I have read many threads from others with my same problem, but no one ever answers. Hopefully this won't be one of those threads.

I have a 94 Honda Civic CX with a b20 vtec turbo,stock map,460cc injectors and s300.

I've been working on this car for almost 2 years, it FINALLY started for me today. My problem is....

The engine idles really good and even drives good, AS LONG as I don't press the throttle to the floor. With the car in Neutral, I can press the throttle to the floor and my car sounds like it has a 2k-3k rev limiter or maybe a launch control enabled, but I know neither of those are. While driving the car, it runs fine, until I try to give it any real throttle. When it happens, the CEL flashes, but no error code...I have a AEM wideband and I'm in the process of trying to apply a street tune, when I'm accelerating my wideband says I'm running extremely rich, but once I let off the gas alittle and just keep a steady speed, the AF runs between 13.8 - 14-5. What is the deal? Does the S300 have some sort of safety feature that will cause a fuel cut if the engine is getting to much fuel during a load?

I've added a screen shot of my Graph showing what's going on when this happens.

Any help would be appreciated

 

my turbo lsv ran like **** when i first put the turbo kit on, I couldn't beat sohc's, then I took it to a dyno shop to have it tuned, car came back to me and I smoke 700cc bikes and hang with 1000cc R1's, I think u just need to have it tuned.

 

It's very possible, but I just want to make sure. Because I've spent way to much money on this thing already! I wanna make sure all of my ducks are in a row before I pay for dyno time. Does the ecu or s300 have some sort of feature that will cut the injectors off if its getting way to much fuel during acceleration? Because my wideband is off the chart during acceleration (Rich) I'm still learning how to tune with this S300. I have it tuned good at idle and low speed, but if I try to give it any good amount of throttle it cut's out and pop's on a CEL until I let off the throttle. Then the CEL goes out and it back to just cruising again...

 

not sure my **** was tuned on ectune

 

s300 has a lean cut on it
and for it to work properly u have to have ur wideband wire to ecu and calibrated

-it feels like hitting a wall and car falls on it face(lol lean cut )

 

Sounds good to me, but the wideband is reading rich when it does it, during hard acceleration.

What do you mean by calibrating the wideband to the ecu? Because I have the car where when it idles the wideband is reading pretty good and even reads good during soft acceleration.

-My wideband ISN'T connected to the ecu. This could be my problem!

 

Ok, I figured out what you meant. Man there is ALOT of settings for this lambada thing. I'm trying to figure it out though.

 

wheres boost cut set at

 

 

in the above graph are you letting off the throttle where it shows you are

 

How much boost u running? What's the timing at? How much are you retarding it ?

 

Yes. When the cel comes on and the engine cuts out, if I hold down the throttle the CEL wont go away, which mean's the engine power wont come back on. So I have to let off the throttle completely the the light will go off and I can continue driving.

 

No boost controller, I'm running straight from the exhaust with a 7-8psi spring in the wastegate and BOV.

Timing, TDC

No retard that I know of...

 

This is what I have it set to....

 

Problem solved! It's running great on a base map from T1 (Dallas,Tx) Now all I need to do is try and put back alittle cash so I can go get a tune!

What was the problem?
The map sensor was calibrated wrong.

 

I have just a b20 vtec crx and it does the same thing it is also running rich and it doesn't have the s300 it just has a built ecu I really can't figure what the problem is any ideas?