I took my car to the drag strip on fri night, and it developed a strange problem that i need some ideas with.

setup is as follows;
91 civic hatch
built ls/vtec @ 12lbs
hx35
tial 44mm
precision 600hp intercooler
walbro 255hp/1000cc inj
S300
obd-1 conversion & new distributer

street tuned on 91oct
it was tuned back in may with the help of a friend, afr's were a solid 11.5:1 under boost, pulled hard and clean through the gears, no issues.

i took the car out to the local fri night legals;

first run shifting into third car hits what feels like lean cut, let off coast for run. second run this time shift to second, hits what feels like lean cut right away again. let off, i can rev up to 2g then cut till 1g then let me rev till 2g again(a painfully slow exit from my lane)

when free-reving the car the rpm point at which i can free-rev to changes. the rev's will also not respond to quick changes. if i rev the car, let it drop then rev again on the way down, nothing will happen right away... the response is very delayed.

when driving the car i have till 1800-2000rpm before it cuts me. makes for a long ride home when your powerband is 1000-2000rpm, lol

any ideas? i am leaning towards something ignition, possibly faulty coil, maybe tps? i had msd wires, switched to ngk no difference. the s300 seems fine has green lights?
tried disabling launch control, lean cut/boost cut, etc.. and no change in how it responds.

car idles fine, doesnt die when it cuts me either and no cels???

 

Hookup a laptop & start logging :-)
Make sure you are getting a steady tps signal etc..

 

i wish i would have been logging when it originally happened. i'll check out the tps signal.

any ideas what to look for in logging with a faulty distributer?

 

I had the sam eprob once- not sure about RPM range, but car would rev ok at idle, but inder WOT at load, it would not run right (stutter/ felt like fuel cut). I had a bad spark plug did you check plugs?

I also had a bad dizz once, did not throw codes, but it ran ok, just would not idle very well.

 

well i think i found it i hope.

the way the edelbrock mani postitions the tps is really close to the fuel fitting on the firewall of the EF, maybe 1/4" away. under hard accel it was hitting i guess. a few wiggles and the leg of the tps broke right off!

i'm hoping this was the entire issue, i guess we will see.