tach bouncing, 06 f150

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warbat66

Member - Posts: 11

Joined: August 01, 2007

Location: United States

Posted: August 01, 2007 at 1:28 PM / IP Logged

I am having problems with my 06 f150. I installed two amps a 300 watt pioneer and a 800 watt rockford. The rockford is powering a alpine type r 10 and the pioneer is powering my door speakers. The problem i am having is that my tach is bouning up and down when i come to stop light or stop sign. Im assuming that i am putting too much of a drain on the alternator, but my lights are not dimming. Will a capaciter help? should i take out the pioneer amp? any help would be great. Thanks

xtremej

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Joined: February 24, 2006

Location: United States

Posted: August 01, 2007 at 1:37 PM / IP Logged

Need more info. Is the actual engine reving up or is just the tach needle moving? Specs power cable size, ground size, and model numbers of the amps you have? Factory head unit or aftermarket?

audiomaninc

Copper - Posts: 108

Joined: April 18, 2007

Location: United States

Posted: August 01, 2007 at 1:48 PM / IP Logged

Sounds like it could be a bad battery. Take the truck to your local Advance Auto, or Auto Zone, or whatever you have in your area and have them do a load test on the battery and the alternator. Make sure your stereo is on and thumping when they do this. We had this exact problem about a month ago with a Grand Cherokee, turns out the battery was weak so we ended up selling him a new one and voila, problem solved! Good luck!

2003 Dodge Neon R/T

Alpine CDA9813, RF T2000.1bd, RF T162S, RFT142C, RF T600.4, RF T215D4

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warbat66

Member - Posts: 11

Joined: August 01, 2007

Location: United States

Posted: August 01, 2007 at 2:46 PM / IP Logged

xtremej wrote:

Need more info. Is the actual engine reving up or is just the tach needle moving? Specs power cable size, ground size, and model numbers of the amps you have? Factory head unit or aftermarket?

no the engine is not reving its just the tach. all the cables are #4. the head unit is a pioneer 7700mp. Not sure about the model numbers for the amps. The rockford is a few years old. the pioneer is their bottom end 300 watt amp.

Thanks audiomaniac ill give that a try.

any other ideas?

xtremej

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Joined: February 24, 2006

Location: United States

Posted: August 01, 2007 at 2:54 PM / IP Logged

double check connections also, was the ehad unit installed at the same time the problem occured.

warbat66

Member - Posts: 11

Joined: August 01, 2007

Location: United States

Posted: August 01, 2007 at 5:06 PM / IP Logged

no the head unit has been in since i first got the truck about 10 months ago. i did not have the problem with the pioneer amp and a kicker comp 10. it all started when i took out the kicker sub and added the rockford amp and the type-r 10. Will taking out the pioneer amp help? a friend who is a professional installer is totally stumped. The truck has a 130 amp alternator. It is definately the system though because when i turn everything off the tach stops moving.

i am an idiot

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Joined: September 21, 2006

Location: Louisiana, United States

Posted: August 01, 2007 at 9:18 PM / IP Logged

If everything was fine till the Rockford amp, why would you think taking the Pioneer amp would fix the problem? If you take the fuse out of the power wire for the Rockford, does it still do it? Does the tach bounce with the beat of the music or is it just a random bounce?

warbat66

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Joined: August 01, 2007

Location: United States

Posted: August 01, 2007 at 9:52 PM / IP Logged

its just a random bounce, i was thinking by taking out the pioneer amp i would lessen the load on the alternator, an without the rockford the tach does not bounce.

01trublugt

Copper - Posts: 112

Joined: January 08, 2007

Location: United States

Posted: August 02, 2007 at 8:38 AM / IP Logged

How much of a bounce are we talking about here? Does it go from say at idle 800 up to 1000 or from like an idle of 800 up to 1500??

warbat66

Member - Posts: 11

Joined: August 01, 2007

Location: United States

Posted: August 02, 2007 at 9:14 AM / IP Logged

it drops to around 700 up to 1300 with out the stereo it has a constant idle of around 1000 or 1100

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