CA18DET Tach noise & Reset Help?

cdndub · Post by **cdndub** » Sun Mar 19, 2006 12:40 pm

Sounds just like the SR20DET ECU i've got on the bench for mods.

I'll post up some info shortly.

Make sure you run the ground for at least the 3extra VB921's seperately from the main MS ground, I found that helped with spikes.

THe SR20DET had the exact same issues until i made the right board mods.

Try putting your finger on the top of the board on the input to the CPU IRQ pin, if the tach spikes dissapear I may have some circuit changes for you.

Dave

cdndub · Post by **cdndub** » Mon Mar 20, 2006 2:09 pm

I'll post a mods list tonight, just finishing up the changes and testing, i'll have pics as well

Dave

cdndub · Post by **cdndub** » Tue Mar 21, 2006 8:13 am

http://www.msefi.com/viewtopic.php?p=109104#109104

hope this helps

cdndub · Post by **cdndub** » Tue Mar 28, 2006 9:43 am

Do you have it working now?

cdndub · Post by **cdndub** » Thu Mar 30, 2006 12:22 am

Are your coils grounded to the valve cover or the block? and is your valve cover grounded.. I ran into that issue on the SR20DET, the coils should ground to the valve cover stud that goes into the head, the valve cover when sitting on its nice rubber gasket was insulated and causing ground noise to feed back and cause resets

Post by **jsmcortina** » Thu Mar 30, 2006 5:16 am

Phoenix3D wrote:The plugs I am currently using are Non resistor type... should I possibly try the Resistor type?

Certainly worth a try - someone else on this forum reported a massive improvement when switching.

James

cdndub · Post by **cdndub** » Thu Mar 30, 2006 7:35 am

I used resistor plugs on the SR20 i think isnt that whats standard for these motors?

cdndub · Post by **cdndub** » Thu Mar 30, 2006 1:19 pm

Have you tried moving your grounds for the ECU to the battery, and or 12V?

are all the grounds for the ECU at the same place including the sensors?

pumaking · Post by **pumaking** » Fri Apr 14, 2006 5:27 pm

with my CA18DET I went with the FORD EDIS setup, so far NO problems runs like a beast and no issues have popped up.

glad to see another megasquirted CA keep up the good work. Is your CA in a 200sx?

pumaking · Post by **pumaking** » Sat Apr 15, 2006 5:15 am

yea its amazing how our big problems are caused by such small retarded things.

150kw to the wheels so thats about 201 wheel horse power.

Are you running stock setup like stock T25 turbo, upgraded SR T25 Turbo?

if your using the stock T25 thats very impressive numbers.

Definatly would like to see some pictures