350 TJ swap
- Thread starter jeepin916
- Start date
Bounty__Hunter
Super Moderator
Did you tag the wires when you took them off the old engine's sensors?
no i didnt tag the wires but a buddy of mine works for chevy and knows what everything is for i know some of it but not all so he can tell me. but if i run the wires from teh chevy harness to the jeep cluster do i still have to splice the wires together? or can i buy an adapter harness???
firemanharry
New member
You'd better do a little homework on hooking that stuff back up. You may have the right gauge going to the right sender, but the senders may have different resistance values and such. You'd probably be better off to adapt the senders from your 4.0 to the 350 instead of messing with the wiring.
Just my thoughts
Just my thoughts
well i was thinkin about it.. i can do electrical work but i hate it....
i could hook up the original gauges to the engine so the computer thinks everything is working fine but i can hide that under the dash and in place of my cluster i can punch holes in them and put mechanical ones in place of the electrical ones. u think that might cause any problems????
i could hook up the original gauges to the engine so the computer thinks everything is working fine but i can hide that under the dash and in place of my cluster i can punch holes in them and put mechanical ones in place of the electrical ones. u think that might cause any problems????
Bounty__Hunter
Super Moderator
I'd contact Painless Wiring if you want it done right.
Inspector-Gadget
New member
jeepin916,
Firemanharry gave you the straight skinny: in addition to the wiring paths, you must also contend with sending unit to dash gauge compatibility issues. The SB 350 into Jeep swap is so common that somebody will surely come along to give you the required info for gauge hookup in a TJ.
In the meantime, what follows might or might not be applicable to your situation, but for what it is worth: before the present "Bubbacon Edition" 85, CJ-7 entered in my life, there was a "Testosteroneacon Edition." An 82, CJ-7 with Chevy 350, HD-four speed, manhole cover sized Holly carb, headers -- all the usual stuff.
Here is how I met the dash gauge wiring challenge:
Voltage Gauge: No wiring modification required. Worked just by virtue of hooking up the starting-charging-ignition systems.
Oil Pressure Gauge: under dash mechanical aftermarket gauge.
Temperature Gauge: under dash mechanical aftermarket gauge. Engine end screwed into the 350 block below exhaust manifold between the 1 and 3 cylinders via a hardware store common plumbing fitting.
Gas Gauge: underdash mechanical gauge selected on the basis of the stock gas tank sending unit resistance values.
(Note: The OEM gas and temp gauges were fried before the engine swap. It was less expensive to go with aftermarket replacements.)
I realize that you would likely prefer to use your OEM in-dash gauges and none of the above deals with possible computer issues, but if the info you need is not provided or if you are in a big hurry to get your Jeep on the road with working gauges, the above work-arounds might prove useful.
Regards,
Gadget
Firemanharry gave you the straight skinny: in addition to the wiring paths, you must also contend with sending unit to dash gauge compatibility issues. The SB 350 into Jeep swap is so common that somebody will surely come along to give you the required info for gauge hookup in a TJ.
In the meantime, what follows might or might not be applicable to your situation, but for what it is worth: before the present "Bubbacon Edition" 85, CJ-7 entered in my life, there was a "Testosteroneacon Edition." An 82, CJ-7 with Chevy 350, HD-four speed, manhole cover sized Holly carb, headers -- all the usual stuff.
Here is how I met the dash gauge wiring challenge:
Voltage Gauge: No wiring modification required. Worked just by virtue of hooking up the starting-charging-ignition systems.
Oil Pressure Gauge: under dash mechanical aftermarket gauge.
Temperature Gauge: under dash mechanical aftermarket gauge. Engine end screwed into the 350 block below exhaust manifold between the 1 and 3 cylinders via a hardware store common plumbing fitting.
Gas Gauge: underdash mechanical gauge selected on the basis of the stock gas tank sending unit resistance values.
(Note: The OEM gas and temp gauges were fried before the engine swap. It was less expensive to go with aftermarket replacements.)
I realize that you would likely prefer to use your OEM in-dash gauges and none of the above deals with possible computer issues, but if the info you need is not provided or if you are in a big hurry to get your Jeep on the road with working gauges, the above work-arounds might prove useful.
Regards,
Gadget
