Long cranking time...Update

"Nickel"

"Nickel"

S-Series Syco
So the sy seems to take a while to fire, but if I cycle the key 2 times and let the fuel pump prime fully both times it starts much quicker... So would I be wrong to assume the fuel pressure regulator is to blame?? I have not tested anything yet, just thought I would ask the hive first.
 
Last edited:
SY2455

SY2455

70's Veteran
Re: Long cranking time...

Re: Long cranking time...

It very well could be the FPR. Do you have the means to test it ? How close are you to Swanton,Ohio ?
 
Jimmy

Jimmy

Banned
Re: Long cranking time...

Re: Long cranking time...

Pull the vac line off the FPR and see if it smells like gas.Pull the dipstick and see if it smells like gas.If it does then busted FPR.
 
"Nickel"

"Nickel"

S-Series Syco
Re: Long cranking time...

Re: Long cranking time...

SY2455 said:
It very well could be the FPR. Do you have the means to test it ? How close are you to Swanton,Ohio ?
Click to expand...

I've got a cheep set of Gauges, and I'm by Mansfield. Your a bit north of me...
 
"Nickel"

"Nickel"

S-Series Syco
Re: Long cranking time...

Re: Long cranking time...

Jimmy said:
Pull the vac line off the FPR and see if it smells like gas.Pull the dipstick and see if it smells like gas.If it does then busted FPR.
Click to expand...

That sound simple enough, thanks jimmy!
 
"Nickel"

"Nickel"

S-Series Syco
Re: Long cranking time...

Re: Long cranking time...

Is the FPR an off the shelf part or a syty only part?
 
S

Static

Member
Re: Long cranking time...

Re: Long cranking time...

Make sure the fuel pressure is not bleeding off after its run and it sits for a while. Theres a check valve in the fuel pump that goes bad.
 
Flyin Ryan

Flyin Ryan

hated cuz he drives fords
Re: Long cranking time...

Re: Long cranking time...

Static said:
Make sure the fuel pressure is not bleeding off after its run and it sits for a while. Theres a check valve in the fuel pump that goes bad.
Click to expand...

My vote goes to this...
 
Don W.

Don W.

Stab it and steer it
Re: Long cranking time...

Re: Long cranking time...

Funny. My Sy does almost exactly the same thing.

Almost because: Normal start sequence when cold is crank and it starts within a few seconds but dies. Crank again and, usually, it stays running. HOWEVER if I crank for a moment, release the key before it starts then crank again it fires IMMEDIATELY.

BTW FP is correct during all of this.

Also it doesn't run really well until it goes to closed loop but not enough for it to be an issue. I don't really care about that. Possibility I suppose that these two are related but don't know.

Checked the above solutions, nothing. I'll check again, I'm changing plugs today anyway and already had plans to check FP. I never posted because I just thought it was a trait of my Sy.:roll:

I'll report I I find anything.
 
SY2932

SY2932

Administrator
Re: Long cranking time...

Re: Long cranking time...

Flyin Ryan said:
My vote goes to this...
Click to expand...

X3. You can get a fuel pressure gage from the auto chain stores for under $40. If the fuel pressure drops to zero immediately after the fuel pump primes the injectors like on my truck, that is your smoking gun. I always marvel at the people who have owned these trucks for years and don't own this basic MUST have piece of diagnostic equipment. So far, you don't seem like you are going to be one of them ;)...
 
SY2932

SY2932

Administrator
Re: Long cranking time...

Re: Long cranking time...

Jimmy said:
Pull the vac line off the FPR and see if it smells like gas.Pull the dipstick and see if it smells like gas.If it does then busted FPR.
Click to expand...

This is what the inside of my Kirban AFPR looked like before they replaced it for me for even though I didn't buy it directly from them :):

IMG_1940.sized.jpg

"You should NEVER have gas inside the vacuum line going to the AFPR. If you do, the diaphragm is bad"
 
Flyin Ryan

Flyin Ryan

hated cuz he drives fords
Re: Long cranking time...

Re: Long cranking time...

I have this issue right now in my mustang.. i've had it for at least a year and I know it's the check valve in the fuel pump but i've just been lazy to drop the tank and replace it even though it's only like an hour job.
 
"Nickel"

"Nickel"

S-Series Syco
Re: Long cranking time...

Re: Long cranking time...

Ok so I got around to testing the fuel pressure..
-screw on guage and 0 psi
-turn key on 42 psi then as soon as pump quits.... 0 psi..
-start sy, running 34 psi
-turn off pump primes for 2 secs up to 42psi then back to 0 psi.

So guess I need to take the bed off and look for this check valve:banghead:...and I'll get a FPR for sh#ts and giggles...
 
You must log in or register to reply here.
Top