1990 Ford Bronco Questions

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Have to upgrade system to allow use of the new freon required. Getting quotes from $750 to $3000. What would s real ballpark figure run?
their is power going to the starrter but it wont turn over
ABS LOCK UP REAR BREAKS GET SO HOT THEY SMOKE CANT EVEN DRIVE AROUND CORNER
I just put brand new tires on the rear of my Bronco and now i'm having problems with the front end. The problem is when driving down a straight roadway my bronco wants to go left or right on its own without me turning...
I have changed the icm an feul pump relay an still does the same thing
It just happened recently and I dont know what it could be i changed the fuel filter but that doesnt seem to be the problem
I was told to test for spark to take one of the plugs out and when I turn it over see if it sparks was none ,is this a way of testing?
every time i step on the gas it rattles pretty hard from im guessing under the motor. then whn i release the gas it runs smooth.
When I start the engine first thing it idles at the proper rpm, but as it warms up the engine goes up about 400 rpm and never comes down till it cools off.
It seems to stop ok but the light is on all the time. I have had the diff cover off and found chunks of metal in the bottom of the housing. There are no strange noises coming from the diff.
When shifting it jerks the whole truck, especially to reverse, makes a huge clunking but still works. New engine, when slowing down below 10 mph it sometimes shifts to early or acts as if gas is not getting through, I...
it does it whe i put it in gear.what could it be?is there an easy way to check the transfercase? its a borg/warner 1356
we adjusted all screws,checked for vacuum leaks and checked the distributor
wondering if it won't start without interlock switch on clutch peddle hooked up?
My Bronco idles at 1,300 RPM for 60 seconds after first starting cold then drops to 750 RPM in neutral. I then place the vehicle in drive & the engine goes to 1,100 RPM. If I turn the AC on in drive the idle drops bac...