Previous Thread
Next Thread
Print Thread
Page 1 of 2 1 2
440 running rough.....need some help #1342367
11/27/12 10:17 PM
11/27/12 10:17 PM
Joined: Nov 2012
Posts: 26
S
scarface06 Offline OP
member
scarface06  Offline OP
member
S

Joined: Nov 2012
Posts: 26
Hey fella's glad to be here. Had a buddy from a knife forum tell me about you guys so I'll be looking for all kinds of info.
I have a'68 Plymouth Satellite that I bought in 1994. Fixed it all up, won trophies at the car shows and had it running 13.02 @ 107 in the 1/4 mile. Then in 2005 I sold it like an idiot. Got to really missing the car, tracked it down and was able to buy it back a few months ago.
Had to tune it up and clean on it to get it running half way right, the other owner did a piss poor job of maintaining it. Got it running good enough that I was getting ready to go to the Mopar event at the drag strip......then it just starts running bad. I've been messing with it for about 3 weeks and can't figure it out.
Its a 440 that I built about 15 years ago. Keep in mind that it ran awesome, then just started running real bad. Here is a list of things I've checked...

Compression.....145-165#
Resealed intake and no leaks
750 Edelbrock carb cleaned
Stamped rocker arms
Mallory Unilte distributor changed to factory electronic ignition, no difference.
Oil pump drive and bushing, good
Changed coil, no difference
Getting good constant spark on all wires.
Checked TDC with piston stop to make sure dampner is right, that's good

The timing mark on the dampner bounces around and does not stay constant. Does this when checked on all wires ( I have timing tape). Has a bad dead spot in it when I give it the gas and when in idle it shakes real bad...sure could use some ideas. Thanks

Re: 440 running rough.....need some help [Re: scarface06] #1342368
11/27/12 10:33 PM
11/27/12 10:33 PM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
R
RapidRobert Offline
Circle Track
RapidRobert  Offline
Circle Track
R

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
Quote:

then it just starts running bad. The timing mark on the dampner bounces around and does not stay constant. Has a bad dead spot in it when I give it the gas and when in idle it shakes real bad.


vac leak/plugs/plug wires


live every 24 hour block of time like it's your last day on earth
Re: 440 running rough.....need some help [Re: scarface06] #1342369
11/27/12 11:02 PM
11/27/12 11:02 PM
Joined: May 2003
Posts: 15,487
Florida
S
scratchnfotraction Offline
I Live Here
scratchnfotraction  Offline
I Live Here
S

Joined: May 2003
Posts: 15,487
Florida

The timing mark on the dampner bounces around and does not stay constant.




this is most likly a stretched t-chain if it has been a while since built. 15 yrs is a long time on a chain if it has been run hard and put up wet.

check to make sure the bushing in the dist is good. I had one run like crap from the wobble shaft causing a mis-fire.

you said you checked the damper by a piston stop,but did you look at the rotor to see if it might have jumped a tooth?

are you sure you did not bend a PR or punch thru a rocker?

get some bad gas maybe? water in tank?

did you check plugs to make sure nothing hit and bent the gap closed?


Last edited by scratchnfotraction; 11/27/12 11:08 PM.
Re: 440 running rough.....need some help [Re: scratchnfotraction] #1342370
11/28/12 12:08 AM
11/28/12 12:08 AM
Joined: Nov 2012
Posts: 26
S
scarface06 Offline OP
member
scarface06  Offline OP
member
S

Joined: Nov 2012
Posts: 26
Plug and wires are good and no vacuum leaks. I did check the gear drive and bushing, both are fine. Have ran several gallons of gas in tank from different stations and dropped and cleaned tank within the first week of getting it back. Full pressure is 6#. Push rods and rocker arms are fine. Don't know if rotor had jumped or not. When at TDC the slot in the gear drive is running straight front to back and the rotor is pointing towards the passenger valve cover.

Re: 440 running rough.....need some help [Re: scarface06] #1342371
11/28/12 12:22 AM
11/28/12 12:22 AM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
R
RapidRobert Offline
Circle Track
RapidRobert  Offline
Circle Track
R

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
the compression readings tell me the long block is healthy, the dist has been swapped, all that is left is the intake/carb (vac leak) & plugs/wires & if the plugs/wires are good & if sure of no vac leaks then that only leaves the carb & if this is this the infamous eddy 1407 . I would pull the top off & see what you see & maybe take it apart & spray it with a cleaner then blow it clean with shop air. Holler how things turn out. EDIT does it have the same ECU when you switched ignitions? What color is it?

Last edited by RapidRobert; 11/28/12 12:28 AM.

live every 24 hour block of time like it's your last day on earth
Re: 440 running rough.....need some help [Re: scarface06] #1342372
11/28/12 12:44 AM
11/28/12 12:44 AM
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem Offline
master
Dodgem  Offline
master

Joined: Mar 2008
Posts: 5,746
Ontario, Canada
The top bushing in the distributor is good no play??

Firing order is right?

Distributor cap new and check for dizzy shaft moving up and down.

may need a dizzy collar to stop pump drive gear from jumping up and down



have another carb to try look at the step up springs with it running to see if they are bouncing up and down.

vacuum advance is on ported vacuum better yet disconnected till it's sorted out.

you sure no vacuum leaks underneath intake.

just some places to look if the timing chain is tight!

Re: 440 running rough.....need some help [Re: Dodgem] #1342373
11/28/12 01:12 AM
11/28/12 01:12 AM
Joined: Nov 2012
Posts: 26
S
scarface06 Offline OP
member
scarface06  Offline OP
member
S

Joined: Nov 2012
Posts: 26
Carb is the 1407 or 1406. It is super clean, cleaned it twice. Very confident that there is no vacuum leaks. The ECU box is just one from the local parts store. Know its not a good one but should be okay for diagnosing. Will check bushing and shaft once again tomorrow.

One thing I need to mention.....Before the issue happened I was testing and tuning it. Had a little knock on the high end from either to much mechanical advance or low octane. Took it out several times and ran it up to 3500 rpm then back down. Ran awesome, would get sideways real quick. Last time I took it out is when I kinda noticed something was wrong. I was only adjusting the full advance of the Unilite. After problem showed up I put it right back and it was the same.

Re: 440 running rough.....need some help [Re: scarface06] #1342374
11/28/12 11:15 AM
11/28/12 11:15 AM
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
R
RapidRobert Offline
Circle Track
RapidRobert  Offline
Circle Track
R

Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
Quote:

Last time I took it out is when I kinda noticed something was wrong. I was only adjusting the full advance of the Unilite.


reluctor gap still good?


live every 24 hour block of time like it's your last day on earth
Re: 440 running rough.....need some help [Re: RapidRobert] #1342375
11/28/12 11:30 AM
11/28/12 11:30 AM
Joined: Nov 2012
Posts: 26
S
scarface06 Offline OP
member
scarface06  Offline OP
member
S

Joined: Nov 2012
Posts: 26



reluctor gap still good?


Still good. It has ran the same with the Unilite and the factory set up.

Re: 440 running rough.....need some help [Re: scarface06] #1342376
11/28/12 11:52 AM
11/28/12 11:52 AM
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines Offline
master
CompWedgeEngines  Offline
master

Joined: Nov 2004
Posts: 3,544
Syracuse,NY
Have you confirmed that the damper ring hasnt slipped and the timing isnt where you actually think it is? Confirm the zero mark on the damper with TDC on cylinder #1?

This sounds more like a timing/ignition/firing issue.

Good battery voltage?


RIP Monte Smith

Your work is a reflection of yourself, autograph it with quality.

WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
Re: 440 running rough.....need some help [Re: scarface06] #1342377
11/28/12 11:57 AM
11/28/12 11:57 AM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
have you checked the voltage at the ballast? (coil side) You'd be amazed what anything below 9v at the coil will do. After that I'd go back to the basics. Go to TDc, unhook the vac advance, turn the carb mixture screws all the way in and back out 1.25 turns, start it take the idle up to 2200 and set the timing at 36*. Back it down to 800rpm adjust for best vacuum reading. take it for a spin. If it's still acting up, drop that carb in the can and get a decent one.


[IMG]http://i66.tinypic.com/pui5j.jpg[/IMG]
Coming soon!!!!
Re: 440 running rough.....need some help [Re: Mr.Yuck] #1342378
11/28/12 12:11 PM
11/28/12 12:11 PM
Joined: Nov 2012
Posts: 26
S
scarface06 Offline OP
member
scarface06  Offline OP
member
S

Joined: Nov 2012
Posts: 26
Didn't check the ballist yet, but did run 12 volt direct to coil to try it but no difference. It's not like it sat for a couple months and now not running good. It was running great one day, then the very next day it went to hell. Also I did check the dampner.. within about 2 degrees.

Last edited by scarface06; 11/28/12 12:20 PM.
Re: 440 running rough.....need some help [Re: scarface06] #1342379
11/28/12 12:45 PM
11/28/12 12:45 PM
Joined: Aug 2011
Posts: 2,842
Pattison Texas
CSK Offline
master
CSK  Offline
master

Joined: Aug 2011
Posts: 2,842
Pattison Texas
try spraying carb cleaner while its running & see if it smooths out,if it does,then vac leak or the carb,i am betting on a carb problem


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: 440 running rough.....need some help [Re: CSK] #1342380
11/28/12 12:54 PM
11/28/12 12:54 PM
Joined: Nov 2012
Posts: 26
S
scarface06 Offline OP
member
scarface06  Offline OP
member
S

Joined: Nov 2012
Posts: 26
Quote:

try spraying carb cleaner while its running & see if it smooths out,if it does,then vac leak or the carb,i am betting on a carb problem


Tried that the other day and it wanted to die. Did not help, only made it worse.

Re: 440 running rough.....need some help [Re: scarface06] #1342381
11/28/12 01:24 PM
11/28/12 01:24 PM
Joined: Aug 2003
Posts: 847
Avondale AZ
Prodart440 Offline
super stock
Prodart440  Offline
super stock

Joined: Aug 2003
Posts: 847
Avondale AZ
Dirty fuel filter??


Aaron

68 Roadrunner 383/AT
69 Dart GT Conv. 383/AT
05 Dodge Ram 4x4 Cummins
06 GoManGo R/T Daytona #757
68 Coronet 440
Re: 440 running rough.....need some help [Re: Prodart440] #1342382
11/28/12 01:38 PM
11/28/12 01:38 PM
Joined: Aug 2011
Posts: 2,842
Pattison Texas
CSK Offline
master
CSK  Offline
master

Joined: Aug 2011
Posts: 2,842
Pattison Texas
is it just at idle ? or all rpms


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: 440 running rough.....need some help [Re: Prodart440] #1342383
11/28/12 02:21 PM
11/28/12 02:21 PM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Quote:

Dirty fuel filter??




that will do it...or dirty fuel sock

Re: 440 running rough.....need some help [Re: Prodart440] #1342384
11/28/12 03:21 PM
11/28/12 03:21 PM
Joined: Nov 2012
Posts: 26
S
scarface06 Offline OP
member
scarface06  Offline OP
member
S

Joined: Nov 2012
Posts: 26
Quote:

Dirty fuel filter??


new clear filter, complete line has blown out when tank was dropped. I know it does it at idle to 3000RPMs while sitting in the garage. Will drive it on the highway today. Sure does suck to get it back after 7 years just to have it sitting

Re: 440 running rough.....need some help [Re: scarface06] #1342385
11/28/12 03:30 PM
11/28/12 03:30 PM
Joined: Aug 2011
Posts: 2,842
Pattison Texas
CSK Offline
master
CSK  Offline
master

Joined: Aug 2011
Posts: 2,842
Pattison Texas
while its running look down the carb & see if you can see fuel dripping


1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5

Re: 440 running rough.....need some help [Re: CSK] #1342386
11/28/12 03:48 PM
11/28/12 03:48 PM
Joined: Nov 2012
Posts: 26
S
scarface06 Offline OP
member
scarface06  Offline OP
member
S

Joined: Nov 2012
Posts: 26
Quote:

while its running look down the carb & see if you can see fuel dripping


I'm guessing you want me to check to make sure there is fuel coming only from where is is supposed to? I'll check that later today as well.

Page 1 of 2 1 2






Powered by UBB.threads™ PHP Forum Software 7.7.1