Injectors not firing!!?? tpi swap
#51
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Car: 91' Firebird SOLD
Engine: 350 TPI +bolt-ons
Transmission: 700r4
Axle/Gears: 3:42
Re: Injectors not firing!!?? tpi swap
So car was originally an 89 tbi and u started using a 92 tbi engine and harness? When u go to tpi ,u need to repin the harness at the ecm.There are also some changes u need to make at the C100 connector for speedometer to work.
#52
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
No I'm using a 92 ecm/harness... The original car was totaled and was a auto... The owner swapped everything into a 89 t5 tbi shell. So I'm guessing that's why the nss is there ?? Ran fine with tbi which was all 92 and the speedo is Manual... Grr I'm so close to going back to it
Last edited by Chris_89rs; 10-28-2012 at 08:46 PM. Reason: **
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Car: 91' Firebird SOLD
Engine: 350 TPI +bolt-ons
Transmission: 700r4
Axle/Gears: 3:42
Re: Injectors not firing!!?? tpi swap
No I'm using a 92 ecm/harness... The original car was totaled and was a auto... The owner swapped everything into a 89 t5 tbi shell. So I'm guessing that's why the nss is there ?? Ran fine with tbi which was all 92 and the speedo is Manual... Grr I'm so close to going back to it
#55
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
Yeah it's a 730 ecm , everything came off a factory Camaro harness tpi heads and ecm what's the re pin for ??
#56
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
My speedo works it's cable driven
#57
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Car: 91' Firebird SOLD
Engine: 350 TPI +bolt-ons
Transmission: 700r4
Axle/Gears: 3:42
Re: Injectors not firing!!?? tpi swap
Ok, wasnt sure if you actually replaced the harness with a 90-92 one
#58
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Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
would the 12v i was giving the pin for vats mess up the ecm?well what i did not thinking right, ,i traced the orange wire running from the vats fuse and at the c207 connector plugged it into the vats wire (blue) coming out of the ecm? I get no crank but i did buy a ignition switch ?
#59
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
friday i will be putting a good day worth of work into it, I'll be back then! thanks again everyone! I'll be sure to make a nice video when shes running again!
#61
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Engine: LB9 5.0 (lt1 cam)full exhaust..
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Axle/Gears: 9 bolt, 3.27's
#62
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Re: Injectors not firing!!?? tpi swap
Ok guys update .... Cleaned the grounds installed the ground strap .. Changed the prom into new ecm.. Fuel pump primed... Same problem .. Found out my starter is crapping out ... Any ideas !!???!!!!!
#63
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
am i missing something ???
also while i'm cranking it over the fuel pump kicks on as it should it started up but with starting fluid again
grounds are good??
also while i'm cranking it over the fuel pump kicks on as it should it started up but with starting fluid again
grounds are good??
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
ok guys this is where I'm at... its driving me crazy !!!
#65
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Re: Injectors not firing!!?? tpi swap
http://www.youtube.com/watch?v=BXxqAX8Mw0U&feature=plcp
ok guys this is where I'm at... its driving me crazy !!!
ok guys this is where I'm at... its driving me crazy !!!
You should hook one side to 12V and the other to the wire going to the ECM (you should be able to get both of these signals from one unplugged injector connector with the key on. You should see the light flash as you crank the engine over.
Have you checked all of your injector's resistance with an ohm meter?
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
Ok I have 12 v going to the injector ground and with a noid light I get nothing ??
#67
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Re: Injectors not firing!!?? tpi swap
I'm not sure what exactly you have, but hook one end of the noid light into the injector plug and the other end to the other connector in the same injector plug. You should get flashes when cranking. Keep a close eye on your fuses for the injectors.
Keep in mind that the ECM grounds the injectors, it doesn't switch a +12V signal to them. That means that all the injectors have 12V power going to on pin in the connector whenever the key is on (and the fuses are good). The other pin will switch between floating (no connection to anything, but will appear to have 12V present because the voltage is passing thru the coils of the injectors that are plugged in) and being grounded when the ECM wants the injector on. Unplug all injectors to eliminate the other paths for 12V to flow around on, at least while testing right now. No need to push gas into the engine by inadvertantly providing a ground path thru the noid light for the injectors to turn on.
Keep in mind that the ECM grounds the injectors, it doesn't switch a +12V signal to them. That means that all the injectors have 12V power going to on pin in the connector whenever the key is on (and the fuses are good). The other pin will switch between floating (no connection to anything, but will appear to have 12V present because the voltage is passing thru the coils of the injectors that are plugged in) and being grounded when the ECM wants the injector on. Unplug all injectors to eliminate the other paths for 12V to flow around on, at least while testing right now. No need to push gas into the engine by inadvertantly providing a ground path thru the noid light for the injectors to turn on.
Last edited by afremont; 11-04-2012 at 03:07 PM.
#68
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Car: 89 Camaro R.S.
Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
when i tested the ground, i had all injectors un plugged .. when I put a noid light to it nothing happens... when i check the ground wires to the injector (green/blue) i use a 12v test light .. it lights up with the key on off and stays on with the key in start .. but when any injector is plugged in the light turns off????
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Engine: LB9 5.0 (lt1 cam)full exhaust..
Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
this is a video of the car starting with a little starting fluid
#70
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Re: Injectors not firing!!?? tpi swap
when i tested the ground, i had all injectors un plugged .. when I put a noid light to it nothing happens... when i check the ground wires to the injector (green/blue) i use a 12v test light .. it lights up with the key on off and stays on with the key in start .. but when any injector is plugged in the light turns off????
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Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
Ok the injector plug marks 12 v when all injectors are disconnected but when the key moves to the run position it won't light up the noid light ??? Unless I manually ground the noid this is with the key on and off
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Re: Injectors not firing!!?? tpi swap
Ok checked pluse and hot in run ill be posting more videos
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Re: Injectors not firing!!?? tpi swap
ok I got some video ...
and another
and one more
another
another
another
last one
and another
and one more
another
another
last one
#74
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Re: Injectors not firing!!?? tpi swap
everything seems to be fine?
#75
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Re: Injectors not firing!!?? tpi swap
update on my car !!! I was probing it with the test light hooked to 12 to the injector just for kicks and as i turned the car over it started to flash!!
i then heard a pop as if the engine was trying to start ... i then hook up my noid light in to one of the injector plugs and cranked the motor and again it flashed !!?? i plugged the injector back up and tried cranking it nothing but that pop again so i hooked up the ses light to see if it worked and it did (using my noid light) lol and then i grounded the test terminal and just got a 12 over and over... I stopped the ecm test and tried starting her up and she would start but die out soon after?? battery was going dead?
i then heard a pop as if the engine was trying to start ... i then hook up my noid light in to one of the injector plugs and cranked the motor and again it flashed !!?? i plugged the injector back up and tried cranking it nothing but that pop again so i hooked up the ses light to see if it worked and it did (using my noid light) lol and then i grounded the test terminal and just got a 12 over and over... I stopped the ecm test and tried starting her up and she would start but die out soon after?? battery was going dead?
#76
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Transmission: WC T-5 pro5.0 shifter zoom S/s
Axle/Gears: 9 bolt, 3.27's
Re: Injectors not firing!!?? tpi swap
Got it to idle !!! Map didn't have the hose connected ! Thanks everybody vids up soon
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Car: 92 Firebird, 77 Trans Am SE, 86 Z28
Engine: 5.7 HSR, T/A 6.6, empty
Transmission: T-5, TH350, T-5
Axle/Gears: 3.08 posi, 3.23 posi, 3.23
Re: Injectors not firing!!?? tpi swap
yes, speed density uses a MAP sensor. It would have manifold vacuum attached to the sensor with a very short elbow from the factory. The MAP is on the passenger side of the plenum towards the back. The vacuum 'line' is only a couple inches long. It is little more than a couple inches long
#81
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Car: 92 Firebird, 77 Trans Am SE, 86 Z28
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Re: Injectors not firing!!?? tpi swap
yes, speed density uses a MAP sensor. It would have manifold vacuum attached to the sensor with a very short elbow from the factory. The MAP is on the passenger side of the plenum towards the back. The vacuum 'line' is only a couple inches long. It is honestly just a short rubber elbow tube
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