haveing some trouble with my 2003 zo6. it starts runs for a second then dies.
has fuel pressure
has spark
security light never comes on, i think it should come on at some point during start up then go off, mine never comes on at all.

somebody help me out before i hang myself!!!


thanks shawn

 

codes?

 

no codes

 

Do you know how to check it for codes ?

The IPC display, the 20-character, vacuum florescent screen above the steering column that says "Corvette by Chevrolet" every time you turn on the key, is a powerful device. DIY Service Techs are going to be most interested in the IPC's ability to show diagnostic trouble codes (DTC) for all the modules that transmit them.
The "diagnostic display" mode is entered with the following procedure:
1. Turn on the ignition but don't start the engine.
2. Press the "reset" button to turn off any warning messages
3. Press and hold "options" and
4. While holding "options", press "fuel" four times within a 10-second period.
Inititially, the on-board diagnostics go into the "automatic" mode which shows each module's DTCs in a pre-set sequence:
• 10 PCM Powertrain Control Module page 6-357 - 6-361
• 28 TCS Traction Control system ABS on page 5-86
• ?? RTD Real Time damping page 3-136 (I do not have this option)
• 40 BCM Body Control Module page 8-405 UTD Page 8-727
• 60 IPC Instrument Panel Cluster page 8-508
• 80 radio page 8-213
• 99 HVAC Heater Vent-Air Conditioning page 1-118
• A0 LDCM Left Door Control module page 8-904 to 8-951
• A1 RDCM Right Door Control Module page 8-904 to 8-951
• AC SCM Seat Control module page 8-1064 -8-1082
• B0 RFA Remote Function Actuation page 8-676
For each module, all DTCs will be displayed. If none are present in a module, you will see "no more codes" on the ICP display.
There are two kinds of DTCs, "Current" and "History," designated with a letter suffix, "C" or "H". A current code indicates that the malfunction is present in the system whose module is displaying data. A history code indicates a problem existed in that module sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it is possible it's evidence of a previous problem, now solved, that was not removed by clearing codes. More likely is that a history code indicates an intermittent malfunction. "Intermittents" are the most challenging DTCs. An intermittent may have happened only once, may have happened more than once but is inconsistent in its appearance or may be happening on a regular basis but not at the time the IPC is displaying codes. History codes can also be caused by a current malfunction in a system that is not operating at the time DTCs are displayed. An example is the rear window defogger which doesn¹t operate until the BCM detects engine rpm. For history codes set by a system that does not operate with the key on and engine off, a special diagnostic tool called a "scan tester" is necessary to properly diagnose the malfunction.
Once the IPC has displayed all 11 modules, the system goes into the manual mode which allows selection of each module using combinations of DIC buttons. The manual mode can also be entered at any time during the automatic sequence by pressing any button except "E/M". Once the IPC displays "manual diagnostics," you may select a particular module by pressing the "options" button to go forward or the "trip" button to go back. Once a system is selected and a DTC is displayed, if more than one are present; press "gages" to move forward or "fuel" to go back.
To exit the diagnostic mode at any time, press "E/M". If you want to erase or "clear" codes, press "reset." Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory.

 

yes , i know how to check codes. i have a scan tool. there are no codes, present or history.
the thing is that the security light does not come on at all. it should come on at some point, i think. it is the only thing i can think of that is shutting the car off, like maybe turning the injecters off. the car will run if you spray starting fluid into the intake.

is there a fuse to the security module or something?

thanks shawn

 

Just because you have a cheap scan tool, does not mean that it will pick up all of the codes.

Unless you have a Tech2, you're not going to get all of the codes.

The security light problem could be a column lock problem.

Do you have column lock installed ? What year car and transmission (auto or manual) do you have ?

 

Does it die just sitting there ideling or when you move?

 

it is a tech 2 , not a cheap tool.
dont not have a colum lock installed. you can hear the colum lock operate, and it is not locking the steering wheel.
as it says in the top post it is a 2003 zo6


it will not idel, starts and dies right away.

 

If is dies right away You have another issue, something not setting codes. I you "suspect" fuel pump 1st. Get a fuel pressure guage on it and let's see what that tells us.

 

Well if you got a Tech2, then you should be able to check your fuel pressure pretty easily.

Yeah I know the Tech2 is not a cheap tool as I have one myself.

Did you check for water over by the BCM and Passenger fuse box ? My bro's Z06 had a similar problem when the blower motor went and it started dripping water all over the BCM.

 

i check the fuel pressure it does not drop off when the car dies. 58 psi.
the bcm has not been wet.

i still think security. maybe turning injecters off. because you can make it run off starting fluid. just not sure.

thanks shawn

 

You got the best diagnostic tool there is! Can you access the passkey feature via the tech 2? I also think the dead security light is not a good sign. Usually blinks when a door is open, and it does come on with ignition then goes off.

 

i will have to check the pass key with the scan tool. just need to figure out why no security light, i think that is where the problem is. need to no why it does not light up.

thanks shawn

 

Have you ran a check on your BCM. The BCM and the PCM talk to each other.

Also have you tried jiggling the according wire package in your doors to see if you're getting shorted out there ?

I would also check my ground wires and the engine ground straps by the drivers side and behind the cylinder heads.

 

Have you used the tried and true method of checking codes via the DIC? I would think with the security light not coming on and not able to even idle you would get some kind of code. B\G

 

i dont think it will run long enuff to set any codes.
pcm must be talking to the bcm because everthing thing else works.
all the grounds have been checked.

 

Had a look at the FSM, according to this wiring diagram, the passkey system is just a starter cutoff? So if it cranks then the security system is not to blame. Tho its weird the light is dead.

 

doesnt the security control more than the starter, passkey ?

thanks shawn

 

The BCM/PCM could handle the fuel cutoff, that wouldnt show on the wiring diagram. I could not find more info on the passkey system in the FSM. I will look again tonight. I know passlock system does disable PCM. Long shot, but does the pink ignition wire at the switch 12V+ even when cranking? I've had a problem with a VW at the shop once that had me puzzled for a few days. All was good but the ignition switch was faulty, there was no ignition output in the crank position!

 

This is one of those rare cases, when the person has the best troubleshooting tool, and can perform all the tests per the service manual.

Do you just not know how to use the Tech II, or do you not have a service manual?