Stumped (Page 4/6)
theogre JUL 16, 10:14 AM

quote
Originally posted by cartercarbaficionado:
use graphite dry lube. it's the correct stuff

No.
E-brake/P-brake Cables since 70's are mostly plastic liner in metal shells for outside jacket & hate nearly all lube including Dry Graphite powder.

So If the parking brake cables "need greasing" then the cables are Dead & need Replacing.

Example: If you have Factory cables or old cables w/ metal outer jackets often the jackets have "rotted" ends @ frame, caliper or both that make the cable to bind & no lube will help you.
1 way to check this is pull on the jacket & watch both ends. Often the jacket has rotten thru @ the ends but look ok until you pull the jacket & ends stay put.
But ends may not rotten thru but rust can still cause binding.

New cables have the plastic on the cable instead inside of the jacket but still hate all lube. The new cables also have plastic on the outside to prevent rusting is likely require to meet current US EU etc rules. Problem w/ that is the plastic is often remove to crimp the ends like any wiring w/ crimp ends or the plastic just cracks & allows "water" to get in at that points. To help seal those areas, use thin coat of Silicon or Permatex Green Label Brake Grease. Those prevent "water" getting in but won't attack plastic.

Example: From my old cradle replace w/ P-cables attach because their "frozen" even after had new cables years before... (just had better cradle @ time the motor lost timing gear.) Both ends, the outer plastic cracked letting "water" in there. Result Rust binding enough so can't move the core cable even w/ pliers pulling on metal tip.
Gizmo0816 JUL 19, 07:42 PM
Ok so I just tested the fuel pressure, it's at a solid 10 while idling and after it turned off slowly lost pressure and seems to be sitting around 7 - 8. Took about around 10 seconds I'd say to drop.

[This message has been edited by Gizmo0816 (edited 07-19-2024).]

Patrick JUL 19, 07:50 PM
Just so we get an idea of how accurate this gauge is... what is the maximum pressure it goes up to?

[This message has been edited by Patrick (edited 07-19-2024).]

Gizmo0816 JUL 19, 07:52 PM

quote
Originally posted by Patrick:

Just so we get an idea of how accurate this gauge is... what is the maximum pressure it goes up to?



140, but it is solid on 10.
Gizmo0816 JUL 19, 07:54 PM

quote
Originally posted by Gizmo0816:

140, but it is solid on 10.



It still hasn't dropped anymore than where it rested so i take that as a good sign tho
Patrick JUL 19, 08:00 PM

Unfortunately, it might actually be a whole lot less.


quote
Originally posted by Patrick Here:

One comment I do have about your fuel pressure gauge though, is that when measuring fuel pressure of about 12psi max, I suspect that a gauge that measures up to 140psi is not going to be very accurate at those low pressures.
Gizmo0816 JUL 19, 08:08 PM

quote
Originally posted by Patrick:


Unfortunately, it might actually be a whole lot less.

[QUOTE]Originally posted by Patrick Here:

One comment I do have about your fuel pressure gauge though, is that when measuring fuel pressure of about 12psi max, I suspect that a gauge that measures up to 140psi is not going to be very accurate at those low pressures.

[/QUOTE]
I can't seem to find any lower than 100 psi, but I just don't suspect fuel is the issue here. I still gotta do that rebuild, check all the grounds closely, I did a glance at 2 of em early they didn't seem corroded, and do that test theogre suggested with the ecm.

It runs strong and starts great when it doesn't die shortly after its very specific scenario which does seem to be heat related.

[This message has been edited by Gizmo0816 (edited 07-19-2024).]

Patrick JUL 19, 08:24 PM

quote
Originally posted by Gizmo0816:

I can't seem to find any lower than 100 psi, but I just don't suspect fuel is the issue here.



It's too bad you couldn't have gotten a gauge as pictured in that same thread. It would've helped to absolutely rule out any possible fuel pressure issue. My first Fiero was an '87 duke. I hated that engine (which is basically the same engine as the '88 without the balance shafts and weird oil filter arrangement).
Gizmo0816 JUL 19, 08:35 PM

quote
Originally posted by Patrick:

It's too bad you couldn't have gotten a gauge as pictured in that same thread. It would've helped to absolutely rule out any possible fuel pressure issue. My first Fiero was an '87 duke. I hated that engine (which is basically the same engine as the '88 without the balance shafts and weird oil filter arrangement).



I'll try to get my mitts on one. I might be able to get one today, just don't know if it'll work.
Gizmo0816 JUL 19, 09:25 PM

quote
Originally posted by Gizmo0816:

I'll try to get my mitts on one. I might be able to get one today, just don't know if it'll work.



Local store didn't have one i'll see if I can get one ordered online.