Tach Drops to Zero??
Thread Starter
Racer
Joined: Nov 2005
Posts: 272
Likes: 13
From: Sarasota, FL
Tach Drops to Zero??
I've noticed when i'm driving down the highway occasionally i'll be rolling along at the usual 2k rpm or whatever it's at then all of a sudden it drops to 0 for five or six seconds. Any Thoughts???
Team Owner
Joined: Jan 2007
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From: cookeville tennessee
Melting Slicks
Joined: Jul 2004
Posts: 3,294
Likes: 480
From: Brea CA
I had a similar situation after removing the cluster to add gauge bezels. Had to pull it out again and reseat the main connector. I found that when I put it together after adding the bezels I had twisted the cable around a bit. Untwisting it before reinstalling so far has corrected the issue. YMMV.
Gary
Gary
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Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I had a similar situation after removing the cluster to add gauge bezels. Had to pull it out again and reseat the main connector. I found that when I put it together after adding the bezels I had twisted the cable around a bit. Untwisting it before reinstalling so far has corrected the issue. YMMV.
Gary
Gary
That would be the first place to look. Make SURE that all the IPC boards and connections are clean, tight and properly seated in their connectors:
Heres a couple post that will help you with the IPC:
- C5 Gage Cluster disassembly - http://forums.corvetteforum.com/c5-t...post1570380674
- C5 Gage Cluster Post - http://forums.corvetteforum.com/c5-t...post1570380878
Disassemble the door wiring harness connectors and make sure that the female pins in the power plug are not spread and bent. Loose connections there can cause the serial digital data buss to have all sorts of wieird issues.
Thread Starter
Racer
Joined: Nov 2005
Posts: 272
Likes: 13
From: Sarasota, FL
Cleaned all grounds...none of them looked bad at all....still have the problem. I'm starting to think my PCM might be going bad. I need to replace my DIC buttons (Stopped working) to see if it's tripping any codes I guess.
Advanced
Joined: Dec 2011
Posts: 78
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From: Porter Texas
I've had the same issue as you. Tach started dropping to zero on occasion and is now almost always at zero. I was told by corvettes of houston that it may be due to the fact that the original battery leaked acid down onto the harness. Not sure if thats the same in your case? And I honestly don't know if that's the problem in my case or not (although I know it would cause all kinds of havoc) I still need to clean grounds and double check pins etc.