Question about 1987 Chevrolet Corvette

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Corvette engine turns over but will not fire

I have an 87 Corvette with a 5.7 and tuned port. Engine will turn over fine, has 45-50 psi at the fuel line, a new cap and rotor and tests to have plenty of spark. If I disconnect the battery for a couple minutes to clear codes it will run for 2-5 seconds and quit. If you turn the key to run but do not try to start it, something above the intake manifold clicks repeatedly and the SES light seems to blink in tandem. The fan will then run as if it is in limp. If you try to crank it at this point it will not fire. When I short AB on the diagnostic center I get a code 12 and that's it even after trying to crank it for several turns. (because I'm clearing them I'm sure) It ran fine until one day I left, went about a block and it quit, I cranked on it until it started and went a few miles and it quit again. This time it would not even run and had to be towed home. Any help would be appreciated.

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12 is no distributer pulses that's expected...if no other codes are present check the computer box located under pass side kick panel. Because it is mounted up side down I have seen the controller eeprom that's supposed to be latched in its socket fall out to vibration this sounds like the ecm.....remember you will get spark because that is a separate module in the hei unit hope it helps

Posted on Nov 26, 2013

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Inquire in your country what code 12 is, I am betting it is you BCM thinking that your car is stolen, If so the only answer is in a GM analizer or a new BCM which the codes to make it work are in the same GM workshop

Posted on Nov 26, 2013

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Posted on Jan 02, 2017

  • 4 Answers

SOURCE: Hard Start with trouble code 32

You should have your battery checked, it may be getting old and doesn;t have as much cold cranking power, I don;t think code 32 has anything to do with the slow cranking when cold.


Trouble Code 32 indicates that the Exhaust Gas Recirculation (EGR) valve diaphragm is not where the ECM expects it to be. The ECM controls the diaphragm with a Pulse-Width Modulated (PWM) waveform. The EGR has a vacuum bleed solenoid that adjusts the vacuum applied to the EGR valve based on this pulse width. If there is sufficient vacuum at the EGR valve, a switch closes to send a signal back to the ECM. The absence of this signal is the bases for code 32.
The conditions for setting this code are:

  • no vacuum to EGR (switch open), and
  • Code 33 or 34 (MAF error) is not present, and
  • engine running and LV8 is less than 100, and
  • coolant temperature is > 118 deg F (48 deg C), and
  • the EGR solenoid duty cycle is < 65%, and
  • the above conditions are met for more than 25 seconds


Typical causes for this code include:
1) Faulty EGR valve-to-ECM connection
2) Plugged EGR passages and/or sticking EGR valve
3) Defective EGR valve
4) Defective ECM

Posted on Jan 05, 2009

  • 10 Answers

SOURCE: 1998 chevy c15 5.7 SFI SYSTEM

My truck did this after I replaced the fuel pump. Turned out to Fuel Pressure Regulator. It would crank and crank but never start. It's located underneath the black plastic manifold on the side of the injectors.

Posted on Feb 19, 2010

cooter_01
  • 43 Answers

SOURCE: 2002 Chevy Express 2500, 5.0. Cranks but won't

FUEL PRESSURE MUST BE 62 LBS. OR GREATER OR IT WILL NOT GROUND INJECTORS, IF ITS OK THEN CHECK YOUR GRAY 12V SUPPLY TO PUMP AT CRANK-UP, YOU MAY HAVE A POOR IGNITION SWITCH.

Posted on Nov 26, 2010

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