Ok, when you try out the CT FPR, you should expect to see upper 10's/ mid 11's pre vtec to get mid 12's/or 13's up top just fyi. There is about 1.5 afr difference in the fuel ramp up between non vtec and vtec. This is normal. So adjust the pressure to get it right in vtec and either live with the overly rich pre vtec, or get a vafc to lean that area out. This is a proven working method that I still use myself. You get to lower vtec with the vafc also which is an added bonus for more mid power. There is a vafc2 with pnp harness for $235 in the classified's right now which is a great buy. But first things first, lets get this car running proper.

Also for street tuning, 3rd/4th gear is best since there is more load on the car and rpms move slower so you can accurately see the afr, problem is you get yourself in trouble redlining in those gears to tune, so use 2nd to help up top. It takes some time becuase of this, but you can get it in the ballpark pretty quickly, especially if you have a friend to sit bitch and help watch your afr/rpm wile you drive.

Send me a PM if you have any questions or concerns when you get that fpr hooked up and running. When you screw the post down to enrich, make sure you don't go more then 2-3 threads showing from the lock nut, your car will idle surge if you go to far as well so that's a sign to look for.

 

Ok cool thanks a lot.

So what is weird now is that it must be something to do with the MAP sensor or something idk.

Now partial throttle driving is bad like it used to be when I had the MAP clamp box in there. When I pulled that and was running stock MAP sensor just not boosting partial throttle was 99% of the time good except when first starting up the car and driving first 5 minutes.
Now with the Blox MAP block thing(missing link) I can boost(bit lean still) but now partial throttle is back to bogging way down and running lean like it used to be.
On my drive home earlier 2nd gear seemed to stay under 13 afr to close to redline. 3rd stayed under 13 then spiked up to about 14 quickly at around 8k where I pulled off the gas.
When Pre vtec now seems to be great wot. Just partial throttle it really sucks. Starts bucking at low rpm coming from a stop and all.
Somehow the MAP block helps allow the boost of course but at the same time destroys partial throttle driving.

 

Well unfortunately it sounds like you have more then just a fuel delivery issue, though that sounds to be just a calibration issue at this point. Have you tried replacing your MAP sensor? Maybe swap this out with your buddy and see what it does. TPS malfunctioning maybe? The only other thing I can think of is that there may be some problem with the ecu wiring where you had to splice to hook up the VT timing box and ESM. The timing box is out now right? And ecu harness is secured back to 100% normal, no wrong connections or lose wires?

 

Timing box is still in. Map clamp box is pulled.
I have swapped out the MAP sensor already to make sure that wasn't the issue.
Without the MAP block piece the car drives partial throttle near perfect. I put the mechanical piece in and now partial throttle sucks. So can't really be a wiring issue since that piece is completely mechanical. Really weird.
I do have a little idle surge when the car first starts but only when it is fully cold.
I do even without the map block get a slight bogg on first drive of the day and the exact same place when driving each day it boggs down once and then is good to go. Really weird. Now with the map block in it drives like crap partial throttle the whole time it's looking like.

 

I'd remove the timing box, its overkill anyway. You can put it back in later if you want and it proves to not be related. There isn't anything else I can think that it could be.

 

How about the stock fpr? Could that cause any issues? I would think if it was the tps the idle would be really bad and all no? It surges but only when cold and first starting up.

Has anyone else ever had a missing link or map block screw up partial throttle?
That's what's really puzzling me how that would destroy partial throttle like it has.

 

[QUOTE=Moddiction,Mar 27 2010, 08:10 PM] How about the stock fpr? Could that cause any issues? I would think if it was the tps the idle would be really bad and all no? It surges but only when cold and first starting up.

 

Yeah I guess that's true. Well going to try the Comptech adjustable FMU. If things are still bad after that going to try running without the timing box.
Is it safe to do that? Should I not rev it to redline? I know it pulls like 3 degrees timing so will that be unsafe if not running kind of rich up top?
I know comptech doesn't use one but also runs richer than Vortech.

 

3 degrees isn't much at all. Its like an after thought, VT probably realized their FPR sucked and ran to lean up top so this was an added measure of safety lol. As long as your in the upper 12's with the CT FPR you will be totally fine.

What plugs are you running?

 

Ok cool. I am running the NGK iridiums. 1 step colder.
Could they have been fouled out from running so lean before or anything and cause it to run poorly as it does now?