• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

help with ignition or fuel problem

  • Thread starter Thread starter wbrockstar
  • Start date Start date Apr 16, 2010

wbrockstar

Member
Mar 31, 2010
45
5
18
Nashville, Tn
Apr 16, 2010
#1
  • Apr 16, 2010
  • #1
I recently replaced quite a few ignition and fuel parts to resolve some issues i was having.the problems i have now are different issues,but could be caused by fuel or ignition.its a 1991 gt turned back in to completely stock form.pulled all plugs and got 150psi in all cylinders.all 8 spark plugs are wet with fuel.its either getting too much fuel or the fuel isnt getting properly burned.its running but it only idles at about 600 rpm.if you step on the gas it sounds like the timing is off but ive got it set perfectly at 10 degrees.ive replaced the coil,pip module,ignition module,coil wire,fuel pump,relay,inertia switch,fuel press. regulater,and the computer.didnt have this problem before i removed a typhoon intake and replaced it with a stock intake.anyone have any ideas.the check engine light comes on until it warms up and then goes off,but the car doesnt run any better or any worse when the light goes out.any sensors that might cause this problem.my handheld code scanner pulled a 31 and 66 code with key on-engine off but i havent done a run test yet.the dist. cap,rotor,and wires are the only things i havent replaced so far.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
34
129
Apr 17, 2010
#2
  • Apr 17, 2010
  • #2
Check to make sure the EGR position sensor is plugged in and that it baselines under 0.50 V KOEO (but above 0.20 V).

On a semi-related note, EGR gasses are being introduced at idle, the car would idle like poop. Be sure your EGR valve isn't stuck open (from carbon build up).

Good luck.
 
You must log in or register to reply here.

Similar threads

B
Electrical Why does my fox body keep frying eecs
  • brandyn200
  • Jun 20, 2026
  • Fox 5.0 Mustang Tech
Replies
8
Views
486
Fox 5.0 Mustang Tech Jun 25, 2026
AeroCoupe
A
1987 5.0 speed density Foxbody crank no start
  • Alan2204
  • May 23, 2026
  • Fox 5.0 Mustang Tech
Replies
10
Views
558
Fox 5.0 Mustang Tech May 30, 2026
Mcmahst
C
Electrical Fuel Gauge...Help! What did I do or Didn't Do?
  • ChickenDeluxe
  • Sep 3, 2026
  • Fox 5.0 Mustang Tech
Replies
2
Views
232
Fox 5.0 Mustang Tech Sep 3, 2026
ChickenDeluxe
C
C
Electrical HELP! 1989 5.0 Stick, Voltage Bleed onto Ignition Trigger wire
  • ChickenDeluxe
  • May 14, 2026
  • Fox 5.0 Mustang Tech
Replies
7
Views
364
Fox 5.0 Mustang Tech May 24, 2026
ChickenDeluxe
C
Engine Random Misfire at idle.
  • Gulftown980x
  • Jul 29, 2026
  • SN95 4.6L Mustang Tech
Replies
11
Views
586
SN95 4.6L Mustang Tech Jul 31, 2026
squeak93
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?