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  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

Urgent advice.

  • Thread starter Thread starter Gilroy gonzales
  • Start date Start date Mar 18, 2023
G

Gilroy gonzales

New Member
Mar 4, 2023
16
1
3
Mar 18, 2023
#1
  • Mar 18, 2023
  • #1
I currently just rebuilt my motor yet when I was driving today testing it out it drove fine a couple hours later I started driving again to test it and it likes to idle rough sometimes it’ll drop down in rpm’s and then die then I’ll turn it on and it’ll be fine but only when I come to a complete stop it’ll die I then start accelerating barely having my foot on the gas technically just crusing and the car likes to shake yet I just put in new motor mounts and like I said a whole engine rebuild I was thinking if it could be a bad fuel pump or an egr valve or my terminals on my battery the first start up It didn’t turn on then I moved the positive wire and it turned on but I only tightened it but I want peoples advice before I go start buying more parts I’m kind of frustrated since I just rebuilt the whole motor.
 
Last edited: Mar 18, 2023
R

rockyracoon

10 Year Member
Nov 23, 2005
874
27
49
margate NJ
Apr 4, 2023
#2
  • Apr 4, 2023
  • #2
Any codes? Good fuel pressure? Any backfiring? Good vacuum numbers?
 
S

Shuttleman83

Active Member
Jun 30, 2019
239
13
28
USA
Apr 4, 2023
#3
  • Apr 4, 2023
  • #3
What kind of flywheel? Iron or Steel?
 
Y

Yel2002GTAuto

Active Member
Sep 26, 2022
233
26
38
Granit City, IL
Apr 8, 2023
#4
  • Apr 8, 2023
  • #4
Sounds like an IAC issue or maf...when you say rebuilt...was the compression changed, heads, cams, etc..or just a stock replacement rebuild...could just be low fuel trim settings which could cause the...need more info on build...
 
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