4.3l marine intake tuning
Jan 11, 2009 | 09:27 PM
#11
TECH Fanatic
Joined: Oct 2005
Posts: 1,379
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From: Woodstock Ontario Canada
which scan tool? the orange ones like auto zone has or the tech II? i tore the old manifold apart to see which injector went where. but i could be wrong I'll see if i can find a write up with wiring to make sure its right. i tried to use hp tuners balance injector thing but its only good for v8's it seems. i can get a fuel pressure gauge from a buddy.
right now after idling for a few minutes you can touch the manifold right where it comes off the head. some ports are hot as hell a couple are just warm to the touch.
here is a question. if i pull the plugs on the cold ports, what would they look like if no fuel but good spark good fuel no spark?
right now after idling for a few minutes you can touch the manifold right where it comes off the head. some ports are hot as hell a couple are just warm to the touch.
here is a question. if i pull the plugs on the cold ports, what would they look like if no fuel but good spark good fuel no spark?
Snap-On, tech 2, Modis and others.
Sounds like you have some dead cylinders.
If you move the injectors around, does the cold manifold follow the injectors?
this will easily be diagnosed by doing a Cylinder Injector Balance test. I used a Snap On scan tool. Any mechaical garage shoudl have 1 that will work.
peace
Hog
Jan 11, 2009 | 09:40 PM
#13
TECH Fanatic
Joined: Oct 2005
Posts: 1,379
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From: Woodstock Ontario Canada
Here is some good info about the marine and truck 4.3. Cool power and torque differences. it illustrates just how a good exhaust makes all teh difference.
http://www.bucksengines.com/Data/24.pdf
peace
Hog
http://www.bucksengines.com/Data/24.pdf
peace
Hog
Jan 11, 2009 | 10:03 PM
#14
13 Second Truck Club
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From: Arlington (DFW), Texas
Here is some good info about the marine and truck 4.3. Cool power and torque differences. it illustrates just how a good exhaust makes all teh difference.
http://www.bucksengines.com/Data/24.pdf
peace
Hog
http://www.bucksengines.com/Data/24.pdf
peace
Hog
Jan 11, 2009 | 10:55 PM
#17
post up some pics of the new intake, i want to see it... So when is it going on? You talked to Justin about a tune update?
Jan 11, 2009 | 10:59 PM
#18
13 Second Truck Club
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From: Arlington (DFW), Texas
I have a great side by side pic Ill post in just a second. Justin said he'll squeeze me in when he is in town in Feb. I was hoping we could get one log before he is here, that way he can do some finalizing on the tune while he is here, instead of just starting it.
Jan 11, 2009 | 11:07 PM
#20
, just let me know ahead of time...
