93 Integra Starting Issues

1993 ACURA INTEGRA
207,000 MILES • FWD • MANUAL
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DSTEPHENSUSA
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1993 Acura Integra has starting issues.
Had mechanic check dist sensors and all reported corect OHMS. Had him check error code and said it showed a 5 which is the MAP sensor. Replaced MAP sensor and still have starting issue.

Car typically starts fine but on occasion will not start at all. After driving the highway for 10 miles, car will not start. Wait around two hours and it starts fine.
If the dist sensors are ok, the MAP sensor is new, spark shows up am I left with it probably be the distributor needing to be replaced?

Jan 16, 2011 at 1:10 AM
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KHLOW2008
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https://www.2carpros.com/articles/car-cranks-but-wont-start

The above link explains what to look for.

If it is a fuelproblem, the moost likely cause would be a bad PGM-FI main relay. This component is known to intermittently fail and weather affects it operation. Remove the relay and check the circuit board, if there are signs of soldered joint having cracks, resolder them and it should be good.

Jan 16, 2011 at 12:08 PM
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DSTEPHENSUSA
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Looked and looked for the PGM-FI relay and can't seem to find it. It's not where my repair manual says it should be so, I'm lost as to its location. Can you point me to an accurate location?
Jan 16, 2011 at 7:35 PM
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KHLOW2008
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Under left side of dash, left of steering column.
Image (Click to enlarge)
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Jan 16, 2011 at 10:06 PM
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DSTEPHENSUSA
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Thanks! I purchased a new one from NAPA and immediately had starting problems and a check engine light come on. Just returned it to NAPA and got another one and the car initially started up fine but, ten minutes later, wouldn't start at all, Installed old one and engine starts. Could NAPA have TWO defective main relays in a row?
Jan 21, 2011 at 8:54 PM
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KHLOW2008
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That is possible. Remove your old relay and resolder all the joints, it should solve the problem if it is bad.

If it is not the fault of the relay, you are looking at the possibility of a bad ECM.
Jan 21, 2011 at 11:28 PM
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DSTEPHENSUSA
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I ended up reading the code for the check engine light that had appeared previously and and it was 6. I saw where that indicates the electronic temperature sending unit as the problem.

Purchased a new one and when I was under the hood I couldn't figure out how to release the wiring harness from the old one. Is there a site showing harness connections and how to release them?
Jan 22, 2011 at 5:41 PM
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KHLOW2008
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The ECT connector is plugged in and you have to press a tab to release the lock before you can pull the connector off.

I don't have any diagrams to show you but if you look at the IAC or IAT connectors, you would be able to understand how it works.
Jan 22, 2011 at 6:52 PM
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DSTEPHENSUSA
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Ended up just breaking the #@@$% thing off since nothing or no one could get it off. Replaced sensor and looks like the starting issue has been solved after replacing the MAP sensor, Main Relay and ECT Sensor. Problems continued to exist until the ECT sensor was replaced so, for future reference, it looks like that was the main culprit. I ended up replacing valve cover gasket, plugs and oil tube seals as well, because of oil leakage onto the the spark plug wires.

Thanks for your help!
ds

Thanks for your assistance.
Jan 23, 2011 at 7:49 PM
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KHLOW2008
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You're welcome.

Glad to know you have fixed the problem.

Have a nice day.
Jan 24, 2011 at 12:05 AM
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