Re: top end miss
[Re: Quicktree]
#537451
11/26/09 08:09 PM
11/26/09 08:09 PM
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Joined: Nov 2009
Posts: 3,410 Belpre,Ohio
CHAPPER
master
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master
Joined: Nov 2009
Posts: 3,410
Belpre,Ohio
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How much total timing? Have had problems with too much at high RPM.
If you like drag racing, support your local track.
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Re: top end miss
[Re: earthmover]
#537454
11/26/09 09:01 PM
11/26/09 09:01 PM
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Joined: Jun 2009
Posts: 877 ky
68roadrunner
super stock
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super stock
Joined: Jun 2009
Posts: 877
ky
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Quote:
the cam works from 2500 to 6500 and its at about 6800 it sounds like a sputter..i looked at the plugs yest. and the fr. plugs dont look as good as the bk.....the # 1 and the # 2 look a little diff. than the rest but the bk 5/7/6/8 looks great...3/4 looks better than 1 and 2.....also my dist. is locked out timing is set at 33 plan to change it when i go back to the track tomm. i hope..
6800 with a 7000 chip, it is probably picking up some cylinders early, or the tach could be off some.
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Re: top end miss
[Re: earthmover]
#537455
11/26/09 09:13 PM
11/26/09 09:13 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
the cam works from 2500 to 6500 and its at about 6800 it sounds like a sputter..i looked at the plugs yest. and the fr. plugs dont look as good as the bk.....the # 1 and the # 2 look a little diff. than the rest but the bk 5/7/6/8 looks great...3/4 looks better than 1 and 2.....also my dist. is locked out timing is set at 33 plan to change it when i go back to the track tomm. i hope..
done told what the problem probably is change the chip
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Re: top end miss
[Re: 68roadrunner]
#537457
11/26/09 09:37 PM
11/26/09 09:37 PM
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Joined: Jan 2007
Posts: 526 NC
barracuda man
mopar
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mopar
Joined: Jan 2007
Posts: 526
NC
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Quote:
Quote:
the cam works from 2500 to 6500 and its at about 6800 it sounds like a sputter..i looked at the plugs yest. and the fr. plugs dont look as good as the bk.....the # 1 and the # 2 look a little diff. than the rest but the bk 5/7/6/8 looks great...3/4 looks better than 1 and 2.....also my dist. is locked out timing is set at 33 plan to change it when i go back to the track tomm. i hope..
6800 with a 7000 chip, it is probably picking up some cylinders early, or the tach could be off some.
Try a 3000 chip in the box.put in park and look at the tack.rev it slowly.mine starts droping cylinders at 2600.
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Re: top end miss
[Re: earthmover]
#537460
11/26/09 11:35 PM
11/26/09 11:35 PM
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Joined: Nov 2009
Posts: 2,177 ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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WELL COULD BE ALOT OF THINGS TO CHECK HERE ??SHIFT POINT, IS IT BELOW OR ABOVE THAT POINT IF IT IS ABOVE AND IT'S NOT CAUSING THE PROBLEM THEN, LOOK AT ELECTRICAL OR MECHANICAL (IE, VALVE SPRING TO WEAK) COULD STILL BE REV LIMITER PUT IN HIGHER LIMIT THAT IS SIMPLE!! 7# FUEL PRESSURE ALWAYS SOUNDS GOOD ?? BUT DOESN;T MEAN YOU HAVE THAT WHEN IT HAVING IT'S PROBLEM #1 LIMITER FIRST #2 FUEL PRESSURE PUT GAUGE WHERE YOU CAN SEE IT (ALSO CHECK SIZE OF FUEL LINES (TO SMALL, BENT?) #3 CHECK VALVE SPRINGS FOR CORRECT TENSION THIS USUALLY A SIMPLE FIX ON MOST SITUATIONS A MSD BOX IF IT FIRING ITS GOOD IT CANNOT PICK AND CHOSE WHEN TO FIRE, IT IS JUST TOLD TO FIRE, YOU CAN PERFORM THAT TEST EASY! IF IT FIRES FROM COIL TO DIST CAP, ITS A GOOD ONE, NEED TO CHECK BEYOUND THAT POINT
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Re: top end miss
[Re: dennismopar73]
#537461
11/27/09 12:14 AM
11/27/09 12:14 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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A MSD BOX IF IT FIRING ITS GOOD IT CANNOT PICK AND CHOSE WHEN TO FIRE, IT IS JUST TOLD TO FIRE, YOU CAN PERFORM THAT TEST EASY! IF IT FIRES FROM COIL TO DIST CAP, ITS A GOOD ONE, NEED TO CHECK BEYOUND THAT POINT
Incorrect... I have had a box cause a high end miss and did all the checks(pulled the limiters, checked ground and hot leads), finally changed my 7AL box with my spare and the miss was gone... put the old one back on and the miss returned(same day) then changed it back to the new one... miss gone. I know of a couple others on here that have had the same issue
By the way.... turn off your caps lock... thanks
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Re: top end miss
[Re: MR_P_BODY]
#537464
11/27/09 07:33 AM
11/27/09 07:33 AM
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Joined: Oct 2005
Posts: 976 ontario canada
mac56
super stock
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super stock
Joined: Oct 2005
Posts: 976
ontario canada
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Quote:
A MSD BOX IF IT FIRING ITS GOOD IT CANNOT PICK AND CHOSE WHEN TO FIRE, IT IS JUST TOLD TO FIRE, YOU CAN PERFORM THAT TEST EASY! IF IT FIRES FROM COIL TO DIST CAP, ITS A GOOD ONE, NEED TO CHECK BEYOUND THAT POINT
Incorrect... I have had a box cause a high end miss and did all the checks(pulled the limiters, checked ground and hot leads), finally changed my 7AL box with my spare and the miss was gone... put the old one back on and the miss returned(same day) then changed it back to the new one... miss gone. I know of a couple others on here that have had the same issue
By the way.... turn off your caps lock... thanks
I'm one of those others. Mike let me try his spare 7al and problem solved. Not saying this is your problem but it does happen.
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Re: top end miss
[Re: mac56]
#537465
11/27/09 09:51 AM
11/27/09 09:51 AM
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Joined: Nov 2009
Posts: 2,177 ill
dennismopar73
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,177
ill
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you had a connection problem box that fires by the test is good!!! Call M S D they tell you that!! it doesnt know when to fire or not, it is told to fire, thats all it does!! now you can have elect interferance causing that same erractic misfire such as having you're dist wire running with alt wire ,, other things electric shifters controls we all like our wires run together looking nice and tight dont we?? thats why i can key down on my c b radio and get free car washes go thru micky ds and open their cash drawers sorry for caps
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Re: top end miss
[Re: dennismopar73]
#537466
11/27/09 09:58 AM
11/27/09 09:58 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
you had a connection problem box that fires by the test is good!!! Call M S D they tell you that!! it doesnt know when to fire or not, it is told to fire, thats all it does!! now you can have elect interferance causing that same erractic misfire such as having you're dist wire running with alt wire ,, other things electric shifters controls we all like our wires run together looking nice and tight dont we?? thats why i can key down on my c b radio and get free car washes go thru micky ds and open their cash drawers sorry for caps
Thats what I thought also, but when you do a A-B-A change and the problem comes and goes it wasnt a connection problem.... yes you are correct that when I sent it back to MSD they checked it out and said nothing was wrong.... BUT when I got the box back and tried it again it worked fine(still had to pay the $35 bucks). I know of others that have sent their boxes back and they said the same but it came back working properly
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