I just finished getting my lsvtec motor in the car and the car won't hold idle. Before I was able to rev it a bit to move the car, but after installing the s300 it won't even let me give it gas without dying. Here is what I've done so far:

Double checked to make sure tps and map wasn't switch
Calibrated tps in s300 (it says with no throttle it's at 5% and at max 60% so something must be off there)
I messed with timing, and it's at tdc or as close as I can get it. I am having to run a crv b20 crank pulley because my integra ls pulley was falling apart from rust.
I have messed with ignition timing a bit, but it's hard to set it without the car idling at all.
In Hondata the base map I chose was b18c5 turbo, but I changed the injector size to 240cc because I'm still running stock injectors


I might of left something off, but that is what I can think of at the moment. Any help is appreciated!

Edit: Forgot to mention, that the CEL won't turn off after the fuel pump is primed

 

yours isn’t boosted, and that could be one of the reasons It won’t start and that map probably doesn’t have the stock map sensor on file and Running a 3bar or something, it also could be totally wrong fuel/timing and not the correct compression as your motor. Basically I’m sayin a turbo b18c5 map is not goin to be close to your n/a ls vtec setup.

so first pull the cel code and download the correct n/a basemap close to your compression and setup.

once you do that. Go into Hondata and make sure your map sensor and injectors are the same as your setup and put it in open loop.

 

Oh, I probably should of mentioned it is boosted, but I won't be running any boost at the moment because I still have to break in the motor, but I didn't take fuel into consideration since their is still 87 from when the car was just a stock b18b1. Could I just run a stock b20 map atm while I break in the motor. I would imagine injectors would be the same as my stock b18 injectors until I install my 1000cc injectors.

Also, I went to check on the CEL, I bridged the connector on the passenger side with a paper clip and it didn't flash. Does the car have to be running to see the check engine light?

This is my first rebuild, so I'm new to all of this. Thanks again for the help!

 

since you have a vtec head on a lsblock a stock b20 won’t breathe the same as a vtec head so it probably won’t start it, if it does then it’ll run like crap and won’t be the basemap you need to break in your motor since you have vtec now.

what pistons and head cylinder are you using?

There should be some ls vtec basemap in the Hondata open files or you can also check in the Hondata vault section for someone else that has close to your setup.

and the car doesn’t have to be on to read the cel code but it does have to be on ignition ll where the pump primes and shuts off.

 

Well, I don't plan on going past 4000 rpm since I have the break in the motor. I have manly lsvtec 9:1 compression piston, with a b16a2 cylinder head, with supertech springs and retainers and skunk2 pro series turbo cams.

Ok, tomorrow I might try bridging the connection with wire since I didn't have any luck with the paper clip.

 

I broke mine ls vtec in a gsr block hard reving to 8400rm. But first I Varied the rpms and letting it self brake in gear so it forces the rings out to seal. You need to google how to break in a motor and you’ll get the idea. Drive it like how your goin to drive or otherwise it won’t seal the rings correctly. But that’s on you

 

Oh ok, I didn't know that. I guess if I can get it to idle, I will probably just get it tuned then.

 

Ok, so I'm just going to update a bit to see if anyone can help me with my idling issue. I was finally able to get the car started today. I put a stock integra ls tune on it and unplugged the iacv and I was able to keep it running by giving it throttle, but it ran rough, and hesitated when giving it throttle. Plugging in the iacv the car started better, but would die just like it did previously. I also took the spark plugs out, and they were black, but it could be wiped off. CEL is still on, but bridging the connection on the passenger side connector does nothing, the CEL stays solid. The iacv I did notice today was humming when plugged in, while the ignition was on, a lot of users was saying it was normal, but I just thought I would mention it just in case. Lastly, since I'm doing this alone I can't check the fpr while the car is started, but was able to turn the key and check it that way and with the fuel pump priming my fuel pressure is around 60 psi. Any help is appreciated!

 

If you can provide the tune file and a data-log I may be able to help. Does the car have a wideband?

 

I may have to come back to you, I just found out my hondata wasn't soldered properly, and I was told that is going to fix most of my problems, but I know even with a stock ecu it still wouldn't idle, but I could give it gas to move it, probably had to do with the bigger cams I installed. Also, no wideband yet, my exhaust wouldn't fit, so I have to get it modified.

 

Sounds good. Let me know when you have it fixed and the wideband installed.

 

I'm sorry I forgot to update the issue, I just kinda forgot about it once I was able to figure out what was going on. Turns out my ecu died after the s300 was installed. My friend accidentally killed the board when he went to install it. I got a new ecu with the s300 board already installed and it starts right up.