So I haven't tried to start the vette in a few weeks, and when I went out to the garage this morning to take it to work, it wouldn't start. Symptoms seem like no spark, or no fuel, but I doubt the latter. Any ideas on how to troubleshoot? I'd rather not have it towed to the shop.

-Keith

 

Do you mean that it doesn't crank or it cranks but won't fire up?

 

It cranks fine. Just no fire!

 

R U 100% certain the battery is fully charged?
Can you by chance hear the fuel pump engage?

 

Here are a few simple things that will help up figure out what is happening:

Read and post your DTC using the DIC to read them:

Once you have then read and written down, clear ALL the DTCs.

Use a Volt Meter the read the battery terminals before and during cranking. Post the voltages that you see before & during cranking

Listen closely when you insert the key in the ignition and turn the ignition to ON. You should hear the fuel pump run for 1-2 seconds as it charges up the fuel system. The sound will come from the rear compartent. It will be a wherrr sound.


If you remove ONE spark plug boot from each bank, insert a phillips screw driver into the boot, hold it approx 1/4" from a good solid engine ground and see if you get a spark when you crank it over.

Try all of that and post your results. If you going to ask "How do I read my DTC"s ,, here is a good link:

These are the absolute best C5 Diagnostic Trouble Code (DTC) web sites!!!

http://www.corvettedoctor.com/Code_Main.html
http://www.corvettedoctor.com/index.html


Go to “technical data base” and then to “Corvette ECM Computer Codes”. Then select your year car. Read the instructions and then scroll down to the "READ MORE" window to view the code definitions.\

Here is another very good site:

http://www.obd-codes.com/trouble_cod...d-ii-codes.php

Make sure to include the H or C suffix!!


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. (i.e. door open, trunk open ect)
3) Press and hold OPTIONS
4) While holding OPTIONS, press FUEL four times within a 10-second period.

Initially, on-board diagnostics go into an Automatic Mode which shows diagnostic codes in a pre-set sequence: PCM - TCS - RTD - BCM - IPC - RADIO - HVAC - LDCM - RDCM - SCM - RFA. All codes will be displayed for each. ( i.e. PCM = 4 codes)
If none are present in a given module, you will see No More Codes on the display.
There are two kinds of diagnostic codes, Current and History designated with a letter suffix, C or ;H. A current code indicates a malfunction is present in the module displaying data. A history code indicates a problem existed sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it's potential evidence of a previous problem, now resolved, that was not removed by clearing the codes.
More likely it's an indication of an intermittent malfunction.
Intermittent codes are the most challenging of the diagnostics. An intermittent code may have happened once, may have happened more than once but is inconsistent or may be happening on a regular basis but not at the time the codes are displayed. History codes can also be caused by a current malfunction in a system that is not operating at the time codes are displayed. An example is the rear window defogger which doesn't operate until the Body Control Module detects engine rpm. For history codes set by a module 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 system has displayed all modules, it goes into the manual mode which allows selection of each module using combinations of Driver Information Center buttons. Manual mode can also be entered during the automatic sequence by pressing any button except E/M. Once the display shows Manual Diagnostics, select a module by pressing the OPTIONS button to go forward or the TRIP button to go back. Once a module is selected, a code is displayed, and if more than one are present;
press GAGES to go forward or FUEL to go back.
To exit the diagnostic mode at any time, press E/M. If you want to erase codes in a given module, press RESET
To reset the codes once in manual mode, press and hold RESET until it displays NO CODES Press OPTIONS to go to the next module. Repeat the steps until you have reset the codes in all the computer modules.
NOTE!! Only reset the codes IF you want to - it is NOT necessary to do this. Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory. If you clear the code/s, and extinguish the Check Engine Light, your emissions status ready will NOT allow you to pass an emissions test until you have completed the required driving cycles.
Once you have the codes, the next question is: What to do with the information?
First, consult the factory service manual. Any serious C5 Do-It-Yourself owner should invest in the Corvette Service Manual of the appropriate model year. The Service Manual is really a requirement if you want to understand and work on your C5.


Hope this helps ya! DONT call that wrecker!!! We will get you back on the road!

BC

 

Thanks Bill, I'll start with that.

 

well, I didn't have any DTC codes. A few BCM codes in the history, but I did find the problem none the less. The fuse in the MSD Boost a pump was blown. Replaced the 30A fuse, and it fired right up.

Thanks for the help!