Thread: jdm sr20de swap in b13 se-r.. warm start issue and HORRIBLE gas mileage

you can always down load aem pro or aem tuner since they have ecu pin outs embedded.

i hate this lol.. its starting to go over my poor little honda brain. I have this bad feeling even if i got the diagnostic cable and software I wouldnt know what the hell I was looking at and what it would mean.

location? This forum is good about helping its members. I do it all the time.

im in middle tn.. halfway between chattanooga and nashville on I24. I have a few nissan buddies but to be honest I think this is over their heads as well.

post up in the southeast section I know there are sr20 members in your area.

will do. Thanks for the help!! Greatly appreciate it.

alright guys I just wanted to post an update to let you all know what I have already tried.

1. I have swapped the distributor and coil (also played with the timing adjustment on the distributor)

2. I have swapped the fuel injectors, rail, and fuel pressure regulator

3. I have swapped the two wire temperature sensor on the backside of the engine (passenger side)

4. unplugged the two wire temperature sensor while engine was running and the fans continued to run

5. Checked the spark plugs

6. played with the idle screw on the IACV

7. unplugged the constantly running coolant fans and then adjusted the idle per the instruction manual

8. bled the coolant system multiple times

9. double checked the plugs for the TPS and MAF



And again to recap, sometimes at lower rpm i get a VERY SLIGHT bog or hesitation until i give it a little more throttle while accelerating. I am getting HORRIBLE gas mileage- took me about a half a tank to go 100 miles. When cold starting, it starts right up but does have somewhat of an erratic idle (surges for a few seconds until it finds where it wants to idle. When starting it after it is warm (whether fully warm or partially warm) it will start but then dies again immediately if I don't give it throttle for a few seconds and let off of the throttle slowly. Also as I have said above, I am not throwing any check engine lights. I am completely stumped as to where to go from here.

ANY ideas or help would be greatly appreciated. I just need to get this thing running right so I can drive back and forth to school 70 miles per day.

thanks for all the help guys... Tried a 3rd temperature sensor and now all is well. Just goes to show you can't count on parts to be good unless you know first hand they are. Thanks again!

Glad you got it fixed!