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No Start After Rebuild.

  • Thread starter Thread starter 85rkyboby
  • Start date Start date Apr 4, 2015

85rkyboby

Active Member
Mar 2, 2011
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South ATL
Apr 4, 2015
#1
  • Apr 4, 2015
  • #1
Hey guys,

Well I just finished my GT40 rebuild and it crank but won't start. I got it to start for a short second but then the rpm's dropped off unless I held the throttle down. My associate wasn't around to hold the throttle for me while I make adjustments. I for sure have spark to the plugs, my jets squirt fuel when the throttle is applied, & I stabbed the distributor in @ TDC with the rotor button pointing to the #1.

The engine is a GT40 Exploder engine. All stock except for a TFS1 Cam, Stealth Intake, FRPP Balancer & Oil Pump Shaft, TrickFlow Valve Springs, & an Edelbrock 1406. I'm running a Distributor from a 85 Mustang, along with MSD 6AL and MSD Blaster 2 Coil. Not sure what else to tell y'all, any questions or comments to help please do.

Thanks,
Garrick A.R.
 

liljoe07

5 Year Member
Feb 18, 2009
1,622
363
124
Cartersville,Ga
Apr 4, 2015
#2
  • Apr 4, 2015
  • #2
Turn the distributor clockwise some and then try again. Keep doing that to see if it will start.
 
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85rkyboby

Active Member
Mar 2, 2011
923
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South ATL
Apr 4, 2015
#3
  • Apr 4, 2015
  • #3
liljoe07 said:
Turn the distributor clockwise some and then try again. Keep doing that to see if it will start.
Click to expand...
Thanks Joe. However I tried that as well, in a few positions. I pulled my plugs and they seem fine, they don't smell like gas or anything.
 

mikestang63

SN Certified Technician
Aug 27, 2012
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In the garage
Apr 5, 2015
#4
  • Apr 5, 2015
  • #4
@jrichker for crank no start checlist
 

rbohm

Founding Member
Apr 12, 2002
6,698
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204
tucson,az
Apr 5, 2015
#5
  • Apr 5, 2015
  • #5
since you got it to light off for a second or so, it sounds like not enough timing. advance it, and try again. keep doing that until it lights off and runs.
 

jrichker

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Dublin GA
Apr 6, 2015
#6
  • Apr 6, 2015
  • #6
Putting the distributor back in and setting the timing.

Revised 28-Jul-2013 to include warning about putting spark plug leads in a different location to attempt a to fix a distributor incorrectly installed.

You can forget about anything beyond this point if you don't have access to a timing light. You will never get the timing set right without one.


Putting the distributor back in is fairly simple. Pull #1 sparkplug, put your finger in the sparkplug hole, crank the engine until you feel compression. Then line up the TDC mark on the balancer with the pointer on the engine block.

The distributor starts out with the #1 plug wire lined up at about 12:00 with you facing it. Align the rotor to about 11:00, since it will turn clockwise as it slides into place.

Align the distributor rotor up with the #1 position marked on the cap, slide the distributor down into the block, (you may have to wiggle the rotor slightly to get the gear to engage) and then note where the rotor is pointing.
If it still lines up with #1 position on the cap, install the clamp and bolt. If not, pull it out and turn 1 tooth forwards or backwards and try again. Put the #1 spark plug back in and tighten it down, put the clamp on the distributor, but don't tighten it too much, as you will have to move the distributor to set the timing. Note that there is no such thing as one tooth off on a 5.0 Mustang if you follow the spark plug wire order on the distributor cap. If it doesn't align perfectly with #1 position, you can turn the distributor until it does. The only problem is that if you are too far one way or the other, you can't turn the distributor enough to get the 10-14 degree optimum timing range. Don't move the wires from the positions shown on the cap on fuel injected engines!!!! The #1 position cast into the cap MUST have the spark plug wire for #1 cylinder in it. Do it differently and the timing for the fuel injectors will be off. The computer uses the PIP sensor to time injector operation by sensing the wide slot in the PIP sensor shutter wheel. If the injector timing of #1 and the firing of #1 do not occur at the right time, the injector timing for all other cylinders will be affected.

Setting the timing:
Paint the mark on the harmonic balancer with paint -choose 10 degrees BTC or 14 degrees BTC or something else if you have NO2 or other power adder. I try to paint TDC red, 10 degrees BTC white and 14 degrees BTC blue.

10 degrees BTC is towards the drivers side marks.

Note: setting the timing beyond the 10 degree mark will give you a little more low speed acceleration. BUT you will need to run 93 octane to avoid pinging and engine damage. Pinging is very hard to hear at full throttle, so it could be present and you would not hear it.

Simplified diagram of what it looks like. Not all the marks are shown for ease of viewing.

ATC ' ' ' ' ' ' ' ' ' '!' ' ' ' ' ' ' ' ' ' BTC
---------------- > Direction of Rotation as viewed standing in front of the engine.

The ' is 2 degrees.
The ! is TDC
The ' is 10 degrees BTC
Set the timing 5 marks BTC. Or if you prefer, 5 marks towards the driver's side to get 10 degrees.

To get 14 degrees, set it 7 marks BTC. Or if you prefer, 7 marks towards the driver's side to get 14 degrees.

The paint marks you make are your friends if you do it correctly. They are much easier to see than the marks machined into the harmonic balancer hub.

At this point hook up all the wires, get out the timing light. Connect timing light up to battery & #1 spark plug. Then start the engine.

Remove the SPOUT connector (do a search if you want a picture of the SPOUT connector) It is the 2 pin rectangular plug on the distributor wiring harness. Only the EFI Mustang engines have a SPOUT. If yours is not EFI, check for a SPOUT: if you don’t find one, skip any instructions regarding the SPOUT
Warning: there are only two places the SPOUT should be when you time the engine. The first place is in your pocket while you are setting the timing and the second is back in the harness when you finish. The little bugger is too easy to lose and too hard to find a replacement.

Start engine, loosen distributor hold down with a 1/2" universal socket. Shine the timing light on the marks and turn the distributor until the mark lines up with the edge of the timing pointer. Tighten down the distributor hold down bolt, Replace the SPOUT connector and you are done.

The HO firing order is 1-3-7-2-6-5-4-8.
Non HO firing order is 1-5-4-2-6-3-7-8

 
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85rkyboby

Active Member
Mar 2, 2011
923
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South ATL
Apr 6, 2015
#7
  • Apr 6, 2015
  • #7
Thanks everyone I got it. I guess I had fuel in the carb still and that gave me the short start. All I had to do was prime the lines.
Car feels GREAT! So smooth through the "power"band.
 

rbohm

Founding Member
Apr 12, 2002
6,698
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204
tucson,az
Apr 8, 2015
#8
  • Apr 8, 2015
  • #8
85rkyboby said:
Thanks everyone I got it. I guess I had fuel in the carb still and that gave me the short start. All I had to do was prime the lines.
Car feels GREAT! So smooth through the "power"band.
Click to expand...

it always seems to be the easy things that trip us up. i guess we should have made sure that you had fuel to the carb as well as dealing with the timing.
 
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85rkyboby

Active Member
Mar 2, 2011
923
96
39
South ATL
Apr 8, 2015
#9
  • Apr 8, 2015
  • #9
Absolutely right! Lol glad it was something easy!
 
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