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Need Help!!
My 2001 occasionally fails to start when it is cold until after several attempts. I have changed the PGM-FI#1 Relay but that didn't fix it. When it fails to start I can hear the fuel pump prime up for a couple of seconds. I also do not see a flashing key symbol indicating an anti-theft problem. Should I change PGM-FI#2? Is there another Main relay that could be causing this?

 
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My 2001 civic idles rough and sometime will almost stall. Off idle it seams to be running fine. All I have looked at is the spark plugs and air filter and both are good. Someone I spoke to said this is normal on these cars but I don't buy that. Anyone with ideas on this?

 
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(Merged your threads together.)


No it's not normal.

CEL on? Got codes?

Sticking IAC valve? Idle relearn?

 
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No codes,will clean IAC and do the relearn procedure.
What about the hard starting issue regarding the PGM-FI relays?
Thanks

 
Rep Power: 519

Hard start, rough idle, and stalling are likely all related to the same cause.
A poor running engine is often hard to start for the very same reason it runs poorly.


The 2 main relays: One runs the fuel pump, the other supplies power to many of the engine controls and the PCM.
If the fuel pump runs when it should, I doubt its relay is at fault.
If the check engine light comes on when you turn on the key then I doubt the other main relay is at fault.


These would be easy enough to check with a voltmeter, just tap into any of the many circuits that are powered by the relays and watch for voltage.