Ok I have a car show coming up in a few weeks. My car has had a crappy idle slowly getting worse for a month or two. Now sometime the car will not start especially after running for a few minutes. It died on me on the way home one night had to have it towed next morning started up fine! I have talk to a Honda Tech who is currently working on his own and after alot of discussing diagnostics and checking this is what we have and have not tried.

Things That Have Been Checked and Passed
• IACV
• TPS
• MAP Sensor
• IAT Sensor
• Whole Distributor
• Spark Plugs
• Spark Plug Wires
• Checked for Vacuum leaks
• Bled Coolant System
• Timing is stock and dead on
• All fuses are good
• Alternator is brand new and charges.(12 Volts while Off And almost 14 when just driving around)
• ECT Sensor
• ECU
• Main Relay

Things that are Next to Try
• Thermostat
• O2 Sensors
• Fuel Pump

My question is Can bad O2 sensors cause hard starting? I know a fuel pump can and my fuel pump does not seem to be as loud when u turn the key to position 2 when all the lights come on, or atleast its not as loud as my friends. But the thing is I am getting fuel pressure or it primes it and it sits at 40 psi once primed... Another thing I noticed is that after its starts doing this wierd idle the fuel pressure on the gauge seems to go down instead of up when u push on the accelerator. I forgot to list too that the fpr seems to be fine too.

I am very desperate and ahve tried everything mention in every post about idle and such. I would do anything to have this fixed and running asap please help!

 

i just had a problem similar to this , it ended up being my o2 sensor . my car would start really hard then once it warmed up it would just die on me after a while . But i was running really rich and basically it was flooding itself . Were your spark plugs black ?? It was showing it was running rich but no smoke out of the exhaust just really black spark plugs .

 

What's your setup?

 

Fixed the startup problem the rebuilt alternator I bought crapped out on me... I put back in the old one that i pulled from another d16 works fine... Just have to swtich out the pulleys again... now for the idle still not workin right is it possible the new IACV I just bought is shot from the factory?