just but my corvette back together cranks but wont start no fuel no spark
need help

 

What did you do to it?

First thing to check would be ground wires - If I recall, the 3 most common missed are the 2 on the block, and one on the back of the head on the driver's side.

The driver's side head one broke on mine when we did my cam swap, and sure enough, cranks, but no start. Fixed it, and bam, fired right up.

 

im getting a message on my dash said reduce engine power?does any one have a wiring diagram for the engine?

 

READ AND POST DTCs!

 

By back together again mean that you had pulled the engine? By your post that you have no gas or spark would leave me to believe that you do not have a good ground connection to the engine since fuel injectors and coil packs will not work if that is the case. As advised on previous post check that specific ground point that was mentioned. Good Luck

 

AND...tell us what you did to it. What did you put back together? We can tell you what grounds you may have missed and along with other things.

 

I check and sanded the ground the two on the side chassis right and left i cant locate the other two.does anyone know where the grounds are located.I had a scanner and its not reading it.I check every plug to make sure they are plug in.i had the car running 5 months ago and had to remove the engine and had frame work done to the car. Cranks but dosnt start no spark or fuel.Dont know what else to do.

 

scanner,,,,You dont need no stinking scanner!


READING YOUR Engine Diagnostic Codes (DTCs)
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 etc…)
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.

Here is very good site of DTC definitions:


http://www.gearchatter.com


Make sure to include the H or C suffix!!

 

check all grounds and tested wiring and i got power to injectors but no fuel and spark.I found a wire that is black and white that has current dont no where it goes its not a ground , towards the back of the motor. those any one know where it goes.i thought it was a ground but it burnd fuse when i ground it.

 

LMAO Does it look like this?





If it does,, it the ground wires for the coils and injectors and it bo;ts to the back of the head at G 106.

BC

 

it does why is it popping the fuse

 

how can i check for spark on the spark plugs

 

that wire would that cause the injectors not to work

 

yes!!

 

Sigh...if he had read post 2 - that was what I first suggested...hope that is it. Always check the grounds first - I learned that by searching and reading Bill's numerous posts about it. ;-)

 

In the trunk passenger side I have extra wire near the tail lights do you know where it goes. Thanks very much for your help