Hey guys i need some help, ive had this solid cel ever since i got my p28 chipped. i got a y7/z6 in a 98 coupe with boomslang obd1 conversion harness and stock uberdata p28 map. The car idles kinda rough, vtec dont engage, and its slow as ****! anyways the ecu has to be fine cuz it works perfect in my buddies accord with his chip in it and i used his p28 with my chip in it and i get the same thing. Could it jus be a bad chip? Im frickin lost so any input would help. plz no hating.

Phil

 

I have the similiar problem to! My redline at 4100rpm!

 

cmon guys nobody has anything to say?

 

bump! im having the same problem with my car

 

damn everyones ***** fucked up!

 

Have the same symptom when I tried out my modded p06 to p28 ecu. Later on found out that closed loop was enabled so disabled it and my problem has gone away. My assumption is that your chip has closed loop enabled. By the way, use crome, its a great program.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dude_123 &raquo;</TD></TR><TR><TD CLASS="quote">Have the same symptom when I tried out my modded p06 to p28 ecu. Later on found out that closed loop was enabled so disabled it and my problem has gone away. My assumption is that your chip has closed loop enabled. By the way, use crome, its a great program.</TD></TR></TABLE>

what does closed loop mean? by the way, im running a stock P28

 

im confused isnt the car in closed loop everytime i sart it? then it goes to open loop like when it warms up right? but yeah im gonna try a crome map is there a way to disable the closed loop when i burn the chip? (with crome or uberdata)

 

with crome you have to select "disable o2 sensor (open loop)" for it to be in open loop so if you don't select that, it will be in closed loop.

 

oh ok thanks. and it will still run well with the o2 disabled?

 

bad chip. Burn another one. Also, the uberdata base maps run like ****.

See if you can find a known good stock z6 bin file on the web somewhere and try that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxhf89 &raquo;</TD></TR><TR><TD CLASS="quote">Hey guys i need some help, ive had this solid cel ever since i got my p28 chipped. i got a y7/z6 in a 98 coupe with boomslang obd1 conversion harness <U>and stock uberdata p28 map</U>. The car idles kinda rough, vtec dont engage, and its slow as ****! anyways the ecu has to be fine cuz it works perfect in my buddies accord with his chip in it and i used his p28 with my chip in it and i get the same thing. Could it jus be a bad chip? Im frickin lost so any input would help. plz no hating.

Phil</TD></TR></TABLE>

Problem located. First of all, the cel is due to either a) improper checking uder the "misc" tab in uberdata or b) bad chip or loose chip connection. Nothing else will give you a solid cel, period. I'm 99% sure it's because you didn't get the "misc" tab settings right.

Also, the car will run pig rich on an uberdata basemap. You shouldn't run the car like that. Stock uberdata maps are **** - almost worthless.

 

im getting the same problem, but im running a stock P28 on my car.... any suggestions?

 

well i didnt burn the chip so i dont know if it was done correctly but im gonna try to get it reburned. would it run better with a crome map compared to uberdata? im prolly gonna jus use crome anywayz

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxhf89 &raquo;</TD></TR><TR><TD CLASS="quote">well i didnt burn the chip so i dont know if it was done correctly but im gonna try to get it reburned. would it run better with a crome map compared to uberdata? im prolly gonna jus use crome anywayz</TD></TR></TABLE>

Crome is better if you buy the $150. The free version doesn't have the same features that free Uberdtata does. But Uberdata is buggy software. Both have pros and cons, take your pic.

 

uberdata's fine if you know what your doing you need to remove the checksum on the rom in hex edit as far as the solid cells double check soldering job because if you got good roms and try them out ecu's know good just cut j1 and run it stock p28 good luck.

 

im pretty sure the ecu is fine it works perfect in my friends car wit his chip. I also used his p28 with my chip in my car and i still get the solid cel

 

then your rom is no good if your use'n a zif sockett make sure all your connection in the pins are in the socket ive had that problem get some one to burn a good rom with checksum removed thats your prob.

 

Had this same problem because my car vibrates a lot. Alot of chipped p28 ecu's have the chip held down by a little metal clamp, lift it up and make sure the chip is actually snug in the socket. Took me about 3 weeks to find this fix for mine,hopefully it helps someone.

 

its possibly a bad rom if you didn't insert the chip in the burner properly or the addressing is off also crome has the option of clearing the checksum for the file if its modified the solid cel will go on if the rom fails to load or the checksum dose not add up properly

 

if your roms different and the ecu cant detect the right things it will throw the light

 

My chipped p28 cel light stays on as well. Im going to bet maybe the seller of the ecu from ebay didnt do a good job than. My prelude gets fuel and turns over no problem but will not get spark even with a brand new dizzy and coil and yes i constantly check the ecu fuse and relay is fine. Your post brought me to attention on looking into my ecu better thanks .