RSpeed

My car is throwing a code 43 and is running real bad after about 10 minutes.According to my manual,43 is related to ESC,TPS,and knock sensor.Which is more likely the problem with the following symptoms,so I can have a better start looking into the problem:
1) Hesitation at wot
2) Temp usually stays around 180-190*. Since this new trouble code,been running around 220*
3) Backfires more often
4) rpm surges +/- 500 rpms, at any throttle position
All this just started happening and I'm only showing a code 43.
What do you guys think/suggest? I'd appreciate any help.Thanx.

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'91 RS 5.0 TBI
New paint-solid black
ROH Snyper wheels-17x9 wrapped in 275/40/17
ASCD SS hood, High-rise Z-28 spoiler,shaved handles/antenna,
Hooker super comp headers,dual 3" exhaust(yeah,too much for my set-up,but it was free!),two 1-chamber Flomasters,Eibach Sportline springs,KYB struts/shocks,rebuilt steering linkage,Iroc sway bars,IROC steering box,wonderbar,140 Iroc gauge cluster,Auto meter gauges,dual guage A-piller pods,open air filter,AFPR,smog delete
TBI mods,180* thermostat,
383 stroker in the works

President-Austin 3rd Gen F-body c.c.
Austin 3rd Gen F-body c.c. message board at
www.hpsmotorsports.net
See my car and others at www.ride4life.net

8Mike9

I've worked on two vehicles with a code 43, both turned out to be the knock sensor...there's a detailed test procedure for it to see if that's the problem (other than hammering on the block to check function).

Find someone with a Helms for the procedure.