Stock 94 GT Microsquirt wont run/idle

Eric1

New Member
Feb 1, 2004
5
0
1
46
Kingsland, GA
Hey guys, not new to mustangs but new to tuning. Got a microsquirt to mess around with in anticipation of going turbo. Received today, hooked it up no problems (except finding an adapter for my laptop) and the car is all over the place. Idle goes to 900ish at start and then drops down to 300, bounces around for a bit and dies. I am not using a wideband yet. The "stock" tune sent had 30lb injectors which I changed to 19 or 200cc. One strange note is that there is a very loud "humming" noise coming from the intake manifold area, could be the injectors cycling?? Never heard anything like it in the probably 8 mustangs I have owned, and certainly wasn't doing it before. Not sure I can even log anything as the car doesn't run long enough. I was planning on contacting efisource but this seems to be the best spot for mustang specific questions. Plus apparently I havnt been in here in 15 years. Thanks for any help.
 
  • Sponsors(?)


a91what

SendMeUrDataLog
Mod Dude
Apr 6, 2011
10,035
5,951
204
31
Hillsborough county
The humming is the idle valve, likely needs the frequency changed to quite it down some.
The base tunes they send are just good enough to get the car running, the fact that it runs at all is a good sign.

First thing I would do is play around in the tuning software and get familiar with it. I have videos and a tech thread you can read through. Just hover over my signature to expand it and there are links available.
 

Eric1

New Member
Feb 1, 2004
5
0
1
46
Kingsland, GA
Awesome thanks I will check them out.
The humming is the idle valve, likely needs the frequency changed to quite it down some.
The base tunes they send are just good enough to get the car running, the fact that it runs at all is a good sign.

First thing I would do is play around in the tuning software and get familiar with it. I have videos and a tech thread you can read through. Just hover over my signature to expand it and there are links available.
 
Thread starter Similar threads Forum Replies Date
02 281 GT LMR is making an ‘89-‘93 stock intake tube repro 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 11
Gs87GT Fox Questions on stock suspension rebuild. 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 5
R 2012 mustang stock headlights 2005 - 2014 S-197 Mustang -General/Talk- 3
Foxslider SOLD WTB: 87-93 stock foxbody axle out of 8.8. Drivetrain Parts 0
vristang Stock IRCM with Taurus fan 2.3L (N/A & Turbo) Tech 2
C Biggest injectors you can run on stock ecu? Fox 5.0 Mustang Tech 43
P Progress Thread Almost Stock Rebuild (89 GT) 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 22
C Stock rocker adjustment with a e303 cam Fox 5.0 Mustang Tech 22
C Brakes Stock fox front brakes with sn95 rear Fox 5.0 Mustang Tech 8
Habu135 Fox : How Much Power Does a Stock 1993 Cobra Make? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 7
S Stock 1993 LX 5.0......What Bolt On Mods ? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 11
V 11r 190 on 92 stock bottom end? Fox 5.0 Mustang Tech 10
James V Fox How much boost is safe to run. Stock engine 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
NickMadore Stock MAF with upgraded Throttle body? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 17
John Dirks Jr Stock crank pulley 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 6
S Fuel 1995 stock Mustang EFI vs aftermarket TBI or Edelbrock injection? Jag Project Car Fox 5.0 Mustang Tech 13
S Rear Axle and Stock Fan/Shroud help w/ 351w 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 0
T Suspension Mustang II stock upper control arm removal? 1974 - 1978 Mustang II Talk & Tech 5
EX-SSP WTB/Trade Need stock alternator pulley Engine and Power Adder 1
MrPerfect2 Will steeper gears put more stress on AOD and a stock 5.0 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 34
6 Biggest rear tire stock height 1966 Mustang??? 1965 - 1973 Classic Mustangs -General/Talk- 0
D Aftermarket CAM closest to stock 94/95? 1994 - 1995 Specific Tech 16
MrPerfect2 Timing a stock GT 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 45
D Carb Recommendations for 68 stock 289 2V Classic Mustang Specific Tech 1
S High flow cats on a Stock 2V Mustang GT? Yay or nay? 1996 - 2004 SN95 Mustang -General/Talk- 1
R Stock crank limit numbers? 1996 - 2004 SN95 Mustang -General/Talk- 11
Noobz347 Forced Induction How Much Power Will I Make? Stock vs. Supercharged, Side - By - Side 2015+ (S550) Mustang -General/Talk 0
Hoytster For Sale Fluidampr Harmonic Balancer - Stock 302 Balance - Used Engine and Power Adder 1
E Custom mod to 2002 gt stock headlights SN95 4.6L Mustang Tech 1
Infoxicated5.0 Stock clutch cable adjustment question 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 17
S Electrical Stock tach wont work plugged into msd6al box? Fox 5.0 Mustang Tech 27
Foxslider Camber adjustment w/ stock stuff 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 10
JMGlasgow Stock block or? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 25
Red50Fox Drivetrain 8.8 Diff Covers for Stock(ish) GT Fox 5.0 Mustang Tech 16
Habu135 Stock 14K mile '92 Notch Dyno Video 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 22
Olivethefet Stock Style Rear LCA Bushings 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 0
P Digital Tuning Need help with returning to stock (SCT) SN95 4.6L Mustang Tech 27
B Engine Sound normal ?gt stock everything. Owned for 1 year 2005 - 2009 Specific Tech 1
P Returning to stock question SN95 4.6L Mustang Tech 5
L For Sale 2017 Mustang gt stock hood lightening blue Interior Exterior Parts 4
D Which aftermarket cam is closest to stock drive-ability? 1994 - 1995 Specific Tech 8
Hoytster Progress Thread Darn Stock Block Problems - Putting together the pieces Fox 5.0 Mustang Tech 53
V 1992 GT Aftermarket radio-to-Stock radio/amp Mustang Sound & Shine All 4
N For Sale 1993 LX Hatchback Fox Body Mustangs For Sale (1979-93) 4
90sickfox 50 % off mustang unlimited in stock stuff 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 14
MrPerfect2 Fox My stock 91 GT performs better on 87 gas 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 11
B Stock flywheel 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 2
JMGlasgow Expired WTB stock egr plate and TB Engine and Power Adder 3
James V Fox Stock is going up, boys!!! 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 97
J Electrical 86 mustang stock gauge reads empty Fox 5.0 Mustang Tech 4
Similar threads