need help getting the bronco running

[kimcrwbr1]

go with the 198 unless someone here says the 180 will work better I am pretty sure these motors are designed to run hotter and staying with the design temp you will get better fuel economy and still have the performance

 

[kimcrwbr1]

I keep forgetting you have the 93 engine in there but stick with the stock stat I guess getting a motorcraft stat would be the best as stant parts are allways a gamble if you are going to get a good one If the engine does not come up to temp the computer might set the air fuel mix too rich for emissions

 

[shawn.m]

thermostats opening temp is really a misnomer. the motor will rise to the temp that it is comfortable at. If it opens at 180 and the radiator is small the temp will go up to where it is comfortable at. say 200 degrees

I live in California where the temps are 100 in the summer. We really like lower temps to give our motors a little chance to stay cooler longer.

I usually drill 2 1/8 holes in my thermostats to prevent air bubbles and I think it prevents heat cycling. which is what my motor is doing right now

 

[kimcrwbr1]

OK well good luck on the emission hopefully you can get the idle down and your cats are working good. Do you have to tell them you have a different engine from stock or are all the tests the same as far as acceptable limits of emissions

 

[shawn.m]

the motor was swapped in 2000 and has a California BAR referee sticker on the door from that time period.
they treat it as a 93 instead of a 89 as far as I know

 

[shawn.m]

just looked at title and since the last transfer was less than 90 days I should not have to smog! In cali you have to Smog at every transfer. Of course then today turns out to be furlough friday . Monday will stop by and register

 

[shawn.m]

went to junkyard and picked up a different IAC, put that on. idle is now down to 1100rpm

picked up a extra throttle body also. may try throwing that on also to see if that makes a difference.

 

[trail B2]

I got mine down by adjusting the idle screw down with the iac unplugged.Then readjust tps to .6 to 1 volt.It won't help smog but put in a IAC bypass switch in the cab for when it annoyes me.My 86 has a 93 ranger motor also but it has a camshaft senser maybe ones a cali car?

 

[shawn.m]

4.0 with camshaft sensor look to be explorer motors and without camshaft sensor is Ranger 4.0. SUV smog compared to Truck Smog.

 

[shawn.m]

grabbed the throttle body and TPS from the aerostar, put a thin layer of black RTV on the gasket. Put it on. The idle is down to 900 -1000 rpm. running even better. the gasket seemed really loose on the one that was on the motor

other thing helping is probably the seafoam coursing through the fuel system and cleaning it out