05 Honda Civic 1.7
Hi got this 05 civic crank no start when it’s cold 32 or below has plenty of fuel pressure and spark as soon as it warms above 35 it firers right up ect and at readings look good thank in advance
Monitor battery voltage during cranking and see how low it drops. I have had a nissian titan due this due to low battery voltage, the crank sensor voltage would drop just low enough not to fire the injectors, and have no spark. something to check
Have you checked the valve lash? Battery tested? Oil condition and proper grade/weight? Give us some diag to date and help is easier to give.
Hi Jeff, Does this have an air cleaner ambient temp sensor? If so, check it for being disconnected or damage. I've seen quick lube places break quite a few of these.
I would look at coolant temp sensor and ambient air temp sensors to verify they are reading correctly. Intake air temp sensor also. Sometimes part of the MAS airflow sensor. If if has one, check it for contamination of oil/debris. They make cleaners for them. A lot of people just use brake cleaner. The ambient air temp sensor is in the grill usually. Sometimes they are used to verify other…
It has plenty of fuel pressure but does it have sufficient fuel to start? Spray some carb cleaner into intake to see if more fuel volume solves the problem.
I agree PGM relay or any Jap relay related is suspect when temps below Zerex
Jeff, do you have means to check the fuel quality? You may have fuel density or alcohol issues. When it is running what are the fuel trims looking like?
Jeff I had a GM that gave me similar problem, it was the crankshaft sensor, look if it is producing any rpm when it’s cold
Dear Eric: I would suggest that the valve adjustment is too tight allowing them to leak at freezing temperatures and shorten the compression pressure. When running, the valves “hammer” themselves into the seats reducing the clearance. The clearance is .008 intake and .011 exhaust and it's essential that the measurement be taken between the rocker an the top of the valve rather than between the…
Right on! Diag needs to begin with BASIC'S before looking for silver bullets.