LS1 no injector firing?

[EagleMark]

Trying to get a 2004 GTO 5.7L LS engine running on aftermarket harness to 12200411 PCM and a 2002 Camaro starter bin.
EDIT: Owner says motor is early or 2003 motor and has 24 tooth Crank Trigger Wheel. 2004 was supposed to change to 58 tooth.

First things checked were Orange wires to PCM and all good at 12 volt. Next up was Pink/Black wires with Key On and all were good at 12 volts except C1 Pin 61 shows no volts?

Traced the wire to CMP and looked up on wiring as CMP Sensor Low Reference. What is voltage supposed to be here?

Voltage at CMP is Red 12 volts, Pink/Black 0 volts and Brown/White signal 0 volts key on.

If this is not the issue can someone walk me through or has diagnostic sheet for no injector firing? Or possibly the 2004 GTO motor not same as 2002 Camaro calibration?

[mecanicman]

Shoot me a email address and Ill send you the wiring diagrams and gm trouble shooting. Picked the cable up today, thanks for the invoice, made it easy for me.

[mecanicman]

Got them uploaded, if you need more let me know.

[mecanicman]

I see after that you are using a camaro o/s and this is for gto. I can get the camaro if you would like. Also, all 2004 gto are 24x. The 2005 ls2 was also to begin with, not sure on the cutoff, 2006 was all 58x. If you can confirm its a 5.7 than it is for sure 24x.

[Munchies]

Are you getting spark?

[Buzz]

... First things checked were Orange wires to PCM and all good at 12 volt. Next up was Pink/Black wires with Key On and all were good at 12 volts except C1 Pin 61 shows no volts?

Traced the wire to CMP and looked up on wiring as CMP Sensor Low Reference. What is voltage supposed to be here?

Voltage at CMP is Red 12 volts, Pink/Black 0 volts and Brown/White signal 0 volts key on.

C1 (Blue) pin 61 is the CMP ground - should not be any voltage on this circuit when unplugged from the sensor to check continuity / voltage.

If this is not the issue can someone walk me through or has diagnostic sheet for no injector firing?

Most of the time this is either a VATS issue, or a problem with the wiring harness. Have seen some aftermarket wiring harnesses with the CMP pins inserted into wrong cavities of the CMP plug.

Or possibly the 2004 GTO motor not same as 2002 Camaro calibration?

The calibrations are different - injector flow will need to be altered slightly, as will the VE / MAF - but these are not so different as to prevent a startup - it just may not run optimally.

I have any and all pinouts and schematics you may need - just let me know what would be of assistance, or those that you are missing.

[EagleMark]

Are you getting spark?

Yup, spark on all 8.

[EagleMark]

C1 (Blue) pin 61 is the CMP ground - should not be any voltage on this circuit when unplugged from the sensor to check continuity / voltage.



Most of the time this is either a VATS issue, or a problem with the wiring harness. Have seen some aftermarket wiring harnesses with the CMP pins inserted into wrong cavities of the CMP plug.



The calibrations are different - injector flow will need to be altered slightly, as will the VE / MAF - but these are not so different as to prevent a startup - it just may not run optimally.

I have any and all pinouts and schematics you may need - just let me know what would be of assistance, or those that you are missing.

Thanks Buzz. The Pink/Black really confused me there.

[EagleMark]

Got them uploaded, if you need more let me know.

Thanks mecanicman. I'll look through these and let you and Buzz know if this can't find the issue.

I did all I could with just tuning equipment and they had a test light and cheap DVM. Today I will bring my O scope along with supplied test sheets.

[Lextech]

The 24x engines have a Black CKP sensor and the 58x engines have a GRAY CKP sensor. I know a mismatch will not run but, I don't know exactly what all doesn't work right (Spark > Fuel > Or both).

Jeff

[mecanicman]

The 24x engines have a Black CKP sensor and the 58x engines have a GRAY CKP sensor. I know a mismatch will not run but, I don't know exactly what all doesn't work right (Spark > Fuel > Or both).

Jeff

The 04 gto engine is basicly an ls6. It was never made with 58x, nor was any 5.7 ls engine. Your ckp sensor data is one way to tell, but if it has the cam sensor at the back of the intake that is another. Only way for this to be a 58x engine is to be a 6.0 if it is in fact a gto engine.

[Lextech]

The 04 gto engine is basicly an ls6. It was never made with 58x, nor was any 5.7 ls engine. Your ckp sensor data is one way to tell, but if it has the cam sensor at the back of the intake that is another. Only way for this to be a 58x engine is to be a 6.0 if it is in fact a gto engine.

Exactly Right. The reason I brought up the CKP sensor colors is due to the easy interchangeability of these LS/Gen3/Gen4 parts. When working on someone elses project, you don't always know exactly what you have.

Jeff

[mecanicman]

Exactly Right. The reason I brought up the CKP sensor colors is due to the easy interchangeability of these LS/Gen3/Gen4 parts. When working on someone elses project, you don't always know exactly what you have.

Jeff

good point

[S10LS]

See the list I posted below

[S10LS]

http://forum.efilive.com/attachment....0&d=1363970440 Sorry try this link instead. All 05-06 Ls2 gto are 24x. They use the E40 ecm which can only run a 24x reluctor engine.