Common Omni, Horizon, Turismo, and Duster Repairs
Part number guide: http://www.hroads.net/~abcde/omniparts.pdf
Common complaints (Russ Leitheuser)
I've worked on these cars (Omni/Horizons) for many years and have found that this complaint is the most common among Horizon owners. I'll give you the most common repairs that fixed 90% of the cars. If one of these doesn't fix it then you've got to get the car to a REALLY GOOD repair facility. You'll need to do at least three thing to start getting the car back into shape.
First, have the carb rebuilt by a good carb shop. Don't install a factory rebuilt carb! Most of the factory rebuilds aren't worth the cardboard they're packaged in.
Second, replace the EGR valve. While you are at the dealership ordering the parts, have someone in the service dept. check for the Technical Service Bulletins that apply to your condition (there's a lot of them!). Might as well replace the Oxygen Sensor too.
Third, check the trigger wheel in the distributor. It's under the pick-up plate and is attached to distributor shaft. It should not wiggle around when you touch it, if it does replace the distributor.
One last thing, 1987s had Adaptive Memory for fuel control. You can reset the Adaptive Memory to run on its base level (Factory preset) by disconnecting the battery for at least 15 minutes.
Andrew Kelley wrote:
To fix holes in the floor, I used aluminum flashing which I pop riveted to the floor after I took out all the rusted stuff. I had first drawn out a pattern with paper. I transferred that to flashing and cut it out with metal shears. I then cleaned the area and then covered it COMPLETELY with with plastic roofing cement stuff. I then drilled holes for rivets and riveted it in. I then smothered that in plastic roofing cement too. Now it looks like the original body too! Works great, no leaks at all.. even in New England. I did this to my 1987 Horizon last year before winter.
The bumper of the Horizon is held in by 6 bolts, 2 in the front on the left and right and one underneath behind the front of the car. The two bolts in back are really hard to get out because Chrysler decided that it'd be cool to put round nuts in rubber and secure the rubber to the bumper channel that's curved. So, if you spend five minutes, you can usually "convince" the rubber or round nut to come off the bumper. If the nut stays in, use a small pipe wrench to grab on the nut and unbolt it. And beware of the nuts on the front, they are only sheet metal nuts.., because my bumper pushed the frame of the car I had to bend the shock absorbers on the bumper to fit, but only by 1/16".. the bolts should be 10mm but 1/2" works also.