Forums/Z31P/z31-repairs-forums engine-mechanical/Engine cranks but won't start, completely frustrated.
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mprice7725: (2017-10-04 22:57:16)
The car turns over very strongly but won't start.
Some background, 1987 2+2 N/A 155,000 miles. some mods but not crazy. Bought it from a family member 12 years ago with 96,000 miles on it. It's been my weekend autocross baby for 10 years NEVER a problem! Never failed to start or run strong. several weeks ago i took it out to the store, parked it for about an hour and when i tried to start her up she would only turn over but no cough no sputter, nothing. I felt it was a fuel or electric or both issue. After about 30 min she started and i was able to get her home. I have now changed out the following parts to try and fix my baby, the ignition coil and replaced the ECU with a spare, still no start. Today i dropped the tank (not easy) and replaced the 30 year old fuel pump, fuel pump relay, fuel injector relay and the fuel filter, put everything back together and still nothing, cranks but won't start. PLEASE HELP!!!
Dunkine: (2017-10-04 23:17:14)
Any codes from the computer?
FrozenZ: (2017-10-05 00:24:20)
OK, ton of stupid questions:
Have you tried a known good battery? (Since you mentioned autocross, you didn't recently relocate the battery to the spare tire well or something, eh? I did that and went through three batteries in eight months from vibration…)
Did you check the fuel pressure before you replaced the whole fuel system? Have you checked it since?
Have you got a multimeter and/oror a timing light?
If you crank it and then pull a spark plug is there gas on it?
albionwanderer86: (2017-10-05 00:29:25)
Check your MAF and CPS. Both caused my Z not to start, albeit not at the same time.
mwolvinm: (2017-10-05 17:17:15)
Start with the basics… pull a plug, ground it and check for spark while cranking. check for fuel, etc. While you have the plug out, does it show symptoms of something (gas, oil, carbon, completely worn, ect.)
JSM: (2017-10-11 02:11:11)
Grab some starting fluid and spray in throttle body. That will check both spark and lack of fuel if it starts. Also check fuses. I know on the earlier Z's sometimes the key ignition switch will go bad and cause lack of contact to critical components.
turbofedz: (2017-10-11 02:18:46)
I had a similar problem and found out I had a bad CAS,replaced it and my z started first try.good luck.
mprice7725: (2017-10-23 19:38:49)
Success!!!!!!!!
I went to our local bone yard and picked a CAS off of a 1985 for 10 bucks and she's running perfect now.
JSM: (2017-10-23 23:50:37)
That's awesome! Congrats