Built B16a with Skunk stage 2 valvetrain. Everything runs fine until VTEC engages at 6000. Engine stutters/misses. VTEC solenoid IS engaging. Oil pressure is 80 before and during VTEC activation. If I disconnect the solenoid, the engine revs fine past the VTEC point.

Could there be something wrong with the cam followers?

Thanks!

 

Anyone have this problem before?

 

I had that problem...Do you have an adjustable Fuel Pressure Regulator?...If you do...You FP could be to low or to high...Try playing with it...Also what kind of ECU or fuel managment you running?

 

Have an AEM FPR set at 38 psi. Running a Hondata stage 4b with stock B16a program.

How did you solve your problem?

 

Here is some more testing info...

Injectors are stock. I have a set of 440s - should I used these instead? I played with the FPR and had to lower it to almost 15 before most of the stuttering stopped! This affects the low cam now and the engine is running rather lean. I also tried up to 60 but no luck.

On my Hondata, I altered the VTEC fuel table for the high lobe by subtracting 40% and it crosses over much better but it's not perfect. Also, when VTEC engages, it it very sluggish.

I'm wondering if I should just go back to the type r cams which ran fine!

Any more troubleshooting tips are greatly appreciated!

Raul

 

Also, I'm using 10.5:1 pistons. Could low compression with these cams be my problem?

 

i tihnk you need to adjust the vtec to higher.. seems like you need to adjust it to 6500.. and adjust your redline ..

 

ROMEO!!!!!

You were right dude...I set VTEC to 6500 and lowered my FPR to 20 and WOW! These cams are the ****.

I'm going to set VTEC to 7k since this is where they start pulling HARD.

Thanks!

 

turn your fuel up and change your plugs

 

ya turn up the fuel pressure back to stock stock is usually 40, but i usually set it a bit higher like 43 at idle.. and 48 at WOT.. and your welcome... nothing like helping a HT member

 

turn your fuel to about 50 set all the hondata at stock settings get new plugs and have someone tune it