Microtech Microtech tuning Q's Lt8
10-19-09, 08:17 PM
#1
Microtech tuning Q's Lt8
Ok guys i have a lt8 in a 90 turbo 2 the car backfires continually and struggles to start but always starts when engine is warmed up i think its something with my tune or timing?After the car turns on it doesnt backfire anymore?The car is streetported,super seal apex seal, pinned down,external lubrication ,460cc in primary and 1600cc in secondary the walbro255,FPR is set at 42psi @idle, t70 turbo with front mount intercooler.The car runs ok and spools very fast just have this backfiring issue that kinda started out of No where?
My second question is there anyway on the microtech dash kit that the temperature instead of reading celsius can be changed to farenheit.
Now my third question is what steps do you take to set the position on the crank sensor, like where do you want to set it at when your first installed a microtech.
im kinda a rookie at this so sorry for the noob Q's
My second question is there anyway on the microtech dash kit that the temperature instead of reading celsius can be changed to farenheit.
Now my third question is what steps do you take to set the position on the crank sensor, like where do you want to set it at when your first installed a microtech.
im kinda a rookie at this so sorry for the noob Q's
10-22-09, 09:07 AM
#4
Engine, Not Motor
iTrader: (1)
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 108 Likes
on
91 Posts
It's probably backfiring during starting because it is too lean. Try increasing the crank settings for the low temperature area and give it a bit more fuel in the water map.
Then again, if your CAS isn't set, the timing could be way off and causing the same issue.
To set the CAS, start the car and warm it up so that it is idling around 1000 RPM. Set timing lock to "on" in the Microtech and then using a timing light on the leading coil, adjust the CAS until the pointer lines up with the yellow mark on the pulley. Then snug down the CAS and turn off the timing lock.
Then again, if your CAS isn't set, the timing could be way off and causing the same issue.
To set the CAS, start the car and warm it up so that it is idling around 1000 RPM. Set timing lock to "on" in the Microtech and then using a timing light on the leading coil, adjust the CAS until the pointer lines up with the yellow mark on the pulley. Then snug down the CAS and turn off the timing lock.
Trending Topics
10-22-09, 11:59 AM
#8
there should be 4 marks on the pulley. Looking at it from the front of the car. the one sll the way to the left is 10atdc, the one all the way to the right is 20btdc. Timing should be 5atdc. That would be between 10atdc and 0
l l l l
10atdc 0 10btdc 20btdc
^
5atdc
l l l l
10atdc 0 10btdc 20btdc
^
5atdc
10-24-09, 10:09 AM
#10
Engine, Not Motor
iTrader: (1)
Join Date: Feb 2001
Location: London, Ontario, Canada
Posts: 29,789
Likes: 0
Received 108 Likes
on
91 Posts
You can use either of the leading wires.
I just use a cheap non-adjustable made in China timing light. If you have an adjustable timing light, just set it to zero.
I just use a cheap non-adjustable made in China timing light. If you have an adjustable timing light, just set it to zero.
10-25-09, 11:13 PM
#12
I aked this basically the same question when i was goign threw this. everyone sid it don't matter you can mix them and whatnot. so i did. havn't had any problems so.
Thread
Thread Starter
Forum
Replies
Last Post
demetlaw
3rd Generation Specific (1993-2002)
6
10-02-15 06:22 PM
