Troubleshooting B18C1 Turbo has idling problems with current setup *SOLVED*
 

Can’t get my b18c1 turbo build to run.

It has sat 2 whole years in my garage while I was away for work.

I had it idling perfect last week, turned it on and off multiple times that day.

As soon as I tried to back it down the driveway in reverse, it died and won’t idle anymore.

It will idle with throttle given, but pops and bangs and puffs smoke.




Quick breakdown:

Wiseco/Eagle bottom end

Edelbrock victorX intake manifold

Rc1000’s

Walbro 255

Hondata s300

Hondata 4bar Map

Unsure what turbo it is.




I’ve done 2 compression checks. All cylinders in the 190’s.

Done 2 leak down tests. No issues

I am getting fuel at the fuel rail, no problems there.

Fuel has been drained and replaced with 91 octane.

Spark plugs replaced (yes I am getting spark I have checked that)




What could it be? Injectors? Bad MAP sensor?

When the car is trying to idle (with throttle applied and very poorly, when I remove the MAP from the Intake manifold it continues to run the same no changes).

Maybe it’s the MAP?

Its strange that it idled so well multiple times in a day then the time I go to drive it, dies.




Next step is downloading Hondata to a laptop and plugging it in, that may give me more clues.

No engine codes/lights on the dash.



Thanks guys. It’s been years since I’ve been on here since I did a d16 vitara turbo build and an h22 ej1 build.

re: Troubleshooting B18C1 Turbo has idling problems with current setup *SOLVED*
 

It sounds like by the end of the driveway it was warming up , and thus fell out of tune.

Are you tuning it? With what settings? upload a Datalog or base map .

How were you planning on tuning it ? No laptop , or dataloging.

There is a procedure for checking the MAP sensor, do it if suspect.

re: Troubleshooting B18C1 Turbo has idling problems with current setup *SOLVED*
 

I'm suspecting fuel or tune related. No cel=no sensor problem. Check map settings and TPS calibration in Hondata, hell, try loading a base map to see if it works out. Sitting for that long takes its toll.

re: Troubleshooting B18C1 Turbo has idling problems with current setup *SOLVED*
 

I was also thinking fuel. I know you verified fuel at the rail, but what about fuel pressure? Verify all 4 injectors are firing.

re: Troubleshooting B18C1 Turbo has idling problems with current setup *SOLVED*
 

Yes.. Verify pressure, not just whether or not the pump primes. The pump can still prime and provide fuel to the rail and all that good stuff but still cause a no start issue because it's not working right; ask me how I know this. Lol!

re: Troubleshooting B18C1 Turbo has idling problems with current setup *SOLVED*
 

I replaced the 4bar MAP with a brand new one that we borrowed and it runs great. Thanks for the input guys.

re: Troubleshooting B18C1 Turbo has idling problems with current setup *SOLVED*
 

Thanks for replying with the solution