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Username Post: HP EFI running, RPM stall!        (Topic#282388)
moonsteel 
Forum Newbie
Posts: 40
moonsteel
Loc: Ottawa, ON, Canada
Reg: 04-17-12
06-10-12 03:04 PM - Post#2235498    

First start today, HP ECU, TPI harness et al.
Car starts and idles, but RPM reads stall!

ECU Not controlling spark.
MSD tach out is wired to IGN "A"

Thoughts?
1974 Z49 - Silver, 350, 4 spd, sidepipes
Holley HP EFI TPI Swap



 
Danny Cabral 
Member
Posts: 3149
Danny Cabral
Loc: Ellington, CT
Reg: 11-03-04
06-11-12 12:20 AM - Post#2235654    
    In response to moonsteel

Need more information:
Which ignition distributor?
Which ignition software setup?
Is it supposed to be controlling timing?
May God's Grace Bless You

'78 BRONCO: 508" stroker, TFS heads, Dominator MPFI & DIS, A/C, Lentech Strip Terminator AOD, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim-over steering, 4" lift, 35" tires


 
moonsteel 
Forum Newbie
Posts: 40
moonsteel
Loc: Ottawa, ON, Canada
Reg: 04-17-12
06-11-12 08:37 AM - Post#2235769    
    In response to Danny Cabral

  • Danny Cabral Said:
Need more information:
Which ignition distributor?



OEM points style vacuum advance.
Pertronix Ignitor II module.
MSD 6AL.
  • Quote:

Which ignition software setup?



“CD Box Tach Output or any 12V Square Wave (No Timing Control)”
  • Quote:

Is it supposed to be controlling timing?


No.

Only wiring added for ignition is a single wire from the 'tach out' spade on the MSD to the 'A' plug in the IGN.
1974 Z49 - Silver, 350, 4 spd, sidepipes
Holley HP EFI TPI Swap



 
Danny Cabral 
Member
Posts: 3149
Danny Cabral
Loc: Ellington, CT
Reg: 11-03-04
06-11-12 01:37 PM - Post#2235872    
    In response to moonsteel

So you're wired like Figure 8 - page 16 in the wiring manual below?
You're using the yellow/black wire (crank input), and is the Ignitor 2 a magnetic trigger or a ground pulse?
http://www.holley.com/data/TechService/Tech nical/1... (Holley Wiring Manual)
May God's Grace Bless You

'78 BRONCO: 508" stroker, TFS heads, Dominator MPFI & DIS, A/C, Lentech Strip Terminator AOD, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim-over steering, 4" lift, 35" tires


 
moonsteel 
Forum Newbie
Posts: 40
moonsteel
Loc: Ottawa, ON, Canada
Reg: 04-17-12
06-11-12 01:50 PM - Post#2235878    
    In response to Danny Cabral

  • Danny Cabral Said:
So you're wired like Figure 8 - page 16 in the wiring manual below?
You're using the yellow/black wire (crank input), and is the Ignitor 2 a magnetic trigger or a ground pulse?
http://www.holley.com/data/TechService/Tech nical/1... (Holley Wiring Manual)



1) Yellow/Black ('A' on the IGN plug) to MSD 6AL "tach output" spade.
2) Ignitor 2 is a magnetic trigger IIRC.
1974 Z49 - Silver, 350, 4 spd, sidepipes
Holley HP EFI TPI Swap



 
Danny Cabral 
Member
Posts: 3149
Danny Cabral
Loc: Ellington, CT
Reg: 11-03-04
06-11-12 02:02 PM - Post#2235883    
    In response to moonsteel

I believe you have it wired wrong.
The Ignitor 2 red wire connects to keyed/switched 12V.
the Ignitor 2 black wire connects to MSD's white wire.
http://www.pertronix.com/support/tips/default.aspx... (CD box wiring instructions)
http://www.pertronix.com/support/tips/pdf/msd6 seri... (CD box wiring diagram)

The rest of the wiring is Figure 8 - page 16 in the Holley wiring manual:
http://www.holley.com/data/TechService/Tech nical/1...
May God's Grace Bless You

'78 BRONCO: 508" stroker, TFS heads, Dominator MPFI & DIS, A/C, Lentech Strip Terminator AOD, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim-over steering, 4" lift, 35" tires


 
Lgib 
Member
Posts: 63
Lgib
Loc: new mexico
Reg: 01-18-06
06-11-12 04:07 PM - Post#2235930    
    In response to Danny Cabral

Is the computer online .I would think it would not start if it was not getting a rpm signal.
69 Camaro 383 sb,GTK650 turbo, Holley EFI HP Stealth Ram, DIS, Holley coils,
60-2 crank trigger, water meth injection, TH350, Gear Venders overdrive


 
moonsteel 
Forum Newbie
Posts: 40
moonsteel
Loc: Ottawa, ON, Canada
Reg: 04-17-12
06-12-12 07:34 AM - Post#2236155    
    In response to Lgib

  • Lgib Said:
Is the computer online .I would think it would not start if it was not getting a rpm signal.




Do I have to explicitly select online even when the car is being started/running?
1974 Z49 - Silver, 350, 4 spd, sidepipes
Holley HP EFI TPI Swap



 
moonsteel 
Forum Newbie
Posts: 40
moonsteel
Loc: Ottawa, ON, Canada
Reg: 04-17-12
06-12-12 07:35 AM - Post#2236158    
    In response to Danny Cabral

  • Danny Cabral Said:
I believe you have it wired wrong.
The Ignitor 2 red wire connects to keyed/switched 12V.
the Ignitor 2 black wire connects to MSD's white wire.
http://www.pertronix.com/support/tips/default.aspx... (CD box wiring instructions)
http://www.pertronix.com/support/tips/pdf/msd6 seri... (CD box wiring diagram)

The rest of the wiring is Figure 8 - page 16 in the Holley wiring manual:
http://www.holley.com/data/TechService/Tech nical/1...



I don't think it's wired incorrectly, I haven't changed anything since I installed it (I've had the Pertronix/MSD for over a year).

It matches this:
http://www.pertronix.com/support/tips/pdf/msd6 seri...

The only change this season is the Holley EFI.
(neither the Holley white or yellow loose wires are used)
1974 Z49 - Silver, 350, 4 spd, sidepipes
Holley HP EFI TPI Swap



Edited by moonsteel on 06-12-12 07:38 AM. Reason for edit: added information

 
Lgib 
Member
Posts: 63
Lgib
Loc: new mexico
Reg: 01-18-06
06-12-12 08:40 AM - Post#2236179    
    In response to moonsteel

Do I have to explicitly select online even when the car is being started/running?

No, but if you don't select online and motor is running it will show RPM stall. Do any the sensors show anything on the computer.
69 Camaro 383 sb,GTK650 turbo, Holley EFI HP Stealth Ram, DIS, Holley coils,
60-2 crank trigger, water meth injection, TH350, Gear Venders overdrive


 
moonsteel 
Forum Newbie
Posts: 40
moonsteel
Loc: Ottawa, ON, Canada
Reg: 04-17-12
06-12-12 08:49 AM - Post#2236184    
    In response to Lgib

  • Lgib Said:
Do I have to explicitly select online even when the car is being started/running?

No, but if you don't select online and motor is running it will show RPM stall. Do any the sensors show anything on the computer.



Yes.
I followed the quick start guide, all the sensors values made sense when I went through the prestart checks.
When the car was idling, I noticed it said RPM Stall!
Perhaps I didn't select "online". I'll verify.
1974 Z49 - Silver, 350, 4 spd, sidepipes
Holley HP EFI TPI Swap



 
Danny Cabral 
Member
Posts: 3149
Danny Cabral
Loc: Ellington, CT
Reg: 11-03-04
06-12-12 09:05 AM - Post#2236188    
    In response to moonsteel

Wait a second...this whole issue is happening because you're not "online" with the ECU?
Does the Data Monitor display proper sensor values or not?
Does the highlighted cursor float around on the Fuel & Timing Tables (in accordance to MAP & RPM)?
May God's Grace Bless You

'78 BRONCO: 508" stroker, TFS heads, Dominator MPFI & DIS, A/C, Lentech Strip Terminator AOD, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim-over steering, 4" lift, 35" tires


 
moonsteel 
Forum Newbie
Posts: 40
moonsteel
Loc: Ottawa, ON, Canada
Reg: 04-17-12
06-12-12 10:22 AM - Post#2236206    
    In response to Danny Cabral

I'll have to check, I do remember going online, but I have no idea if I did when I started the car for the first time. I just remember seeing RPM stall! but the car was idling.

1974 Z49 - Silver, 350, 4 spd, sidepipes
Holley HP EFI TPI Swap



 
moonsteel 
Forum Newbie
Posts: 40
moonsteel
Loc: Ottawa, ON, Canada
Reg: 04-17-12
06-16-12 07:46 AM - Post#2237784    
    In response to moonsteel

Needed to select online, oops.
1974 Z49 - Silver, 350, 4 spd, sidepipes
Holley HP EFI TPI Swap



 
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