I have a 90 Acura Integra. Most of the time when I go to start the
enigines fires off for less than a second then quits. The second start
try usually works and I have no issues until I try to restart the car
again. I have changed the main fuel pump relay, installed a new
starter, and a new fuel pump has been installed in the last six
months. Any ideas?
solder can crystallize over time.If a relay has been sitting in stock for a
long time,it's solder joints could be crystallized,ready to crack under
stress or thermal cycling.(tin migrates,grows whiskers,too.)
If you can turn the switch ever so slowly and find a "sweet spot" where
problems occcur, then the switch may be bad.
See here for more details:
put a voltmeter on the wire from the "operate" position that supplies
12 Volts to the engine circuits,and monitor it while you crank,start and
when the motor dies.If you lose 12V after cranking and releasing the key to
the run position,then the switch is bad.
I have not looked at that. Great idea. The Main Relay was new.
Before I changed the main relay the car would not fire at all. It is
firing now, but then cuts off. I have a RPM spike now, when before
the relay I had nothing.
I think the ignition switch is a great recommendation.
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