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Throwing $$ @ loss of power ISSUE

Towards top is higher pressure.

Leave the injector pod off the TB and hook up fuel lines so you can adjust easily. If your fuel pump relay has a red wire with black clip on it? Run 12 volt power to it and fuel pump will run continuously while you turn screw to adjust pressure. When done, remove fuel lines, install injector pod, re-install fuel lines.
 
I'm I a KnuckleHead ??

eagle mark said:
Towards top is higher pressure.

Leave the injector pod off the TB and hook up fuel lines so you can adjust easily. If your fuel pump relay has a red wire with black clip on it? Run 12 volt power to it and fuel pump will run continuously while you turn screw to adjust pressure. When done, remove fuel lines, install injector pod, re-install fuel lines.
Click to expand...

Thank you Mark,
The tip you gave worked great, and saved a lot of frustration~~So I thought.
I made a jumper lead, and got the injector pod set-up , connected to fp/relay. No leaks.:D

The fp/gauge read 15.5~~~So I adjusted and adjusted. I adjusted the full range top/bottom and the gauge never moved from 15.5 :doah:

Why didn't I get any movement on the gauge ??? The spring still has the gold/coating on, no rust, diaphragm is new, the afpr mod went well ,no binding (went thru full range of adjustment on bench).

Here are some pics~

IMAG0037.jpg
IMAG0039.jpg
IMAG0038.jpg
IMAG0035.jpg
IMAG0040.jpg


Does anybody see any wrong with this???

Here is a pic of a adjustment tool I made, before mark's advice. I was adjusting with the complete TB installed~~It works but a (PITA):dunno:

IMAG0042.jpg


Please Help :dunno::dunno::dunno:
 
eagle mark said:
Is the return line hooked up?

Return line plugged up?

Gauge broke?

:dunno:
Click to expand...

Yes all hooked-up.
If I put the pod on the TB, and start it, it will run. Can I still have A return line clog??? What is the best procedure to check??? :dunno::dunno:

The gauge set-up is new (Did All the pic's show-up ~~ 5 total) ^^^^^ ??

thanks :D
 
FenderChest said:
(Did All the pic's show-up ~~ 5 total) ^^^^^ ??
Click to expand...
No! :dunno: There's six... :doah:

Should be able to blow through the return line. Or if you have a fitting just run a hose into a can and re-check pressure.

Is it a stock spring? Something is wrong?
 
eagle mark said:
No! :dunno: There's six... :doah:

Should be able to blow through the return line. Or if you have a fitting just run a hose into a can and re-check pressure.

Is it a stock spring? Something is wrong?
Click to expand...

Boy, my heart skiped a beat for a second.
I was at a frazzled point and didn't think the pics made it. I didn't catch the tool pic.

Yes ,the spring is stock . I checked Mr injector and the website states that there currently unavailable I'm at a loss at this point on the spring . I will blow check the lines tomorrow

going out for the evening

thank you Mark
 
Unless the gauge is broke? You found an issue! Who knows what the pressure is as it's pegged the gauge.
 
Are you trying to lower it or raise it?

I know I had trouble getting pressure above 14ish with the stock spring and adjustable regulator mod so I used an18psi spring from somewhere (forgot where). Seemed to get it up to around 15-16psi.
 
Right, but he says the spring is stock, made his regulator adjustable and it won't come down from 15+?

Something is wrong...
 
FenderChest said:
Yes all hooked-up.
If I put the pod on the TB, and start it, it will run. Can I still have A return line clog??? What is the best procedure to check??? :dunno::dunno:
Click to expand...

eagle mark said:
Should be able to blow through the return line. Or if you have a fitting just run a hose into a can and re-check pressure.
Click to expand...

The TBI will run with way too much fuel pressure. Your fuel pressure is too high and you can't adjust it. There has to be something wrong with the return line (what else can make the pressure go up and not adjust). Like Mark said, get another line, put the end in a can and check it.
 
Part 3

Greetings,

This morning, I disconnected the return line only from the pod assy., and attached a hose/can rig. I connected to the relay and looked at the volume coming out... "I thought is that it". (Slow) I then looked at the gauge 15.5 ??. I started to adj. the reg. up/down ...No pressure change ??? Next I disconnected the pressure line from the pod assy. and attached a hose to the pressure in-coming line.. Stronger flow. (Pic below is pressure line)
IMAG0045.jpg

IMAG0047.jpg


I even got my LIPS on the return line and blew..........I would say it was as hard as blowing-up a new balloon, also being able to continue to blow with out getting a blue face, or feeling like an obstruction.

I started to think,
what are the Spec's on the FP-assy.?? (Installed weeks ago. NEW)
IMAG0048.jpg


A few things to verify....Minimum pressure range (PSI) Is 14.5 ,And for a 31 gal tank ??? What' stock for a 88??

Dose anybody see anything wrong with the Spec's ???

Next, I checked the range again on the PR ..No binding.
Here is the pod broken down

IMAG0044.jpg

I checked all passages for obstructions and found nothing.

YES,I KNOW THE TANG IS BROKEN ! I did it with all the adjusting.

Next is the stock spring.
IMAG0043.jpg


Now I'm on a hunt for a(FPR spring & Hood lock down) Don't know correct name:dunno:

Thanks for all help.
:D:waytogo::bow:
 
What spring was in there? I thought it was stock?

With that pump stating min pressure is 14.5 PSI and a stronger spring then stock could be the issue? Your showing 15.5 PSI, that's only 1 PSI off and could be gauge error...

I'm finding on my Bench Fuel Pressure Tester that is using air pressure that at to high a pressure there is no response from the stock spring regulator. Meaning you can have to much pressure for the spring to work.
 
eagle mark said:
What spring was in there? I thought it was stock?

With that pump stating min pressure is 14.5 PSI and a stronger spring then stock could be the issue? Your showing 15.5 PSI, that's only 1 PSI off and could be gauge error...

I'm finding on my Bench Fuel Pressure Tester that is using air pressure that at to high a pressure there is no response from the stock spring regulator. Meaning you can have to much pressure for the spring to work.
Click to expand...

Hi mark,
I've owned this truck for 6 years and NEVER Touched or had a mechanic touch the TB. I am guessing it is stock????

As far as the fuel pump Assy. goes, I checked web site , It states " This part fits your vehicle"

I'm confused, What pressure I'm I looking For???

Where can I get a correct spring and body, that will work with the new fuel pump assy. spec's ??:dunno::dunno:

I also want to get a higher psi gauge.

:eek1:
:waytogo:
 
I have no idea where to buy the spring body? JY I guess? The spring is available at Mr Injector.

I still don't understand how you get 15.5 PSI and nothing less from a stock spring? The gauge has to be wrong? It's off the scale so if it's working who knows how much higher it is?

You sure that tab was on when you were turning the adjustment screw? Without it there would be no change in height of spring and no change in pressure.

I just ordered a 0-30 Marshall gauge so I get more accurate reading on my test setup. The 0-60 swing is to much for the lower TBI pressures. Obviously 0-15 is not enough.

13-14 PSI is fine on a stock motor.
 
Try renting a gauge setup from autozone. Then you will not need to fork out any more cash and be sure.
 
Bewildered ??

So,
The saga continues. I went to the J.Y. and picked-up an extra complete TB, and an extra pod. ( Broken ) The main reason for this is, I needed a spring hold-down cap and to have parts to test. (ALL to find that "ELUSIVE" 12/13 PSI :eek1:

This is what I got.
IMAG0049.jpg
IMAG0052.jpg


Here are the 3 pods together. (2 from JY 1 from truck)
IMAG0051.jpg


I got 1 large spring and 1 small spring.
IMAG0053.jpg
IMAG0054.jpg


Now hers is the "Bewildering" part. I had enough gaskets, ect.. to put together two pods. The testing begins........ I had put 1 pod together with an afpr/small spring and 1 with an afpr/large spring. I started out by only having the pressure side connected to TB and the return line into a bottle.
I also, installed a new 0-30 psi gauge....and tested...15psi..adjusted top/bottom ...No movement, still 15 PSI????
I tried the next set-up ....15 psi....adjusted top/bottom.. No movement..15 psi. I tested both units with pressure/return lines connected....15psi,and adjusted ....15 psi.. Both units never had ( increase or decrease) in pressure ???:dunno::dunno:

I took both pods back apart. The next step was to put the ( non modded fpr cap/ small spring together......connected....tested....10 PSI... steady.:dunno:

Today, I packed /shipped 2 sets of injectors to Mr. Injector for the whole testing thing.

Cont...next page. :waytogo:
 
How long is the adjusting screw for the afpr? I didn't notice one in any of the pics and was wondering if it was too short? Or could it be stripped and not making any adjustments?
 
Last edited:
Bewildered P2

:smokin2:cont...

OK ....Mr. Injector....I figured If I'm doing this, I want to know the Injectors are Good 2 Go ! As I was reading on his page, I saw something I was totally in the dark about....There is a micro filter on the side of each Injector ....WOW!....I never noticed. All the COMPLETE rebuild kits I've got never had them in there. :doah:

Just a side note...I did clean/flush the injector/micro filter the best I could with TB cleaner before all the testing. After the testing, I removed/inspected the micro filters . I put them up to the light and I could see through, I know this test doesn't mean squat.... The best part....Mr. Injector supplies ALL pieces/parts with service to put together the pod.. That's cheaper /easer than trying to deal with the DUMB parts store, and source a kit yourself.

I'm also going to get an extra spring/retainer, (small ??), and a few extra gaskets. I will re-test when I get the injectors back. I just need to know if the adjustment mod works in..... "REALITY ".... sounds good on paper.

:thinking:

FenderChest....OUT! :cool:
 
wheels87k5 said:
How long is the adjusting screw for the afpr? I didn't notice one in any of the pics and was wondering if it was too short? Or could it be stripped and not making any adjustments?
Click to expand...

Hi Wheels87K5,
The screw is 1/4-28 x 3/4" FH hex. The spring cap needs to be tapped, and is "pot" metal. I checked both ...threads look good.:waytogo:
 
Great. Just trying to find the unusual or ooops moments. Keep it up, eventually you'll get it.:waytogo:
 
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