Car doesn't start when cold

KRYPTION

MEMBER
HONDA ACCORD

I have a 1993 Honda Accord with 390,000 miles and a 3.0L stick shift engine. It starts only when it is warm. It will not start at night or early in the morning. It also won't start if it's a cloudy day. It will just turn over, but not start. When its hot and sunny outside, the car starts with no trouble. We have replaced the cap and rotor, battery, spark plugs, and regulator. Any other suggestions?

4 Replies

BRUCE HUNT

MECHANIC
3,754 POSTS

EFI relay located under the dash on the driver side. Might look at the connections for bad solder joints else just replace it. Buy one and you will know what you are looking for.

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Thursday, July 26th, 2007 AT 8:38 AM

KRYPTION

MEMBER
2 POSTS

Ok, we replaced the EFI relay and the same problem still exists. Any other suggestions?

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Thursday, July 26th, 2007 AT 1:11 PM

KIN CHAN

MEMBER
453 POSTS

EFI main relay is the other way around. No start when engine warm up. Okay I just went thru my honda class material from larry defjklashjksahgksja. What honda & Toyota in common is they buy a good base and keep putting new parts but same strategy on the same platform. The ECT sensor on Honda strategy is what input signal use for calculation on injectors pulse width, timing & idle speed on cold start. Once it get into close loop the TPS take over. And the ECT sensor only repsonsible for idle spd. Ur signal to computer should be close to 5 volt ref when it is cold. Again.I am giving info.I don't advocate in parts changing by luck

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Thursday, July 26th, 2007 AT 1:25 PM

BRUCE HUNT