repost with new data in what seemed to be more frequented forum. Did not mean to offend you.
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Old 04-12-2017, 08:27 PM
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Re: DTC Map 33

Any luck Injuneer? What about voltage drop from 13.2 to 12 when code is detected after putting vehicle into gear? Alternater regulated no good?
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Old 04-14-2017, 09:58 PM
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Re: DTC Map 33

Is anybody going to help? I can't believe people are so sensitive. I asked for help and in a reasonable amount of time. Not 3 or 4 days later. I understand things come up but at least keep a person updated. Again all I wanted was some help, I followed all the rules but obviously was wrong for posting in a another thread looking for more people to share some knowledge.
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Old 04-14-2017, 10:13 PM
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Re: DTC Map 33

I haven't read the other post but what is happening is that the manifold vacuum is above 80 kPa at idle for more than a second. The scan log shows that almost all the time. Is it due to the S/C system? ... probably. If it bothers you, have that code programmed out of the pcm.
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Old 04-14-2017, 10:51 PM
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Re: DTC Map 33

Thanks for the reply Gary, would that be causing the car to stall?
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