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Topic: fuel pressure spec (Read 6101 times) previous topic - next topic

fuel pressure spec

Reply #30
i see a
eose a1a
0280150900
445
060
ur right up is saying these are the blue top injecters
1996 tbird 4.6 auto--STOCK BOTTOM END WITH OVER 183K MILES
12.82@105.3MPH on the juice
13.82 @98.59 all motor
1991 COUGAR LS 5.0 AUTO
1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 gt40  12.33@110.04
1989 mustang gt 10.68@126.97
1984 tbird 5.0

fuel pressure spec

Reply #31
Came across some interesting verbage in the 84 shop manual.

In the disassembly of the CFI Fuel charging assembly:

"One at a time pull the injectors out of the upper body. Identify each injector as "choke" or "throttle" side".

It refers to a figure with an arrow pointing to the bottom end barrel of the injector and says "injector identification letter"

In the assemble section:

Identify injectors and install them in their appropriate locations (choke or throttle side).

It kind of implies there is some difference between the two. I never thought there was any mechanical difference.

I wonder if the EEC controls them differently, like when cranking for instance.

Maybe you could try reversing the the connectors on them and see if it starts any better.

I read somewhere you can test the injectors by unplugging them one at a time while idling and see if the RPM drops the same amount.

fuel pressure spec

Reply #32
His orintation of the tan / black connectors are correct.

That unplugging an injector shop manual test works better if you have an injector for each cylinder.  you just do the ratio of rpm to qty of injectors.  This means he will have a flipping / flopping motor if he unhooks one.

Here is what i do see / know.  Someone has been all up in that CFI.  That is not a stock FPR unless the freezeplug has been drilled out on top and removed so someone can adjust it.  The shrader valve is not stock either.  That CFI ****I THOUGHT***** was only found on 83 cougs and most all your LTD's of the like back to 82 or 81.

You have a cfi pn on the side, can you put it up?

fuel pressure spec

Reply #33
Is that injector wet?

You can also attemp to flush out any debris on the top side of the injector by removing the shrader valve, ground your eec test conn to chassis, set up to catch gas, turn on your key , let gas flow out. 

There is a square bolt head on the under side per your last pic that can be removed as well to get up in there with a gun brush to clean out those ports as well.


If you can have someone up at the cfi spraying a little gas while you keep her running, and while adding gas by spray bottle and gas pedel she sounds better, then your problem is back to fuel delivery,likely at the injectors.

Those injectors should read about 2ohms there abouts.

fuel pressure spec

Reply #34
the fitting on the shrader valve is for my pressure gauge,as for the injecters being wet i had sprayed them down with carb cleaner to see the color better and they were still wet when i took the pic
i wanna say this thing is flooding out,maybe getting to much fuel
as for when i try to load it up and do a power brake to spin a tire it will bogged down and cut off and wont start unless i put the pedal to the floor
throttle body has --e4ae fb b 4f 13--highlghted with yellow markall paint
mike
1996 tbird 4.6 auto--STOCK BOTTOM END WITH OVER 183K MILES
12.82@105.3MPH on the juice
13.82 @98.59 all motor
1991 COUGAR LS 5.0 AUTO
1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 gt40  12.33@110.04
1989 mustang gt 10.68@126.97
1984 tbird 5.0

fuel pressure spec

Reply #35
ok,, turn down your fuel presure......

your plugs must look wet/like hell.


Now that you think its too much fuel, pull the ACT sendor located on one of the intake runners (I think on the pass side front) and clean it off as well.  Read its resistance per my diy link just to make sure its cold reading is correct.

Set your choke just like you would a carb when the motor is bone cold and the throttle plates barely start to open.

fuel pressure spec

Reply #36
i lowered the pressure to 35psi,choke is good,when cold i pat the gas once and she will start right up.after she gets a lil warm is when the problem starts
that is as far as i got,may look at the o2 sensor and act in the am
mike
1996 tbird 4.6 auto--STOCK BOTTOM END WITH OVER 183K MILES
12.82@105.3MPH on the juice
13.82 @98.59 all motor
1991 COUGAR LS 5.0 AUTO
1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 gt40  12.33@110.04
1989 mustang gt 10.68@126.97
1984 tbird 5.0

fuel pressure spec

Reply #37
all the cfi v8 i have seen  had the plunger/ vacuum thing instead of the throttle position sensor and the v6 had the throttle position sensor.
84 el camino ss-daily driver(efi mild sbc,2004r, posi 3:42 rear.)
84 mercury cougar v6- was a v6/ nitrous drag car, going back to mostly stock
81 chevy malibu-protouring/  drag car.( efi sbc supercharged 283 that will rev to the moon, 2004r, 4:11 posi rear)

fuel pressure spec

Reply #38
Quote from: blackcougar71;254703
all the cfi v8 i have messed with have had the plunger/ vacuum thing especially on 83-86 and the v6 had the throttle position sensor. my car when i got it had the blue injectors instead of the green injectors. but i switched to green till i upgraded the fuel system that  went i to two yellow injectors from a 4.6 crown vic.


How does this help out with the problem other than adding to the problem trying to figure out what it is you said.?

fuel pressure spec

Reply #39
yea,i am still trying to comprehend that one
mike
1996 tbird 4.6 auto--STOCK BOTTOM END WITH OVER 183K MILES
12.82@105.3MPH on the juice
13.82 @98.59 all motor
1991 COUGAR LS 5.0 AUTO
1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 gt40  12.33@110.04
1989 mustang gt 10.68@126.97
1984 tbird 5.0

fuel pressure spec

Reply #40
im out of ideas man.............sorry
a fresh set of eyes would be better cause i have no idea what the problem is.  First time ever on here is say it,,, "i give up"

fuel pressure spec

Reply #41
thats cool,imma take all the relpys and read threw to try and get some diff ideas on what it may be
i did find out that the ignition switch itself is about broke in half,it has about fallen apart
mike
1996 tbird 4.6 auto--STOCK BOTTOM END WITH OVER 183K MILES
12.82@105.3MPH on the juice
13.82 @98.59 all motor
1991 COUGAR LS 5.0 AUTO
1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 gt40  12.33@110.04
1989 mustang gt 10.68@126.97
1984 tbird 5.0

fuel pressure spec

Reply #42
little update
i found that the wries going to the ignition mod connecter are bare with no sheilding,i ordered a new one,should have it in a couple days
mike
1996 tbird 4.6 auto--STOCK BOTTOM END WITH OVER 183K MILES
12.82@105.3MPH on the juice
13.82 @98.59 all motor
1991 COUGAR LS 5.0 AUTO
1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 gt40  12.33@110.04
1989 mustang gt 10.68@126.97
1984 tbird 5.0

 

fuel pressure spec

Reply #43
FiNAL UPDATE
i put a new ignition module on and the ole girl came to life
wow it is amazeing what a old non ho 302 with single 2in exhaust will do
now to get her inspected and start moding her out
mike
1996 tbird 4.6 auto--STOCK BOTTOM END WITH OVER 183K MILES
12.82@105.3MPH on the juice
13.82 @98.59 all motor
1991 COUGAR LS 5.0 AUTO
1990 ford f150 5.0
1989 cougar xr-7 5spd 5.0 gt40  12.33@110.04
1989 mustang gt 10.68@126.97
1984 tbird 5.0