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hemi cuts out
#440186
08/16/09 07:56 PM
08/16/09 07:56 PM
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Joined: Mar 2004
Posts: 878
hudson valley n.y.
GEORGE68HEMIRR
OP
super street
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OP
super street
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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did some 1/8 mile today...first run she ran great but second and last run engine was cutting out during the run and picked back up at the end .....i have the msd 6 al,pro billet distrib,hvc11 blaster coil...earlier this year i replaced cap and rotor and noticed like rust and crap around the module....scraped and cleaned that....msd 6al is around 11 years old...distrib is around 6 years old....coil around 3 years old.....do you think its electrical??does the box when it goes bad does it go out and on or just die completely.....it was real hot today....over 100...the 6al was real hot to touch....yes its under the hood on front of the inner fender...the car is a 68 roadrunner...572 hemi
Last edited by GEORGE68HEMIRR; 08/16/09 08:20 PM.
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Re: engine cuts out
[Re: GEORGE68HEMIRR]
#440189
08/16/09 08:49 PM
08/16/09 08:49 PM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
master
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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Did you pull a plug and look for a misfire? Those Old MSD 6AL are tough as a piece of flat iron. When the go they go, personally never had one go bad.
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: hemi cuts out
[Re: MR_P_BODY]
#440192
08/16/09 09:03 PM
08/16/09 09:03 PM
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Joined: Mar 2004
Posts: 878
hudson valley n.y.
GEORGE68HEMIRR
OP
super street
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OP
super street
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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so far....i just got it off the trailer.....i can sit there and holder her at say 5grand and it dont cut out....i did watch the fuel pressure gauge run up to 9psi while holding the revs...its set for 6psi.....i know...should be 7.5psi....i am just looking for the possiblities
that mallory 250 electric fuel pump is 10 years old too
Last edited by GEORGE68HEMIRR; 08/16/09 09:07 PM.
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Re: hemi cuts out
[Re: GEORGE68HEMIRR]
#440193
08/16/09 09:12 PM
08/16/09 09:12 PM
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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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When you say... cutting out... do you mean missing pull your plugs and take a look, sounds like you dont tune it up too often 
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Re: hemi cuts out
[Re: GEORGE68HEMIRR]
#440196
08/16/09 09:31 PM
08/16/09 09:31 PM
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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:
brand new plugs ,new wires,cap,rotor,fuel filter....how about that rusted msd module that i cleaned up...it dont cut out reving and holding....when i said cutting out....like dead on her face dead ...then it would take off ... the track 116 degrees with my heat gun
i am going take it out for a ride in the morning and see what happens
Well you pretty well got the igition covered except
for the box.... for right now lets say its fine...
look to the fuel system... I got my car so lean
it tried to do the same thing.... is this right off
the line that this occurs
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Re: hemi cuts out
[Re: MR_P_BODY]
#440197
08/16/09 09:39 PM
08/16/09 09:39 PM
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Joined: Mar 2004
Posts: 878
hudson valley n.y.
GEORGE68HEMIRR
OP
super street
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OP
super street
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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Quote:
Quote:
brand new plugs ,new wires,cap,rotor,fuel filter....how about that rusted msd module that i cleaned up...it dont cut out reving and holding....when i said cutting out....like dead on her face dead ...then it would take off ... the track 116 degrees with my heat gun
i am going take it out for a ride in the morning and see what happens
Well you pretty well got the igition covered except
for the box.... for right now lets say its fine...
look to the fuel system... I got my car so lean
it tried to do the same thing.... is this right off
the line that this occurs
i am just nailing second when it falls on its face then comes back to life and does fine after that....its not breaking up just dead then on
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Re: hemi cuts out
[Re: Hemiroid]
#440198
08/16/09 09:44 PM
08/16/09 09:44 PM
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Joined: Mar 2004
Posts: 878
hudson valley n.y.
GEORGE68HEMIRR
OP
super street
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OP
super street
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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Quote:
What fuel system is on it? If it's a mechanical pump it's probably vapor locking or boiling the fuel in the fuel line.
its a mallory 250 electic pump and mallory fuel filter....8an stainless braded to front....bg regulator to 6an braded to carbs
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Re: hemi cuts out
[Re: GEORGE68HEMIRR]
#440199
08/16/09 09:48 PM
08/16/09 09:48 PM
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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:
Quote:
What fuel system is on it? If it's a mechanical pump it's probably vapor locking or boiling the fuel in the fuel line.
its a mallory 250 electic pump and mallory fuel filter....8an stainless braded to front....bg regulator to 6an braded to carbs
Time to try and reproduce the problem.... get the car
hot(up to the temp you run) and do a flow test on
the fuel system... sounds like its starving
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Re: hemi cuts out
[Re: GEORGE68HEMIRR]
#440203
08/17/09 04:34 PM
08/17/09 04:34 PM
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Joined: Mar 2004
Posts: 878
hudson valley n.y.
GEORGE68HEMIRR
OP
super street
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OP
super street
Joined: Mar 2004
Posts: 878
hudson valley n.y.
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Quote:
i am looking at 70dusterjohns post and was thinking the same thing and read on someones elses responce about the fuel cell foam breaking up...the launce and the foam blocking it up.....this is a old triangler 20 gallon cell which is say 10 years old...could be??
is it possible for the fuel cell foam to block off the pick-up during a launch.....i have to get a new filter and launch it and watch the fuel pressure gauge which i didnt get a chance to do
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