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cold start injector

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Old Apr 29, 2009 | 09:25 AM
  #1  
3rdgengmachine's Avatar
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From: Inez kentucky
Car: 87 iroc z
Engine: 358 tpi
Transmission: 700r4 with transpack
Axle/Gears: 3.42 with powertrax
cold start injector

i noticed that when i started my car first time in the morning it would take a several cranks i figuard it was the cold start injector so iv got it apart and yep when i hit the key it dosent shoot any fuel.anyone have any ideas about what i could do to fix it or what senoser tells it to work also does the car use this for an inrichment shot like a carb has a pumpshot

Last edited by 3rdgengmachine; Apr 29, 2009 at 11:25 AM.
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Old Apr 29, 2009 | 12:39 PM
  #2  
Synful's Avatar
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From: California
Re: cold start injector

first things first.

remove the electrical connector and test it with a voltmeter to make sure you're getting 12 volts to it.

if you are then you probably need a new injector if you aren't then we can go from there
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Old Apr 29, 2009 | 03:34 PM
  #3  
3rdgengmachine's Avatar
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From: Inez kentucky
Car: 87 iroc z
Engine: 358 tpi
Transmission: 700r4 with transpack
Axle/Gears: 3.42 with powertrax
Re: cold start injector

i checked for voltage as soon as i turend the key on cold and got none i also checked the injector and it was good 4 ohms resistance and also ran 12v to it and it shot out fuel.
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Old Apr 29, 2009 | 03:58 PM
  #4  
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From: VA , SP
Re: cold start injector

Originally Posted by 3rdgengmachine
i checked for voltage as soon as i turend the key on cold and got none i also checked the injector and it was good 4 ohms resistance and also ran 12v to it and it shot out fuel.

IIRC there's a switch to activate the Cold Start Injector , near the Coolant Sensor , in the intake mainfold.


ACDELCO Part # 212312
rockauto.com p/n : 14084318
http://info.rockauto.com/ACDelco/Det...ml?212-312.jpg

It's f*cking expensive....

Greets

Last edited by iroc_valencia; Apr 29, 2009 at 04:05 PM.
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Old Apr 29, 2009 | 04:07 PM
  #5  
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From: VA , SP
Re: cold start injector

I was fighting with CSI too .
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Old Apr 29, 2009 | 04:16 PM
  #6  
3rdgengmachine's Avatar
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From: Inez kentucky
Car: 87 iroc z
Engine: 358 tpi
Transmission: 700r4 with transpack
Axle/Gears: 3.42 with powertrax
Re: cold start injector

i have 2 there which one.one plug looks like the one on the injector the other is just a flat one also how expesive lol and did it fix yours ahhh ok i see it now

Last edited by 3rdgengmachine; Apr 29, 2009 at 04:24 PM.
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Old Apr 29, 2009 | 05:01 PM
  #7  
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From: Mentone, CA
Car: 91 Z28
Engine: 355
Transmission: 5 speed
Axle/Gears: 10 bolt 3.73's
Re: cold start injector

It's the one with a plug like the plug for the injector.
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Old Apr 30, 2009 | 01:53 AM
  #8  
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Re: cold start injector

Originally Posted by CBR1000RR
It's the one with a plug like the plug for the injector.


My brain remember 3 things threaded into intake mainfold:

- Coolant Temperature Sensor (yellow and black wires)
- Fitting for hoses
- Cold Start Injector Switch

Greets
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Old Apr 30, 2009 | 04:22 PM
  #9  
3rdgengmachine's Avatar
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Joined: May 2004
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From: Inez kentucky
Car: 87 iroc z
Engine: 358 tpi
Transmission: 700r4 with transpack
Axle/Gears: 3.42 with powertrax
Re: cold start injector

i cant find a listing for that sensor what do you call it and when you replaced yours did it fix it
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Old May 1, 2009 | 11:25 AM
  #10  
1986tpiiroc's Avatar
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From: South Florida
Car: 1986 IROC-Z
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: Dont know yet
Re: cold start injector

Just bought mine from Bennett Auto, cost was 88 Bucks. The price actually went down from what it was a month ago. They wanted 109. Thats still a bit hi imo for something that tells the 9th injector to pulse.
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Old May 2, 2009 | 12:50 PM
  #11  
3rdgengmachine's Avatar
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From: Inez kentucky
Car: 87 iroc z
Engine: 358 tpi
Transmission: 700r4 with transpack
Axle/Gears: 3.42 with powertrax
Re: cold start injector

yea the only place i can find one so far is napa for $70 plus tax.But I was going to as a favor if you dont mind so i can maybe save 80 bucks.If you can easily get to the sensor could you remove it put an ohm meter on it and set it to 200 and put it in a pan of boiling water and see how long it takes to change the reading.when its cold mine is reading 33.4 and when i put it in boiling water it takes about 28 to 30 seconds to change to around 66.3 or so.i noticed on the sensor its a bosch and it says "35 degrees c 8 sec" so im assuming it should only take about 8 sec to change insted of 30.If you could check that new one id be very greatful but if its a bitch to get to i understand but try it on the old one if you still got it and see what it says.Thanks alot man....ohh yea i keep saying sensor but its a switch lol
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Old May 2, 2009 | 08:54 PM
  #12  
1986tpiiroc's Avatar
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From: South Florida
Car: 1986 IROC-Z
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: Dont know yet
Re: cold start injector

Alright, as soon as I have a chance I will do that for you. Just got my mini starter for my car to solve that damn heat stroke problem ive been having. Have to change the starter, cts and cold start switch.
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Old May 2, 2009 | 09:54 PM
  #13  
rgarcia63's Avatar
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Joined: Jan 2003
Posts: 2,133
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From: Houston, Texas
Car: 88' IROCZ
Engine: 388 TPI Motown 350 Race block
Transmission: 700R4
Axle/Gears: 2.77
Re: cold start injector

If it sprayed fuel when powered direct then, it's the crank fuse, or cold start temperature switch. That and the injector are the only things in the cold start circuit.
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