HD Forums - Topic - Tach problems

STOP FIREWORKS

	HavasuDoug.com :: HD Forums an online boating community Sponsor of the Month: GlassMan

Latest Posts:

7-22-2026 Three Word Post.....The Next Generation.... (Rep.#20,238) from: GoFastRacer

7-22-2026 The Totally Useless Thread IV (Rep.#409) from: GoFastRacer

7-22-2026 Brrrr (Rep.#15,161) from: GoFastRacer

7-22-2026 Gas price in your area (Rep.#7,437) from: GoFastRacer

6-07-2026 Getting back into Ham Radio (Rep.#6) from: Carrera Elite

Welcome Guest
[ Log In :: Register ]

Home » HD Forums » Forums » Tow Vehicles » Tach problems

No members are browsing this topic

Forum Led by: Scuba Steve, Ziggy

[ Track this topic :: Email this topic :: Print this topic ]

Topic: Tach problems

< Next Oldest | Next Newest >

weldwade

Scorpio
HDF Bronze Supporter

Boat Racer
500 post flame

Tucson Az
Posts: 950
APPD 0.12
Post Rank: 42
207 LS Reinell

Posted: Mar. 15 2006,7:57 am

Post # 1

The tach in my truck seems to have a mind of its own. Its a 03 Chevy 6.6 Duramax. Most of the time it reads from 2500 to 4500 even at idle. Does anyone know if there is a tach pickup or sending unit? the needle drops to zero when the key is off so its not stuck. :banghead

Keep your GUNS!

| Member # 1517 | Joined: 6-19-2005 |

MrCord

Libra
HDF Silver Supporter

In need of a River Trip!
1,000 post flame

Irvine Ca
Posts: 2,179
APPD 0.28
Post Rank: 30
28' Magic H-Deck

Posted: Mar. 15 2006,9:48 am

Post # 2

Yikes... Any warranty left???

When I have a wireing problem, I just run new wires in the boat.. With a wire harness on a new vehicle, who knows???

Good luck! :good

My Googles for wireing diagrams were not sucsessful

Never Trust Anyone That Talks Too Fast.... They are hoping you miss something!

| Member # 1117 | Joined: 3-01-2005 |

Sleek-Jet

Aquarius
HDF Supporter

The Cooler

Batavia, IL
Posts: 6,351
APPD 0.74
Post Rank: 11
Big 'Ole Inner-tube

Posted: Mar. 15 2006,10:25 am

Post # 3

Took care of that for you McCord...

Wade, doesn't the tach drive off a pully??? Might just be a loose connector under the hood.

A dog doesn't care if you're rich or poor, educated or illiterate, clever or dull. Give him your heart and he will give you his.

| Member # 81 | Joined: 2-07-2003 |

weldwade

Scorpio
HDF Bronze Supporter

Boat Racer
500 post flame

Tucson Az
Posts: 950
APPD 0.12
Post Rank: 42
207 LS Reinell

Posted: Mar. 15 2006,10:41 am

Post # 4

Quote (Sleek-Jet @ Mar. 15 2006,10:25 am)

Took care of that for you McCord...

Wade, doesn't the tach drive off a pully??? Ã‚Â Might just be a loose connector under the hood.

Fock, I don't know. I've been trying to find info on it for a week. I guess I'm going to have to take it to someone, hopefully not the dealer. :beat

Keep your GUNS!

| Member # 1517 | Joined: 6-19-2005 |

MrCord

Libra
HDF Silver Supporter

In need of a River Trip!
1,000 post flame

Irvine Ca
Posts: 2,179
APPD 0.28
Post Rank: 30
28' Magic H-Deck

Posted: Mar. 15 2006,10:43 am

Post # 5

Quote (Sleek-Jet @ Mar. 15 2006,10:25 am)

Took care of that for you McCord...

Wade, doesn't the tach drive off a pully??? Ã‚Â Might just be a loose connector under the hood.

Thank ya

Never Trust Anyone That Talks Too Fast.... They are hoping you miss something!

| Member # 1117 | Joined: 3-01-2005 |

BigDog

Not Float'n Enuff

Phoenix, AZ
Posts: 25,698
APPD 3.34
Post Rank: 3
'99 Searay 210 Sundeck

Posted: Mar. 15 2006,11:30 am

Post # 6

Just guessing here but doesn't the computer have something to do with the cluster readings including the tach?? I know when my '02 fuel guage would fluctuate from full to empty and everthing in between they replaced the complete cluster.

Just thinking out load here. :stupid

| Member # 1527 | Joined: 6-23-2005 |

Carrera Elite Male

Libra
HDF Supporter

Glendale,AZ
Posts: 44,134
APPD 5.11
Post Rank: 2
1990 Carrera 23.5 Classic

Posted: Mar. 15 2006,12:02 pm

Post # 7

The older GM diesels tach ran off of the alternator some how, but I'm not too sure how they drive them on the newer ones. I have a call out to see if I can find any more info for you.....

Sarcasim, Just one more thing that I offer for free!!
I've Reached The Age Where Happy Hour Is A Nap!!

WWW.StormPokerRuns.Com

| Member # 8 | Joined: 12-04-2002 |

Carrera Elite Male

Libra
HDF Supporter

Glendale,AZ
Posts: 44,134
APPD 5.11
Post Rank: 2
1990 Carrera 23.5 Classic

Posted: Mar. 15 2006,12:13 pm

Post # 8

According to your discription, they are telling me that it sounds like a bad cluster. It seems to be a common problem. They said that a rebuilt cluster should be around $325.

Edited by Carrera Elite on Mar. 15 2006,12:13 pm

Sarcasim, Just one more thing that I offer for free!!
I've Reached The Age Where Happy Hour Is A Nap!!

WWW.StormPokerRuns.Com

| Member # 8 | Joined: 12-04-2002 |

weldwade

Scorpio
HDF Bronze Supporter

Boat Racer
500 post flame

Tucson Az
Posts: 950
APPD 0.12
Post Rank: 42
207 LS Reinell

Posted: Mar. 15 2006,12:31 pm

Post # 9

Quote (Carrera Elite @ Mar. 15 2006,12:02 pm)

The older GM diesels tach ran off of the alternator some how, but I'm not too sure how they drive them on the newer ones. I have a call out to see if I can find any more info for you.....

Yep, found that out with my Dads 93 6.5, long story short a larger alt pully really focks up your tach.

Keep your GUNS!

| Member # 1517 | Joined: 6-19-2005 |

weldwade

Scorpio
HDF Bronze Supporter

Boat Racer
500 post flame

Tucson Az
Posts: 950
APPD 0.12
Post Rank: 42
207 LS Reinell

Posted: Mar. 15 2006,12:32 pm

Post # 10

Quote (Carrera Elite @ Mar. 15 2006,12:13 pm)

According to your discription, they are telling me that it sounds like a bad cluster. It seems to be a common problem. They said that a rebuilt cluster should be around $325.

Thanks CE, can I buy one or is it a dealer only item?

Keep your GUNS!

| Member # 1517 | Joined: 6-19-2005 |

Carrera Elite Male

Libra
HDF Supporter

Glendale,AZ
Posts: 44,134
APPD 5.11
Post Rank: 2
1990 Carrera 23.5 Classic

Posted: Mar. 15 2006,12:36 pm

Post # 11

They Suggested Dicks Speed-O-Tach
(602)279-6463
4325 N.7th st.
Phx

Sarcasim, Just one more thing that I offer for free!!
I've Reached The Age Where Happy Hour Is A Nap!!

WWW.StormPokerRuns.Com

| Member # 8 | Joined: 12-04-2002 |

weldwade

Scorpio
HDF Bronze Supporter

Boat Racer
500 post flame

Tucson Az
Posts: 950
APPD 0.12
Post Rank: 42
207 LS Reinell

Posted: Mar. 16 2006,9:21 am

Post # 12

Thanks for the info CE, I will give them a call. :phone

Keep your GUNS!

| Member # 1517 | Joined: 6-19-2005 |

GoFastRacer Male

HDF Supporter

V-Driver For Life!

Big River, Ca
Posts: 63,269
APPD 7.40
Post Rank: 1
Spectra20

Posted: Mar. 17 2006,4:53 am

Post # 13

Why don't you just put an Autometer in!??.. :stupid

| Member # 101 | Joined: 3-03-2003 |

weldwade

Scorpio
HDF Bronze Supporter

Boat Racer
500 post flame

Tucson Az
Posts: 950
APPD 0.12
Post Rank: 42
207 LS Reinell

Posted: Mar. 17 2006,5:04 am

Post # 14

Quote (GoFastRacer @ Mar. 17 2006,4:53 am)

Why don't you just put an Autometer in!??.. :stupid

I have been told that the autometer tach for diesel applications is not as accurate as it should be. I really dont know I have never used one on a diesel. The same guy told me that the pickup the tach used also quit working more than once. I called a place here in Tucson yesterday and the place CE recommended and they both said they can fix it, I am going to go that route this time.

Keep your GUNS!

| Member # 1517 | Joined: 6-19-2005 |

Carrera Elite Male

Libra
HDF Supporter

Glendale,AZ
Posts: 44,134
APPD 5.11
Post Rank: 2
1990 Carrera 23.5 Classic

Posted: Mar. 17 2006,7:00 am

Post # 15

COOL!! Glad you found a place a little closer!!

Sarcasim, Just one more thing that I offer for free!!
I've Reached The Age Where Happy Hour Is A Nap!!

WWW.StormPokerRuns.Com

| Member # 8 | Joined: 12-04-2002 |

weldwade

Scorpio
HDF Bronze Supporter

Boat Racer
500 post flame

Tucson Az
Posts: 950
APPD 0.12
Post Rank: 42
207 LS Reinell

Posted: Mar. 17 2006,9:15 am

Post # 16

Quote (Carrera Elite @ Mar. 17 2006,7:00 am)

COOL!! Glad you found a place a little closer!!

Dick's was familiar with the problem and told me that they have fixed many, common prob with POS GM electronics. I'm going to have them do the job, thanks again CE. :good

Keep your GUNS!

| Member # 1517 | Joined: 6-19-2005 |

Carrera Elite Male

Libra
HDF Supporter

Glendale,AZ
Posts: 44,134
APPD 5.11
Post Rank: 2
1990 Carrera 23.5 Classic

Posted: Mar. 17 2006,9:24 am

Post # 17

They have fixed a few for athe place a friend of mine works, so far so good....

Sarcasim, Just one more thing that I offer for free!!
I've Reached The Age Where Happy Hour Is A Nap!!

WWW.StormPokerRuns.Com

| Member # 8 | Joined: 12-04-2002 |

GoFastRacer Male

HDF Supporter

V-Driver For Life!

Big River, Ca
Posts: 63,269
APPD 7.40
Post Rank: 1
Spectra20

Posted: Mar. 18 2006,5:58 am

Post # 18

Quote (weldwade @ Mar. 17 2006,6:04 am)

Quote (GoFastRacer @ Mar. 17 2006,4:53 am)

Why don't you just put an Autometer in!??.. :stupid

Well the tach don't know what it's on, it has to be the electronics that it's connected to not giving a good signal!.. :stupid

| Member # 101 | Joined: 3-03-2003 |

wakemaker

Libra

Boater

nuevo ca/topock az
Posts: 177
APPD 0.02
Post Rank: 114
22" Tahoe deck boat 222 5.0

Posted: Mar. 18 2006,10:01 pm

Post # 19

probably the cluster there about $295.00 maybe able to do better than that, but you will need a dealer with a tech 2 to
diagnose it cause it's all controlled by the pcm.

Have I passed you on the river?

| Member # 118 | Joined: 3-16-2003 |

18 replies since Mar. 15 2006,7:57 am

< Next Oldest | Next Newest >

[ Track this topic :: Email this topic :: Print this topic ]

Home » HD Forums » Forums » Tow Vehicles » Tach problems

The Colorado River WebRing
[ Join Now \| Ring Hub \| Random \| << Prev \| Next >> ]

Please help keep HDF free. If you enjoy this site, feel free to make a donation to keep it running. THANKS!