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December 18, 2018, 07:37:35 AM

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Author Topic: Aftermarket Fuel Injection  (Read 4054 times)
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R3
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« Reply #45 on: August 01, 2018, 07:05:53 AM »

Checking in to see if you found anything last nigh. Courious to learn what is causing you the grief in the FiTec system.

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RRR
17 JKURR
4.5 Metal cloak
37 BFG ATs
Dynatrac, PSC, Barnes, Ried, RCV....
next?

"Keep calm and carry on, No Thanks! I would rather raise hell and change the world."
MusketStyle
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« Reply #46 on: August 01, 2018, 07:32:25 AM »

Not yet, we have been having monsoon weather, will update as soon as possible

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2002 WJ I6 selectrak, transmission shift kit

1985 CJ7 I6 258 4.2L
Dana 300
T-5 transmission
32x11.50x15
R3
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« Reply #47 on: August 03, 2018, 07:03:07 AM »

 Just touchin base,  have the flood water subsided enough to see the motor yet?


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RRR
17 JKURR
4.5 Metal cloak
37 BFG ATs
Dynatrac, PSC, Barnes, Ried, RCV....
next?

"Keep calm and carry on, No Thanks! I would rather raise hell and change the world."
MusketStyle
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« Reply #48 on: August 03, 2018, 07:25:09 AM »

Lol, no, seriously. I will try and get something on here this weekend.  I have a trip on the 24th to potts mountain i would like to get it ready for

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2002 WJ I6 selectrak, transmission shift kit

1985 CJ7 I6 258 4.2L
Dana 300
T-5 transmission
32x11.50x15
MusketStyle
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Ramming it through... MusketStyle
« Reply #49 on: August 03, 2018, 07:25:53 AM »

Want to go? I will let you tune my fitech! Lol

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2002 WJ I6 selectrak, transmission shift kit

1985 CJ7 I6 258 4.2L
Dana 300
T-5 transmission
32x11.50x15
R3
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Member 2018 VA4WD/BRC
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Posts: 559
« Reply #50 on: August 03, 2018, 05:30:04 PM »

Loved to hit Potts again, but the last trip left me with some expen$ive body damage and I have a motorcycle trip that weekend.  Be happy to head back another time.

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Cheers
RRR
17 JKURR
4.5 Metal cloak
37 BFG ATs
Dynatrac, PSC, Barnes, Ried, RCV....
next?

"Keep calm and carry on, No Thanks! I would rather raise hell and change the world."
MusketStyle
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Ramming it through... MusketStyle
« Reply #51 on: August 04, 2018, 08:12:26 PM »

I understand, ol' CJ aint a looker so not a lot of concerns about body damage Very Happy

So i did quite a bit of tinkering today.  Retarded the timing a lot, tweaked the IAC values at idle and upped the accelerator shot quite a bit for WOT and normal acceleration. The accelerator pump made a dramatic difference, and when i gave some of the timing back that sob came to life!

Im still getting a pop when shifting up to the next gear but everything else hugely better. I am really shocked at how much it came to life. Did several unintentional squawks pulling out on to the main drag for some hard pulls.

The shofting pops MAY be a separate issue i read about that i will need to dig into.

I am much happier now, have some tweaks still left but it is much much better.

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2002 WJ I6 selectrak, transmission shift kit

1985 CJ7 I6 258 4.2L
Dana 300
T-5 transmission
32x11.50x15
R3
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Member 2018 VA4WD/BRC
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Posts: 559
« Reply #52 on: August 06, 2018, 07:45:18 AM »

Congrats! little bugger is runnig again.
So the 'POP" you are refering to is in the tail pipe or the throttle body?

 If the pop is thru the trottle body check the  intake gaskets for an air leaks.

If you are running headers  gaskets are suspect if you have some tail pipe popping. Tail pipe popping is also a sign of a lean condition. System might still be adjusting.

Tuning it is a bit of a game, have to balance all the parts and  the mechanical advance in the dissy might need stronger springs if everything else is good.

On my 56  I have a davis Unified Dissy, it came with three sets of springs and I had to change them to get the right curve.  Seriously thinking of locking them down and using the EFI to control the advance. woudl be musch faster and more accuarate for the throttle input.

Cheers

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Cheers
RRR
17 JKURR
4.5 Metal cloak
37 BFG ATs
Dynatrac, PSC, Barnes, Ried, RCV....
next?

"Keep calm and carry on, No Thanks! I would rather raise hell and change the world."
MusketStyle
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Ramming it through... MusketStyle
« Reply #53 on: August 06, 2018, 08:02:25 AM »

Thanks dude. definitely a pop through the throttle body i do have a header leak. I freaking hate headers... i never seem to be able get them to seal... tempted to use high temp silicone at this point... i have used expensive gaskets and even doubled them up. I really don't think it has an intake gasket leak.... not been able to find one. I did install one some time ago.

I was strughling with whether or not to get the computer controller timing setup passed because it was going to cost an aditional $600+

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2002 WJ I6 selectrak, transmission shift kit

1985 CJ7 I6 258 4.2L
Dana 300
T-5 transmission
32x11.50x15
R3
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Member 2018 VA4WD/BRC
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Posts: 559
« Reply #54 on: August 06, 2018, 08:13:10 AM »

Pop in the TB,
Humm,  springs on the mechanical advance would be my guess.  Might need to be a bit stronger to slow the advance.

or

Back out the base timing  a degree or two.

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Cheers
RRR
17 JKURR
4.5 Metal cloak
37 BFG ATs
Dynatrac, PSC, Barnes, Ried, RCV....
next?

"Keep calm and carry on, No Thanks! I would rather raise hell and change the world."
R3
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Member 2018 VA4WD/BRC
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Posts: 559
« Reply #55 on: August 06, 2018, 08:16:57 AM »

 call A-1 Speed and custom in Fredricksburg, they can fix you up with a great set of Header gaskets that will not leak.


425 Chatham Heights Rd
 Fredericksburg, Virginia 22405

(540) 371-9926

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Cheers
RRR
17 JKURR
4.5 Metal cloak
37 BFG ATs
Dynatrac, PSC, Barnes, Ried, RCV....
next?

"Keep calm and carry on, No Thanks! I would rather raise hell and change the world."
MusketStyle
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Posts: 254
Ramming it through... MusketStyle
« Reply #56 on: August 09, 2018, 07:28:40 PM »

New update, i dont drive this thing much and part of that is because the brakes suck and so I went to change the master cylinder and when I turn the vehicle on to test the brakes it wouldn't turn off.

This was a problem I've had since I installed the Fitech system and I replaced the alternator a while back to try and solve the issue.

Having done that I thought I solved the problem because it would turn on and off.

 however at Oakridge I discovered that the vehicle would not turn off with the headlights on so easy fix turn the headlights off. However I have done some tests, I took the alternator to AutoZone it passed all of their tests.

I tested it with a multi meter It is backfeeding about 5 volts give or take which seems to be just enough to keep the vehicle running.

If I take the alternator out of the electrical system and just run on the battery the vehicle turns on and off no problem.

Lastly, the voltage meter is bouncing all over the place too.

 Perhaps I should start a new post but if anybody has any ideas I would love to see what they are thanks

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2002 WJ I6 selectrak, transmission shift kit

1985 CJ7 I6 258 4.2L
Dana 300
T-5 transmission
32x11.50x15
MusketStyle
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Posts: 254
Ramming it through... MusketStyle
« Reply #57 on: August 09, 2018, 07:35:54 PM »

Heres the results of the test

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2002 WJ I6 selectrak, transmission shift kit

1985 CJ7 I6 258 4.2L
Dana 300
T-5 transmission
32x11.50x15
RattleTrap55
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Member 2018
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Posts: 372
84 CJ7
« Reply #58 on: August 10, 2018, 10:59:11 AM »

OK here goes -

I have the HESCO/MOPAR Performance MPI using a state-of-Art 1994 PCU so this may or may not apply your situation. The older system requires the installation of a diode into the alternator circuit to prevent "Run On"

From Installation instructions
"Install the 7.5 amp diode (supplied) in the field wire of the alternator. This is the smaller of the two wires, usually brown in color, which plugs into the alternator. Cut the wire and
install the diode with the pink crimp-on connector facing toward the alternator. It is imperative that this diode be in the field circuit to protect the new electronics and prevent
a run on condition when the ignition is turned off.


The diode can be purchased from HESCO or if there is a electronics shop near, you can put own together.

http://www.hesco.us/products/7541/electrical-and-electronic/43072/alternator-diode-9400044#.W221JuhKjmE

FWIW
Garner

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3.5 Lift on 33's
4.2L w/HESCO MFI & Howard Cam
T-5 & Dana 300
Spartan Locker

2018 JKU - box stock
MusketStyle
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Ramming it through... MusketStyle
« Reply #59 on: August 11, 2018, 08:09:09 PM »

I ordered a 6v 50a diode. Was hoping to find a solution without it.

Thanks for the help!

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2002 WJ I6 selectrak, transmission shift kit

1985 CJ7 I6 258 4.2L
Dana 300
T-5 transmission
32x11.50x15
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