94toy4x4fever

Ok so I have been thinking about this swap for a few years now and I want to do it but there are still alot of quesions I have! I have searched for hours and havent realy figured stuff out! One thing that Im still wanting to know is wireing this thing! I want to keep all my stock guages! SO what all do i need to do to keep them! I know I want to run a 4.3 vortech so I will need the computer for it and dont know how I will work in the stock stuff also! Any info would be great!

86toylet

You will need to put your temp, and oil sensors onto the new engine. The rest is fairly easy. Since the Toyota gets its speedo from the t-case, thats not an issue. Let me know which motor you will be using and I'll get the wiring out to you (PM please). The 4.3 needs about 5 wires to run and about 12-15 wires for guages and other crap. Make sure you get the ECU, Harness, and ALL smog equipment (including canister, O2's and exhaust). The 87 fuel pump is adequate.

Where are you located (smog reasons) ?
Will you be using the Toyota Tranny or GM ?

94toy4x4fever

im in Idaho so there is no smog laws here! I will be running the toyota 5speed for now! So I will have to splice in wire to retain my stock guages? Hey thanks for the info man!

86toylet

No splicing, you will just retain your current wires, from guages to sensors. You will have to remove the sensors from the Toyota engine and put them on the 4.3. I tapped my thermo housing for temperature, and put the oil sensor onto my 4.3 block.

94toy4x4fever

Whats the best year of engine to use? I can get some engines with 50-70k for fairly cheep!

86toylet

The 4.3 TPI Vortec, is the best. I believe 96+ are the best years. I run a 1992 CPI, which is also a good motor, but has a fixable problem with the regulator.

94toy4x4fever

is there any clearence issues with a ifs? I have a 4inch lift on it now and will be doing a sas some time down the road

86toylet

I don't have IFS, so I don't know, but I imagine you will need body lift.

94toy4x4fever

Hey thanks for all the help! After I swap in my 5 speed I will talk with you some more about this swap!

desertcamper67

Thats a bunch of great info. I have been considering (dreaming about) doing this swap for years and it sounds like its not too much trouble. And 86toylet I believe you know your stuff on that subject.
I believe I read in 4WD and Sport Ute that there was a significant increase in horsepower and torque inthe early to mid 90's. Do you know what year and which models were commonly using this motor? Just S-10's?

86toylet

alot of Astro's used the motor. I got mine from a 2wd S-10 Blazer. There is a considerable difference in power and torque between the TBI and CPI/TPI. The CPI and TPI make around 35+ more HP than the TBI. A buddy of mine just dyno'd his TPI, and its making 240 HP bone stock.

86toylet

4.3 LITER, 262 CID
YEAR MAKE MODEL
85, 87-90,
92-93 Chevrolet Caprice
85-87 Chevrolet El Camino
85 Chevrolet Impala
85, 87-88 Chevrolet Monte Carlo
87 Pontiac Grand Prix
85 Pontiac Parisienne
05 Chevrolet Blazer ST
94-95 Chevrolet/GMC Blazer/Jimmy ST
90-93, 97-99 Chevrolet/GMC Chassis 1-ton P
88 Chevrolet/GMC Full-size 1-ton CK
85, 88-02 Chevrolet/GMC Full-size 1/2-ton CK
87-88 Chevrolet/GMC Full-size 1/2-ton RV
85 Chevrolet/GMC Full-size 3/4-ton C 2WD
88-95 Chevrolet/GMC Full-size 3/4-ton CK
87-88 Chevrolet/GMC Full-size 3/4-ton R 2WD
88-02 Chevrolet/GMC S10/S15 ST
87-95 Chevrolet/GMC Van 1-ton G
97-00 Chevrolet/GMC Van 1-ton Express/Savana G
85, 87-95 Chevrolet/GMC Van 1/2-ton G
99-00 Chevrolet/GMC Van 1/2-ton Express/Savana G
01-02 Chevrolet/GMC Van 1/2-ton Cargo Express/Savana
01-02 Chevrolet/GMC Van 1/2-ton Passenger Express/Savana
85, 87-95 Chevrolet/GMC Van 3/4-ton G
97-00 Chevrolet/GMC Van 3/4-ton Express/Savana G
01-02 Chevrolet/GMC Van 3/4-ton Cargo Express/Savana
01-02 Chevrolet/GMC Van 3/4-ton Passenger Express/Savana
90-04 Chevrolet/GMC Van Astro/Safari LM
85 Chevrolet/GMC Van Astro/Safari M 2WD
94-00 Oldsmobile Bravada ST

desertcamper67

Daaaaaaaang. Way more common than I thought. Good to know. Thanks for the great list.

Adam F

I've driven multiple vehicles with the 4.3. The ones that are always the fastest are the Astro/Safari vans. We have a 99 Safari at work that blows the doors off the 96 s-10 with the same 4.3.

94toy4x4fever

What years was the TPI made? I think thats the one im going to go with! Also I think im just going to try and buy a whole rig and just start swaping stuff over to the 4runner.

86toylet

TPI's are 1996+ I believe.

Joey Link

What sort of fuel economy can we expect out of a 1st Gen IFS 4runner with a 4.3 CPI/TPI?

jeffbland

im in the middle of this swap too (well about 80% done) and i always thought i would need to get a different fuel pump... from your post i understand that i wouldnt need one (89 22re pickup)

86toylet

I have 36" tires, 4.88 gears, 4.3 CPI, 700R4, I get 15-17 MPG.

Yes a 22RE pump will work for a stock 4.3. You may have to upgrade the size of your fuel lines but the pump is adequate.

jeffbland

sweet news! thanks for getting back to me