It has one on the dash, yes.
Sarah's 1991 Camaro
- Thread starter TransAmDan
- Start date
AmericanThunder
Super Moderator
The fuel regulator needs to hold a vacuum, see post 53. If you have a vacuum tester (like a mighty vac) you could test it.
If they go open circuit it thinks its -40 degc or similar and dumps on shed loads of fuel, don't know what happens if it goes short circuit. Certainly something to check. I'm not getting any fuel at all in the cylinders.
AmericanThunder
Super Moderator
Hmmmm, Henry wasn’t quite what I had in mind.
This is a mighty vac!
CTA Tools 7000 MityVac Vacuum Bleed and Test Kit : Amazon.co.uk: Automotive
CTA Tools 7000 MityVac Vacuum Bleed and Test Kit : Amazon.co.uk: Automotive
www.amazon.co.uk
AmericanThunder
Super Moderator
The IAT went bad on the Fiero. It didn’t fill the intake with fuel but I’m struggling to remember what the symptoms were. Sure it is documented on here somewhere?
Found a post where you replaced 3 sensors on the Fiero, https://www.solent-renegades.co.uk/...o-your-vehicle-today.12964/page-35#post-62868
AmericanThunder
Super Moderator
Oh yes. Jogs the memory a little.
AmericanThunder
Super Moderator
Come on Dan. So much momentum and so many things eliminated.
Keep going.
Keep going.
AmericanThunder
Super Moderator
I’ve found the fix for Sarah’s Camaro...
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Day off tomorrow, so should be able to get some time on it. Been busy in the evenings, and actually in a meeting now, half hour break at 1pm, then they go on until 10pm, although I wont stick on it that long, probably come off at 6pm. To do some other work.
We know there is fuel pressure at the schraider valve, good voltage at the injectors, all 6 cant go duff at the same time, so it must be lack of fuel. What can stop fuel in the fuel rail from getting from the 'in pipe' to the injectors?
No holes in the diaphram, tinly little hole in the center, 2mm diameter or less, surprising all the fuel the car needs at WOT can pass through that.
Tempted to get a new diaphram, and a rebuild kit, all the orings for injectors. Then take the fuel rail off and give it a good clean and know I have all the seals to put it back together.
We know there is fuel pressure at the schraider valve, good voltage at the injectors, all 6 cant go duff at the same time, so it must be lack of fuel. What can stop fuel in the fuel rail from getting from the 'in pipe' to the injectors?
No holes in the diaphram, tinly little hole in the center, 2mm diameter or less, surprising all the fuel the car needs at WOT can pass through that.
Tempted to get a new diaphram, and a rebuild kit, all the orings for injectors. Then take the fuel rail off and give it a good clean and know I have all the seals to put it back together.
Very nice for an unloved car, they cant have enjoyed driving it for that low milage, seems a waste to me. They seem confused of what it is "I’ve found the fix for Sarah’s Camaro...
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MUSTANG PONTIAC DODGE CORVETTE"
If I popped that in the garage it would certainly surprise Sarah.
When I took the diaphram thingy out, it was very hard to push it in by hand, I guess there is a spring in there that gets pulled by the vacuum, if I struggle to move it by hand it would be hard for vacuum to move it. Considering when you remove a vacuum pipe on the intake you can feel a light suction, I cant picture that light suction moving this diaphram, perhaps its seised up inside?
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Found some information on what goes on in the fuel pressure regulator
AmericanThunder
Super Moderator
The fuel doesn’t flow through that hole. All the fuel movement takes place under that?
My thinking if the fuel comes in through the tiny hole or the slot, and the pressure regulator works as a plug between the two.
My question is, if you take the regulator out, should you be able to move it by hand? I couldn't appear to budge it even a mm.
So where this hole is, there is something ment to move there? It does appear to be various metals, perhaps something happening inside the rails?
My question is, if you take the regulator out, should you be able to move it by hand? I couldn't appear to budge it even a mm.
So where this hole is, there is something ment to move there? It does appear to be various metals, perhaps something happening inside the rails?
AmericanThunder
Super Moderator
My understanding is that the rubber diaphragm controls the operation of a valve located under the circular disk. The fuel flow enters under the disk, passes through the valve and exits to the fuel rail. The amount of vacuum determines how high the valve is lifted and therefore how much fuel flows. The picture you posted shows that quite nicely I thought.
But, I have never had one apart so feel free to correct me.
But, I have never had one apart so feel free to correct me.
The value in the diaphram dosn't appear to move, but I guess it wouldn't have to move much to function, even less than 1mm may be enough travel for operation.
They are only around £40 from rock auto, so perhaps worth just slinging a new one in there and any other seals I may need.
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