Author Topic: FiTech install, now engine is knocking, it never ends......  (Read 1069 times)

Online cudabob496

  • Sr. Resident
  • ******
  • Posts: 6895
Re: FiTech install, now engine is knocking, it never ends......
« Reply #15 on: June 14, 2017 - 01:21:53 am »
Those who said torque converter bolts were right, they had come loose and where letting the TC slap around on the flex plate.
Seems weird that all 4 would come loose.

came loose because not torqued properly?  May need new bolts?
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"




Offline TelisSE440

  • Sr. Member
  • ****
  • Posts: 1743
Re: FiTech install, now engine is knocking, it never ends......
« Reply #16 on: June 14, 2017 - 04:23:55 am »
Glad you found out early.  :thumbsup:

Online cudabob496

  • Sr. Resident
  • ******
  • Posts: 6895
Re: FiTech install, now engine is knocking, it never ends......
« Reply #17 on: June 14, 2017 - 03:33:42 pm »
but how does FI loosen torque converter bolts???
that is the question!
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"


Offline 73_Cuda_4_Me

  • Jr. Member
  • **
  • Posts: 412
Re: FiTech install, now engine is knocking, it never ends......
« Reply #18 on: June 14, 2017 - 05:33:27 pm »
 :clueless:

Must be too much pre-load on the muffler bearings after FI installation, or worst case scenario - a loose framowitz knudsen valve popping off!!!

 :roflsmiley:
1973 Plymouth Cuda BS23H3B567783

R11 V6X EN2
M21 M25 M31 M88 N41 N42
V1X U B41 C56 G37 J54
JY9 A6X9 0 703 501616
E55 D34 BS23 H3B 567783

Online cudabob496

  • Sr. Resident
  • ******
  • Posts: 6895
Re: FiTech install, now engine is knocking, it never ends......
« Reply #19 on: June 14, 2017 - 06:18:04 pm »
that's what I was thinking
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline 734406pk

  • Andy
  • Sr. Member
  • ****
  • Posts: 1683
Re: FiTech install, now engine is knocking, it never ends......
« Reply #20 on: June 14, 2017 - 09:20:07 pm »
but how does FI loosen torque converter bolts???
that is the question!

Just a guess here but i think the converter bolts were loose to begin with. The FiTech didn't "self tune" yet so the idle was a little rough making the converter rattle at idle. Again, just a guessing.  :clueless:
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
1995 Kawasaki ZX1100E & still alive

Offline Katfish

  • Resident
  • *****
  • Posts: 3732
  • 70 Challenger
Re: FiTech install, now engine is knocking, it never ends......
« Reply #21 on: June 14, 2017 - 10:07:02 pm »
I'm guessing it was just a bad coincidence, car's been down for at least 2 months while I worked on and off on the fuel injection conversion.
I finally get it to the point of being able to try it out, and that was what I heard.  No issues before I started the FiTech install.

Online cudabob496

  • Sr. Resident
  • ******
  • Posts: 6895
Re: FiTech install, now engine is knocking, it never ends......
« Reply #22 on: June 15, 2017 - 12:17:35 am »
I'm guessing it was just a bad coincidence, car's been down for at least 2 months while I worked on and off on the fuel injection conversion.
I finally get it to the point of being able to try it out, and that was what I heard.  No issues before I started the FiTech install.

aren't those bolts supposed to be replaced on occassion?
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

Offline 734406pk

  • Andy
  • Sr. Member
  • ****
  • Posts: 1683
Re: FiTech install, now engine is knocking, it never ends......
« Reply #23 on: June 15, 2017 - 09:02:30 pm »
aren't those bolts supposed to be replaced on occassion?

You can replace them with ARP bolts or use Loctite. Loose converter bolts are a common problem on all makes.
1973 Challenger 440 6 pack auto 3.91 rear
2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
1970 Challenger TA 340 4bbl auto-Sold and sad
1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
1995 Kawasaki ZX1100E & still alive

Offline 69bcuda

  • Jr. Member
  • **
  • Posts: 80
Re: FiTech install, now engine is knocking, it never ends......
« Reply #24 on: June 16, 2017 - 11:57:38 am »
IMO, Loose TC bolts can also damage the threads of the bosses and degrade retention. New bolts, clean threads of all oil, Loctite and torque. Wait for the Loctite to setup after your install. 

Online cudabob496

  • Sr. Resident
  • ******
  • Posts: 6895
Re: FiTech install, now engine is knocking, it never ends......
« Reply #25 on: June 18, 2017 - 01:24:10 am »
IMO, Loose TC bolts can also damage the threads of the bosses and degrade retention. New bolts, clean threads of all oil, Loctite and torque. Wait for the Loctite to setup after your install.
:iagree:

Also, I had leaking valve covers.  Finally noticed the threads on the valve cover bolts were about gone!
If a bolt comes lose, most likely the installer messed up somehow.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.
Up to 4000 RPM, Warp Speed, Up to 5000, Rediculous Speed, Up to 6000 RPM, Ludicrous Speed!

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"