Can I convert tbi to carb 87 z24i - Nissan Forum
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#1 Old Aug 18th, 2010, 09:31 PM
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Can I convert tbi to carb 87 z24i

does anyone know if i can convert my 87 z24i to a carburetor?
(i'm tired of trying to figure out the sputter)
If you can convert it where would you find the right carb?
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#2 Old Aug 19th, 2010, 04:45 PM
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you could got to an 85 720 that truck has the same engine and has a carb..

you would probably have to go with the dizzy as well as it is vacumn operated advance...
#3 Old Aug 19th, 2010, 08:16 PM
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Thanks Zane
will the carb bolt right in place of the tbi or will i need some kind of adapter?
and where do u think i can get a carb fairly reasonable?
#4 Old Aug 19th, 2010, 08:32 PM
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no , you need the manifold as well and agaun you would have to bring the dizzy with it.

also the carb has an electric choke ..
it can be handled pretty easily but there are also on ot 2 actuator that have to be wired in..

i have the parts but i do not think you havre the expertise to make it work...


why don't you tell me the symptoms you are having and what the codes are from the ecm???
#5 Old Aug 19th, 2010, 08:46 PM
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mine is the one i had a long discussion about a while back that i kinda gave up on,
it's an 87 hb tbi that cuts out at a certain rpm while sitting and driving.
it idles fine and runs fairly strong but it's almost like it's only running on one injector. it will only do 65 mph in 5th gear.
the code is a 43 if i remember right but the sticky on here says that's a
faulty tps and my buddies diagnostic software says that it's a injector malfunction.
here is the old thread i had:http://www.nissanforums.com/hb-truck...-high-rpm.html

Last edited by nissmo33; Aug 19th, 2010 at 08:50 PM.
#6 Old Aug 19th, 2010, 09:10 PM
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the injector power wire comes from the ecm and splits into two wires just before the plug in for the tbi..

so unsheath the wire loom before the tbi plug and find where the 2 wires go into 2 ..

check to make sure they are both connected...
#7 Old Aug 19th, 2010, 09:21 PM
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yeah i've already done all that and the connections where fine under the hood and inside the cab.
#8 Old Aug 19th, 2010, 09:23 PM
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one thing i did find while tracing those wires down is that a rat or something got in there and chewed some wires into, i spliced those back together but it still runs the same.
#9 Old Aug 19th, 2010, 09:26 PM
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Quote:
Originally Posted by zanegrey View Post
the injector power wire comes from the ecm and splits into two wires just before the plug in for the tbi..

so unsheath the wire loom before the tbi plug and find where the 2 wires go into 2 ..

check to make sure they are both connected...
you did mean where they go into 1 right?
on mine they come off of the tbi plug as 2 wires and in the main harness they splice into 1 and goes in the cab and then splices back to 2 wires.
#10 Old Aug 19th, 2010, 09:31 PM
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yes.. did u visually check to make sure the injectors are spraying??
#11 Old Aug 19th, 2010, 09:34 PM
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i guess i'll tell you what all i've replaced in the past couple of months:
the tps, 1 injector i bought it reconditioned, the ecm, and the dizzy i bought it used.
the only thing i haven't replaced is the tbi.
#12 Old Aug 19th, 2010, 09:36 PM
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Quote:
Originally Posted by zanegrey View Post
yes.. did u visually check to make sure the injectors are spraying??
yeah a while back u told me how to pull the dizzy turn on the key spin it and look down in there. that's when i replaced the one injector that didn't look to be spraying.
#13 Old Aug 19th, 2010, 09:57 PM
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the tbi's have either one or 2 actuators ..check the to see if they are working correctly..

u may want to consider checking all vacumn lines and or blocking them off one at a time to see if it affects the sputtering...
#14 Old Aug 19th, 2010, 10:01 PM
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where are the actuators located?
#15 Old Aug 19th, 2010, 10:11 PM
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