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Technical => Engine Tech => Topic started by: Clayton on October 15, 2007, 11:13:51 AM

Title: Cat not starting in mornings
Post by: Clayton on October 15, 2007, 11:13:51 AM
Here lately she just hasnt wanted to start without a little motivation.

It cranks real easy, got a new coil and ignition module. fresh tune up


My mind is tellin me fuel pumps

what would you guys say?
Title: Cat not starting in mornings
Post by: thunderjet302 on October 15, 2007, 11:38:56 AM
The T-bird or the Cat? See what your fuel pressure is before swaping pumps. I've done it and it sucks :hick:
Title: Cat not starting in mornings
Post by: vinnietbird on October 15, 2007, 04:28:27 PM
Have you checked the battery and starter?
Title: Cat not starting in mornings
Post by: CougarSE on October 15, 2007, 05:10:05 PM
Quote from: thunderjet302;182610
The T-bird or the Cat? See what your fuel pressure is before swaping pumps. I've done it and it sucks :hick:

Quote from: vinnietbird;182645
Have you checked the battery and starter?

Haha Neither one of you read his post did you?
Title: Cat not starting in mornings
Post by: vinnietbird on October 15, 2007, 05:12:55 PM
I read it,I guess I just didn't absorb what I read.I have an H.O Mark VII pump if you need it.
Title: Cat not starting in mornings
Post by: Clayton on October 15, 2007, 06:30:17 PM
Dont believe the mark one will work. 83 is most likely gonna be different. and I got 2 pumps.
Title: Cat not starting in mornings
Post by: 88turbo on October 15, 2007, 08:49:57 PM
it doesnt want to start because its chasing the bird all night ;)
Title: Cat not starting in mornings
Post by: Chuck W on October 15, 2007, 08:55:03 PM
What's the fuel pressure?

What do you mean by "a little motivation"?
Title: Cat not starting in mornings
Post by: thunderjet302 on October 15, 2007, 09:47:11 PM
Quote from: CougarSE;182654
Haha Neither one of you read his post did you?


I thought it said Car not Cat:hick:
Title: Cat not starting in mornings
Post by: Ductape91 on October 15, 2007, 10:10:57 PM
how old is the fuel filter?
by "a little motivation" do you mean you gotta pump the pedal a few in the morning?
Title: Cat not starting in mornings
Post by: Clayton on October 16, 2007, 11:25:07 AM
little motivation as in starting fluid... but that has come to no avail and left me driving the bird.

Ill have to find my pressure checker or snag one from school.
Title: Cat not starting in mornings
Post by: Chuck W on October 16, 2007, 11:37:23 AM
How did it run once started?
Title: Cat not starting in mornings
Post by: Clayton on October 16, 2007, 05:56:35 PM
it ran fine. it had a stumble every now and then, but i thought that was because of the py plug wires.

it had spiked 10 psi and bled back to 0
Title: Cat not starting in mornings
Post by: CougarSE on October 16, 2007, 06:08:32 PM
You ever change the fuel filter?
Title: Cat not starting in mornings
Post by: Chuck W on October 16, 2007, 06:21:00 PM
Are you talking about fuel pressure?

Only 10 psi???

If that's what you meant, then it's possible the fuel pressure regulator is bad.  Pressure should be 39psi and it should hold that for a while.

Try that first.
Title: Cat not starting in mornings
Post by: CougarSE on October 16, 2007, 08:58:45 PM
Pull off the hose going to the FPR and see if gas comes out when you turn the key.
Title: Cat not starting in mornings
Post by: cougarcragar on October 16, 2007, 09:06:12 PM
That engine has a fuel pressure regulator?
Title: Cat not starting in mornings
Post by: Chuck W on October 16, 2007, 09:22:35 PM
The regulator on the CFI unit in on the TB itself.  There is no hose going to it. 
If he only had 10 psi of pressure, it's either the regulator or the HP inline pump.  The regulator is the cheaper and easier thing to replace first.
Title: Cat not starting in mornings
Post by: CougarSE on October 16, 2007, 09:24:19 PM
Doh!  I should have known that owning that car!
Title: Cat not starting in mornings
Post by: Clayton on October 17, 2007, 11:15:21 AM
yessir im only getting 10 psi per my pressure checker. but the gauge bleeds down real quick with the key on.


I shall look into the regulator, its old anyways.
Title: Cat not starting in mornings
Post by: JeremyB on October 17, 2007, 12:13:47 PM
Probably the regulator. I had the same problem, although mine was caused by some junk jamming the check valve open.

You can verify whether it is the FPR or the FP itself by installing a fitting with a cap in it on the return side of the CFI unit. If pressure holds, you know it is the FPR, if pressure still drops, you know it is the FP.
Title: Cat not starting in mornings
Post by: CougarSE on October 17, 2007, 12:21:27 PM
Quote from: CougarSE;182842
You ever change the fuel filter?

;)
Title: Cat not starting in mornings
Post by: Clayton on October 17, 2007, 03:24:15 PM
Quote from: CougarSE;182842
You ever change the fuel filter?


yup.
Title: Cat not starting in mornings
Post by: Clayton on October 18, 2007, 05:20:17 PM
well, I changed the regulator. No start. No change.

So I replaced the In-line pump. Fired right up. Now if she starts in the morning Ill be happy!
Title: Cat not starting in mornings
Post by: Chuck W on October 18, 2007, 05:37:45 PM
Cool. 

Did you happen to recheck the pressure to see what it was and if it held?
Title: Cat not starting in mornings
Post by: Clayton on October 18, 2007, 05:39:26 PM
39-40 psi. :D
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