93 5.0 MSPNP2 tuning ?s

Skind

Member
Jun 28, 2018
65
4
8
119
IN
Hi folks! Been reading for a while on here. Decided to post to see if I could get some help and guidance. Recently bought a 93 hatch 5.0 5sp with a MSPNP2. Other mods would be Edelbrock performer heads, Explorer intake, FoMoCo 47 lb injectors, 70mm Accufab TB, full 2.5" exhaust, and an old school Paxton sn2000 on it. All mods were done before I bought it. Would like to do more to it, but would like to get the tune sorted out before I start adding more to it. Supposedly it was tuned by a shop in Nov of 16. It does run well at wot. But has issues with normal drivablity. At a cold start and ambient temp below say 70*, it will start up fine and idle down fine. A cold start at ambient temp around 90*, it will start drop real low almost dying and run like crap until I baby it enough to get on the road, once I get going it seems to be fine. Hot start does basically the same thing. I've also noticed it seems to have some dead spots while going through the gears less than half throttle or so. Not wot. It happens around 1,800 and again around 3,500. While this happens, I notice the AFR is way lean, like 15-16. It also has a small idle surge 100 rpm or so. Vacuum is around 17-18 stock cam. And a few other issues I can't think of right now. I'm assuming it just needs the fuel dialed in more. But I'd like someone to look over my current tune to see if there's anything else out of wack, before I start messing with it. I really appreciate any and all help! Thanks!
 
  • Sponsors(?)


Skind

Member
Jun 28, 2018
65
4
8
119
IN
Ok. Thanks. Here's what I got off the ecu. I saved it as original tune. Hopefully it will attach. I would like to add that when I bought the car the "electronics" ground wire for the wideband (its a Spartan2) was unhooked. I hooked it back up, and it appers to be working now, but I read that a wideband in an active exhaust stream that is not powered will ruin it. So, it's possible that it isn't accurate anymore. Would it be worth temporarily changing the tune to "don't include afr target" to see if it will run better? I do plan on buying a new wideband.
 

Attachments

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
9,602
5,796
204
31
Hillsborough county
Don't change any settings arbitrarily unless you know what they do. If you turn 'include afr target' off the system will no longer treat the afr table as a real table, it will be a reference table only.
Sounds like the car was "tuned" a lot of guys get a partial tune from a dyno shop as the car does not see all load scenarios like it does on the street, getting a shop to do cold and hot start tuning cost's quite a bit and requires they have the car for extended periods of time.
 

5.0Thunder

Active Member
Jan 31, 2018
128
34
38
29
Ditto on all that. If you can create datalogs of your engine starting scenarios, we could help figure out what the car needs. cold engine start, warm engine start, in both cold ambient temps and hot ambient temps would be beneficial.
 

Skind

Member
Jun 28, 2018
65
4
8
119
IN
I will work on the datalogs. Might be a little slow getting them. Been working on the house. Ha! Have to keep the wife happy.
Did you or anyone else get a chance to look at the tune. Did anything look out of wack? Anything you'd change? Or is it good enough to just start dataloging and make changes from there? Thanks!
 
Last edited:

Skind

Member
Jun 28, 2018
65
4
8
119
IN
I got a little time to do a few logs. This one is from a cold start through till the thermostat opened up. It started normal on this log, ambient temp was around 75-80*.
 

Attachments

Skind

Member
Jun 28, 2018
65
4
8
119
IN
This one is driving "normal", not wot. I held the gears to show the "dead" spots or "falling on it's face" around 3,500 and 1,800. I think I focused on 3500 first then 1800 towards the last.
 

Attachments

Skind

Member
Jun 28, 2018
65
4
8
119
IN
I can see from the tune, your MSPNP2 needs a firmware update. Latest is 3.4.2; you have 3.3.1
http://www.msextra.com/downloads/

Looks like you're using Tuner Studio Lite. You need the paid version to enable VEAL (VE Analyzer Live), i.e. Auto Tune.
Blown88GT I do plan on getting the paid version if it's worth it. Is it?
I thought I read in the manual that if I update firmware, it would mess the tune up. Will it? Will it cause problems tuning if I don't upgrade?
 

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
9,602
5,796
204
31
Hillsborough county
The paid version is very worth it way better than the lite version. I use TS ultra, but it's not needed for the average guy.

Back the tune up and update, it won't mess up the tune but things will look much different after the update. A lot more options.

The updated firmware will work better, the upgraded tuning software will add features that I can't imagine tuning without.
 

Skind

Member
Jun 28, 2018
65
4
8
119
IN
The paid version is very worth it way better than the lite version. I use TS ultra, but it's not needed for the average guy.

Back the tune up and update, it won't mess up the tune but things will look much different after the update. A lot more options.

The updated firmware will work better, the upgraded tuning software will add features that I can't imagine tuning without.
a91what, are the datalogs I posted still usable with the outdated firmware? Or do I need to update the firmware and log again?
 

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
9,602
5,796
204
31
Hillsborough county
They will still work fine, megalog viewer just reads the datalog.

I can look things over for you and give you some advice when I get a chance.
 

Skind

Member
Jun 28, 2018
65
4
8
119
IN
They will still work fine, megalog viewer just reads the datalog.

I can look things over for you and give you some advice when I get a chance.
Ok. I appreciate any and all advice. No rush, I'd like to get it running right, but I have other stuff going on too.
Is the paid version of megalog viewer worth it too?
 

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
9,602
5,796
204
31
Hillsborough county
Ok. I appreciate any and all advice. No rush, I'd like to get it running right, but I have other stuff going on too.
Is the paid version of megalog viewer worth it too?
I tune a lot of cars so for me it is worth it. It will open some extra features like ve analyzer this will allow you to autotune from a datalog. Since I do remote tuning this is a valuable tool to help dial things in after the initial tune session. Now autotune and ve analyzer are great tools but they won't replace the need to manually adjust fuel in some areas.
 

Skind

Member
Jun 28, 2018
65
4
8
119
IN
I was reading on how to update the firmware, and have a couple questions about it.
1. I have a MSPNP2 not a diypnp. Do I still need to use a boot jumper like the diypnp?
2. Is pulling the ignition coil fuse the only thing I have to do? Would unplugging the plug at the coil do the same thing?
Thanks!
 

a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
9,602
5,796
204
31
Hillsborough county
The newest version of TS has a built in firmware loader, no need to do any bootloader jumper changes.

Its under Tools drop box 'update/install firmware'

unplug the coil and disconnect the engine harness at the salt and pepper shakers.
 
Thread starter Similar threads Forum Replies Date
R Need MSPNP2 tune help/guidance Digital Self-tuning Forum 7
lamrith New MSPnP2 in 94 Mustang, need help getting stable idle once warmed up. Digital Self-tuning Forum 1
Meo68 Megasquirt MSPNP2/94 Mustang 302 Digital Self-tuning Forum 14
C Megasquirt MSPNP2/95 Mustang 347 Digital Self-tuning Forum 0
mustangpauly 90 mustang mspnp2 need help with startup. Digital Self-tuning Forum 8
G 95 Mustang gt MSPNP2. Newbie Digital Self-tuning Forum 5
94Vortechcobra Connecting Wideband to Megasquirt PNP2 Digital Self-tuning Forum 2
Wolf_Fox MsPnP2 8693 - what do I need? Digital Self-tuning Forum 3
J New MSPNP2 user! Digital Self-tuning Forum 50
H 89' w/Turbonetics 7668 & MSPNP2 Digital Self-tuning Forum 29
C Question about mspnp2 Digital Self-tuning Forum 11
R MSPNP2 for 95 GT Digital Self-tuning Forum 4
90sickfox 1988 turbo 331 TW heads mspnp2 Digital Self-tuning Forum 137
90sickfox Build Thread Dusty's... Money Problems. SMH 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 2357
MikeH686 mspnp2 reviews Fox 5.0 Mustang Tech 0
9 Help with tuning... Digital Self-tuning Forum 1
Mr.Roush02 2002 Stage 2 Roush Mustang "Factory" Tune 1996 - 2004 SN95 Mustang -General/Talk- 1
General karthief Do you really need a 'tune' or is it bs 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 62
M Tune up and cel code questions SN95 4.6L Mustang Tech 1
K The ole new guy cant tune bit.. 88 5.0 fox microsquirt Digital Self-tuning Forum 2
A Catless exhaust..Tune required? 2005 - 2009 Specific Tech 12
J MS3 Goldbox Spark cut limiter with TFI?? Digital Self-tuning Forum 2
D Can anyone adjust my tune for 42lb injectors? SCT X4 tuner Digital Self-tuning Forum 2
John Dirks Jr Digital Tuning new inj / maf - need tune? Fox 5.0 Mustang Tech 14
White Wolf Fresh Nitrous Tune 2005 - 2014 Specific V6 Tech 2
9 Can someone help me with my tune. Digital Self-tuning Forum 7
P Forced Induction Vortech Tuner in Atlanta Fox 5.0 Mustang Tech 0
PayUpSuka V1 S-trim tune help Digital Self-tuning Forum 4
E Fastlane Motorsports dyno tuning ? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 0
17P51GT Flex Fuel Tunes 2015+ (S550) Mustang -General/Talk 6
GodStang VE Analyze vs Tune Analyze Live Digital Self-tuning Forum 3
W 347 Header Size and exhaust Diameter 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 51
bmgstang Need help with tune high idle Digital Self-tuning Forum 7
M New Build PCM, Tuning, PATS SN95 4.6L Mustang Tech 0
C Microsquirt tuning and surging idle problems Digital Self-tuning Forum 7
M Need help tuning megasquirt with kenne bell supercharger Digital Self-tuning Forum 9
R 89' Stang - MS2PNP - Post tune - Surging issues Digital Self-tuning Forum 5
L 1997 Cobra Tune Question (and some background on the car) SN95 4.6L Mustang Tech 3
N Advice on EFI tuning solution on a tiny budget Digital Self-tuning Forum 5
Blucifer99 Pop and bang tunes...... best and safest way to make them? Digital Self-tuning Forum 4
LILCBRA 14point7 Spartan 2 install, Holley 4150 tuning, & exhaust escapades 1974 - 1978 Mustang II Talk & Tech 105
1 SCT BA5000 MAF Transfer Function Digital Self-tuning Forum 3
G Engine Tuning options? No one here in AZ seems to do it Fox 5.0 Mustang Tech 9
P What tuning platform are you using? Digital Self-tuning Forum 0
Jacobhollis Unknown tune! 2010 - 2014 Specific Tech 1
S New throttle body tune required 2005 - 2014 S-197 Mustang -General/Talk- 6
94tang Electrical or tune related? Digital Self-tuning Forum 15
White Wolf Fresh Dyno Tune - Voodoo Racing 2005 - 2014 Specific V6 Tech 17
Z Bama SCT x3 tune settings SN95 4.6L Mustang Tech 0
R ECU Tuning Help 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 13
Similar threads