tach for remote start

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gregbbb

Copper - Posts: 82

Joined: February 22, 2008

Location: Minnesota, United States

Posted: February 22, 2011 at 2:10 AM / IP Logged

Can a fuel injector be a unreliable sorce of tach?

I just installed a viper 5901 in a 2010 ford edge and I used the uncomon non blue wire of the fuel injector

for my tach. The viper programed right up and all was good started great untill the next day the car would start

for a bit then shut off I tried to reprogram the tach learn and this time that wouldnt work so I switched to voltage sence

and the car started right up go figure?

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Mike M2

Platinum - Posts: 2,652

Joined: June 29, 2005

Location: United States

Posted: February 22, 2011 at 6:32 AM / IP Logged

Tho it is a pulsed output, i have found they just don't always work(my own Dodge Caravan for example). It is the wire Directechs calls for...

Mike M2

Tech Manager

CS Dealer Services

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howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: February 22, 2011 at 7:29 AM / IP Logged

Any one tried either crankshaft or camshaft positional sensor at the engine management, or the best place, tach at the gauges if it is wired i.e. non data.

Thank goodness BMW and Toyota/Lexus give you a wire on the diagnostic socket (OBD 11)

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tedmond

Gold - Posts: 4,610

This member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.

Joined: January 06, 2007

Location: Ontario, Canada

Posted: February 23, 2011 at 9:05 AM / IP Logged

hey howie, i have used a crankshaft position sensor before. i got the compustar to program tach when the car was running, but it would never rs.

Ted

2nd Year Tier 1 Medical School

Still installing as a hobby...pays for groceries

Compustar Expert

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howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: February 23, 2011 at 11:08 AM / IP Logged

I prefer the back of the tachometer except most modern cars have a chip for the instrument panel and tach is multiplexed with other functions, I've had slight grief with VW and Euro GM, their (very similar) systems don't seem to like injector pulse pick ups, they then get rough idling and pick-up and/or stalling.

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tach for remote start

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