New mspnp for my 94 gt....have some basic ?'s

Aug 24, 2003
231
0
17
44
East TN
#1
Ok, so setting base timing with factory ecu, you pull the "pill", rotate the dizzy to 14* ( for 93 octane) tighten dizzy, reinstall pill...how do you do this with ms/ts......everything ive read so far (had the pnp for a week now) says to use trigger wizard and set it to 20.....so the base timing is set to 20 [email protected]%!&# degrees?!!!!...

Im confused....the car runs and drives, just not great
 
  • Sponsors (?)

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
6,898
4,065
204
29
Hillsborough county
#2
Have you looked at the instruction manual? Or read the tool tip?

Timing is set using 'fixed timing' instead of 'use table' you get to specify the amount of timing in the fixed timing box.
Then bring up the trigger wizard and use the wizard to adjust the offset until what's in the big box on the wizard matches what the balancer reads. You will not remove the spout 'pill' during this process.

When everything matches close the wizard set the instruction back to 'use table' and save the tune. Now your distributor is synced.
 
Aug 24, 2003
231
0
17
44
East TN
#3
So there is no "base" timing to set?.....the numbers in the timing table, is that actual timing or an adder?.....thanks for the help
 

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
6,898
4,065
204
29
Hillsborough county
#4
Numbers in the table are the timing amount, the ECU needs to know the 'offset' or base timing that is what you are setting in TS with the wizard.
 
Aug 24, 2003
231
0
17
44
East TN
#5
So i followed the instructions for "setting timing"....everything matched up with the MS....which is not what i was wanting to see. Below 2500rpms the car runs ok(still have some fine tuning to do), above say 3000rpms, the car bucks and sputters, backfiring through the exhaust sometimes. I drove around today and kept backing off timing till everthing smoothed out. What i ended up with was a table that looks way retarded (timing wise) but the car runs better. I was hoping i done something wrong and the timing was actually higher than what the table was showing but that it is not the case.The engine is a5.0L " standard" GT40 setup( GT40 heads, intake, with aftermarket cam) running 93 octane. With the factory eec iv it put down 275rwhp, 315 torque. I even thought at one point my MSD box (6AL Digital) may have been the issue, but i unhooked it and the problem got worse.
 

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
6,898
4,065
204
29
Hillsborough county
#6
Uh what was the fuel like? What did the wideband read? Bucking is caused by fuel issues 99.99% of the time, not timing.

much less timing reduces the power output of the engine thus reducing the required amount of fuel, this does not make it right however. do you have a datalog of the drive?? without seeing what the car was doing i cannot give direct advice.
 

Blown88GT

Founding Member
Nov 13, 1999
1,053
111
104
Palm Beach Gardens, FL
#7
Ok, so setting base timing with factory ecu, you pull the "pill", rotate the dizzy to 14* ( for 93 octane) tighten dizzy, reinstall pill...how do you do this with ms/ts......everything ive read so far (had the pnp for a week now) says to use trigger wizard and set it to 20.....so the base timing is set to 20 [email protected]%!&# degrees?!!!!...

Im confused....the car runs and drives, just not great
Either way will work. Removing the distributor SPOUT (pill) locks the timing to whatever you rotate it to using a timing light. After you reinsert the pill, you can use the trigger wizard to verify or modify without the use of a timing light.
 
Aug 24, 2003
231
0
17
44
East TN
#8
Uh what was the fuel like? What did the wideband read? Bucking is caused by fuel issues 99.99% of the time, not timing.

much less timing reduces the power output of the engine thus reducing the required amount of fuel, this does not make it right however. do you have a datalog of the drive?? without seeing what the car was doing i cannot give direct advice.
Bucking was probably the wrong term....sputtering is prob closer.....afr was right around target 13.5

I would gladly get a datalog for you, if i knew how......im very new to all this
 
Aug 24, 2003
231
0
17
44
East TN
#9
Either way will work. Removing the distributor SPOUT (pill) locks the timing to whatever you rotate it to using a timing light. After you reinsert the pill, you can use the trigger wizard to verify or modify without the use of a timing light.
Tried pulling the SPOUT just to see what would happen and the car died.....
 
Aug 24, 2003
231
0
17
44
East TN
#10
I hooked all the factory stuff back up and reset the timing to 10* BTDC. I then reinstalled the MS and using the trigger wizard ONLY and fixed timing, i reset the base timing. What i ended up with was an offset of 52* using the trigger wizard. My timing tables look normal now and the car runs pretty good, although i still have fuel trims to adjust.
 
Aug 24, 2003
231
0
17
44
East TN
#12
Yep.....car is running pretty good......need to get back to the dyno soon and confirm
 
Aug 24, 2003
231
0
17
44
East TN
#13
The only thing i have left to figure out is the A/C Idle up feature
 

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
6,898
4,065
204
29
Hillsborough county
#14
It's fairly simple to setup, however the ECU has to know that the ac is on. I have mine working and it does well. Are you CL idle?
 

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
6,898
4,065
204
29
Hillsborough county
#16
Ok the setting needs to watch the AC input set as either high (12v) or low (ground) it comes I to the ECU as a 12v signal so we can start with high.
I built my own ECU so my wiring internally is different from yours. You may need to see if there is an AC idle up 'jumper' you need to move.
 

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
6,898
4,065
204
29
Hillsborough county
#18
Your jumpers would be internal, I do not have the documentation for your pnp to reference. I would start there
 

Similar threads