C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

89 Wont start

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Old Oct 9, 2005 | 01:24 AM
  #1  
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From: West Windsor NJ
Default 89 Wont start

Went to start my 89 coupe after recharging the battery and nothing.
The car starts for 30 seconds if i keep my foot on the gas pedal
but then it dies. I try to crank it and it turns over but does not start
I hear the fuel pump when I turn on the ignition (2 sec) but it will not turn over. Anybody have any ideas I would appreciate them.
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Old Oct 9, 2005 | 01:44 AM
  #2  
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Use a paper clip into ALDL pins A&B to pull any codes.

Put a fuel pressure gauge onto the Schraeder valve on the fuel rail to see if the fuel rail stays charged.
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Old Oct 9, 2005 | 02:58 AM
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Pull a plug wire and hook an extra plug to it. Hold it against the block/head while someone cranks it over. With a fully charged battery you should get a bright white/blue spark. If you don't, suspect the ignition module or coils.
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Old Oct 9, 2005 | 09:17 AM
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Here's some good reading from my 86 manual.
http://members.shaw.ca/corvette86/En...ButWontRun.pdf
http://members.shaw.ca/corvette86/Fu...l%20System.pdf
http://members.shaw.ca/corvette86/Fu...mDiagnosis.pdf
http://members.shaw.ca/corvette86/Ig...System-EST.pdf
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Old Oct 9, 2005 | 10:59 AM
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Problem is either fuel pressure or MAF sensor circuit/relays. If you have good fuel pressure then disconnect MAF sensor then see if car will start.

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Old Oct 10, 2005 | 05:19 PM
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Thanks for your responses will check it out when and if it stops raining.
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Old Oct 18, 2005 | 10:24 AM
  #7  
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From: JUPITER FLORIDA
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im still having the same problem too, wont start and the fuel pressure is good. I used an ohmmeter to check my coil,
maybe some one can answer this for me. when chekcing electrical resistance, the digital ohmmeter reads 1 ohm when its just turned on. what does it mean if it does not change when you try to check the resistance of a electrical component? such as the coil? maybe biggie has the same damn problem i have.
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Old Oct 18, 2005 | 10:38 AM
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From: chandler az
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These are the exact same symptoms my car had last week when the ECM died. NAPA has Reman units for $89
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Old Oct 18, 2005 | 01:19 PM
  #9  
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From: JUPITER FLORIDA
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if your ecm dies wont it not flash any codes?
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Old Oct 18, 2005 | 02:53 PM
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From: chandler az
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Mine just flashed the 12 code over and over again.
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Old Oct 18, 2005 | 03:13 PM
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Originally Posted by cplonner
im still having the same problem too, wont start and the fuel pressure is good. I used an ohmmeter to check my coil,
maybe some one can answer this for me. when chekcing electrical resistance, the digital ohmmeter reads 1 ohm when its just turned on. what does it mean if it does not change when you try to check the resistance of a electrical component? such as the coil? maybe biggie has the same damn problem i have.
What make and model ohmeter do you own? Most digital ohmeters indicate OL (overload, or over measuring range). If the ohmeter indication doesn't change when you test a component, then that component has resistance higher than your ohmeter can measure and most likely is open circuit.
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Old Oct 19, 2005 | 09:58 AM
  #12  
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From: JUPITER FLORIDA
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Yeah i think thats exactly what it is. i think its an I for infinite not a one that im reading. I looks exaclty like a one but that would be the only thing that makes sense,.
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