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

no spark no start

  • Thread starter Thread starter mutjny
  • Start date Start date Feb 11, 2024
  • Tags Tags
    crank but no spark no spark
M

mutjny

New Member
Feb 11, 2024
5
0
1
north carolina
Feb 11, 2024
#1
  • Feb 11, 2024
  • #1
pulled into my driveway the other day and then the next morning no start just crank. i have fuel pressure and maf counts but 0 spark on my handheld tuner. i replaced my coil packs, cleaned both crank and cam position sensor and checked all of my grounds and still nothing. i do have 12v running through all of my coil pack pigtails so there's something stopping the coil packs from activating. any ideas? 2001 GT
 
Y

Yel2002GTAuto

Active Member
Sep 26, 2022
233
26
38
Granit City, IL
Feb 16, 2024
#2
  • Feb 16, 2024
  • #2
Sounds like fuel pump issue to me..if you are getting voltage you should be good...start with fuel filter to make sure it is not clogged and cheap fix first...also check fuses and relays...easy place to start..

Ed
 
M

mutjny

New Member
Feb 11, 2024
5
0
1
north carolina
Feb 22, 2024
#3
  • Feb 22, 2024
  • #3
i’ve done both of those it’s purely spark related issue. i have 40 psi at the rail. i actually did both filter and pump within the last 3 months as well
 

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
Apr 3, 2009
2,971
1,617
153
nevada
Feb 22, 2024
#4
  • Feb 22, 2024
  • #4
Any lights on dash? Like it sounds alarm related.
 
M

mutjny

New Member
Feb 11, 2024
5
0
1
north carolina
Feb 22, 2024
#5
  • Feb 22, 2024
  • #5
nickyb said:
Any lights on dash? Like it sounds alarm related.
Click to expand...
no pats light or anything just the normal ones you get before starting. i was thinking of the pats system and the battery on my key is completely dead. could this be causing something at all. one of my buddies said the key sends a signal to the ignition module but i don’t know how true that is
 

Mcmahst

5 Year Member
Jan 19, 2021
666
261
83
Laguna Woods CA, fort Mohave AZ
Feb 22, 2024
#6
  • Feb 22, 2024
  • #6
I believe the keys battery sends the key’s unique ID to the PATS system. But a battery in it and try. Or, there are quite a few PATS system diagnostics processes on the internet.
 
Y

Yel2002GTAuto

Active Member
Sep 26, 2022
233
26
38
Granit City, IL
Feb 23, 2024
#7
  • Feb 23, 2024
  • #7
Check the crank trigger sensor for good connection...also check the wires for it..
 
Y

Yel2002GTAuto

Active Member
Sep 26, 2022
233
26
38
Granit City, IL
Feb 23, 2024
#8
  • Feb 23, 2024
  • #8
That would cause no spark but should pop a code..
 
Reactions: Mcmahst

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
Apr 3, 2009
2,971
1,617
153
nevada
Feb 23, 2024
#9
  • Feb 23, 2024
  • #9
mutjny said:
no pats light or anything just the normal ones you get before starting. i was thinking of the pats system and the battery on my key is completely dead. could this be causing something at all. one of my buddies said the key sends a signal to the ignition module but i don’t know how true that is
Click to expand...
Yes that can cause a crank no start, get the battery changed and let us know.
 

nickyb

I gotta say i never painted my nuts, Never Ever
15 Year Member
Apr 3, 2009
2,971
1,617
153
nevada
Feb 24, 2024
#10
  • Feb 24, 2024
  • #10
It saturday, change that battery already.
 
Reactions: Mcmahst
M

mutjny

New Member
Feb 11, 2024
5
0
1
north carolina
Mar 3, 2024
#11
  • Mar 3, 2024
  • #11
i changed it but still have the issue i’ve just been busy with work and school and haven’t had time to work on it. i checked the pigtail for my crank sensor and i have 10 volts. do you know if that’s normal? haven’t been able to find it anywhere
 

Mcmahst

5 Year Member
Jan 19, 2021
666
261
83
Laguna Woods CA, fort Mohave AZ
Mar 3, 2024
#12
  • Mar 3, 2024
  • #12
I found this on the all forms forum:

Sensor

You may have already done this, but the sensor is easy to check before you remove it from the car. (Chris is absolutely correct, you need to do the work from under the car).

Test:

1. Disconnect the sensor and with the motor off, switch ON, connect a voltmeter and check for battery voltage to the connection you took from the sensor (this lets you know that the problem is NOT in the wiring).

2. Connect the voltmeter to the sensor itself, and select AC on the voltmeter. Put a breaker bar on the crank and watch the voltmeter as you slowly turn the crank. You should see the voltage move between 0 and 0.5 volts.

3. If you don't have any voltage changes on the sensor, it is bad.

Best of luck. I hope this fixes your car.

tripleblack

I hope it helps, Steve.
 
M

mutjny

New Member
Feb 11, 2024
5
0
1
north carolina
Mar 5, 2024
#13
  • Mar 5, 2024
  • #13
Mcmahst said:
I found this on the all forms forum:

Sensor

You may have already done this, but the sensor is easy to check before you remove it from the car. (Chris is absolutely correct, you need to do the work from under the car).

Test:

1. Disconnect the sensor and with the motor off, switch ON, connect a voltmeter and check for battery voltage to the connection you took from the sensor (this lets you know that the problem is NOT in the wiring).

2. Connect the voltmeter to the sensor itself, and select AC on the voltmeter. Put a breaker bar on the crank and watch the voltmeter as you slowly turn the crank. You should see the voltage move between 0 and 0.5 volts.

3. If you don't have any voltage changes on the sensor, it is bad.

Best of luck. I hope this fixes your car.

tripleblack

I hope it helps, Steve.
Click to expand...
by looking for volts on the sensor when you crank, do you think they mean on the magnetic tip or the actual sensor connected because i don’t see how it could get voltage without it being plugged in
 

Mcmahst

5 Year Member
Jan 19, 2021
666
261
83
Laguna Woods CA, fort Mohave AZ
Mar 5, 2024
#14
  • Mar 5, 2024
  • #14
The second test is to verify the pickup coil is producing an output in AC volts, not DC volts like the first step. By turning the crank past the sensor, it induces a signal voltage, the 0.5 indicated. The probes should go directly on the unplugged sensor.

Post the results of both steps. Good luck.
 
You must log in or register to reply here.

Similar threads

M
Help! 2003 GT misfire when hot
  • Modular03
  • Feb 10, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
314
SN95 4.6L Mustang Tech Feb 13, 2026
Mustang5L5
8
Electrical Crank-no start ... no spark ... no injector pulse, was it something I did? (redux)
  • 85gtCOBRA
  • Oct 28, 2025
  • Fox 5.0 Mustang Tech
Replies
2
Views
496
Fox 5.0 Mustang Tech Oct 29, 2025
85gtCOBRA
8
K
Engine 2000 Mustang GT - Fuel issue post-blown spark plug repair
  • kenster1092
  • Feb 26, 2026
  • SN95 4.6L Mustang Tech
Replies
4
Views
288
SN95 4.6L Mustang Tech Mar 10, 2026
kenster1092
K
A
1987 5.0 speed density Foxbody crank no start
  • Alan2204
  • May 23, 2026
  • Fox 5.0 Mustang Tech
Replies
10
Views
150
Fox 5.0 Mustang Tech May 30, 2026
Mcmahst
F
1986 mustang no start
  • foxyjamss221
  • Oct 11, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
4
Views
295
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Oct 13, 2025
foxyjamss221
F
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L 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?