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05 tahoe tach wire at injector


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copout221 
Copper - Posts: 69
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Posted: February 19, 2007 at 10:43 AM / IP Logged  
 I want to find tach sens at injector due to issues with the system not always starting on first attempt and I have read to go directly to an injector to possibly correct the prob. Tech manual states "For tach can also go to any of the ignition coils or fuel injectors and use the wire that is NOT pink, black, or brown" BUT the wires at the injectors are pink and black. WHICH WIRE DO I USE ??  This is on a 2005 Tahoe with Viper 5900 and 1700g bypass. Thanks
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Hymer 
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Posted: February 19, 2007 at 10:46 AM / IP Logged  
Go to the odd colored injector wire. The best place I have found for the tach is the white behind the cluster.
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copout221 
Copper - Posts: 69
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Posted: February 19, 2007 at 10:54 AM / IP Logged  
What do you mean by ODD colored wire ? I was connected to the white behind the cluster and wanted to try this out for troubleshooting. Each injector has two wires and they are pink and black. I don't have a meter that does AC so I cannot test them.
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warpedimage3 
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Posted: February 19, 2007 at 10:57 AM / IP Logged  
Tachometer white  ac  instrument cluster, pin A5 or PCM
Notes: The PCM (Powertrain Control Module) is in the left front of the engine compartment to the left of the fan shroud. The tach wire is in the green plug, pin 10.
For tach can also go to any of the ignition coils or fuel injectors and use the wire that is NOT pink, black, or brown.

Just get it at the instrument cluster like hymer said

Hymer 
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Posted: February 19, 2007 at 11:00 AM / IP Logged  
Each of the injectors has 2 wires on it, One wire will be a common color on each of them. The white behind the cluster should work for that RS unit, you may need to set the tach threshold lower [or re-learn the tach] under a lower rpm idle. I think it sends about 800 rmp equivilent to the tach wire, then when it is colder or whatever I have seen them drop as low as 650. so re-learn the tach when it is cold out and warm the engine before you do this. that will ensure you learning a "warm idle condition" [lower RPM]
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copout221 
Copper - Posts: 69
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Posted: February 19, 2007 at 11:01 AM / IP Logged  
 Ok. I will go back to the white wire. Hopefully I can figure out what is causing this problem. Thanks
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peterubers 
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Posted: February 19, 2007 at 1:48 PM / IP Logged  

Does the car not start in extreme cold weather -- is that when the Tahoe is having remote start problems on the first try?

I'm having similar issues on a 1997 Maxima, and I'm thinking now that since I'm using Tach sensing mode w/ the wire connected to the ECM tach signial -- perhaps I should just go straight to an injector wire.

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Twelvoltz 
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Posted: February 19, 2007 at 2:11 PM / IP Logged  
OK, this may open me up for some flaming, but I will say it anyway. Using the DEI product(I am sure it is true of other brands too but I can only speak of DEI) your truck does not need a tach wire connection. Set your unit for voltage sensing, set the voltage sensing to low (options 3-2 and 3-6) and set your crank time (option 3-5) to two seconds. Your truck's computer will prevent the starter from over cranking.
Yes, on MOST vehicles the tachometer is the best way to go, but with your truck the vehicle takes over.
To the Nissan reference, you should be using a tachometer connection or injector...but to not starting in extreme cold..did you hook up both starter wires?
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dcman41 
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Posted: February 19, 2007 at 3:07 PM / IP Logged  
heres how you check, look at the injector wire on each injector there will be one of the same colors. Say each injector has a black(common) youll want to use the wire that changes color(s) on every injector. Hope that helps
dcman41 
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Posted: February 19, 2007 at 3:17 PM / IP Logged  
peterubers as for your maxima, it is not the remote start i am a maxima enthusiast and know everything about them. The problem your having is motor related. start by cleaning your throttle body, and changing the engine coolant temperature sensor. Or bring it to the dealer i repeat it is not a problem with the remote start. This is the most common problems on a 95~99 maxima. All that is required to fix it is a bit of basic maitenance.
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