kevinparton

My 86 Non-turbo seems to be running a bit rich. Black soot in tailpipes & a make-your-eyes-burn smell thats very noticeable on shorts trips(<2mi). Car seems to run well otherwise. I've had the injectors cleaned & I've got a new O2 sensor. What can cause this & how do I fix it? Is their a way to adjust mixture?

kevinparton

This post seems to be getting lost. This can't be hard. Anyone with any ideas?

Green

Would your trailing coils not firing cause the car to run rich? O2 sensor reads wrong and thus incorporates wrong mixture? I'm asking this for myself too cuz I'm not sure if my trailing coil is working.. Checking after work today..

XLR8

iTrader: (52)

If your trailing coils weren't firing you would definatly notice. Your car would have very little power and rev slowly.

The problem with stock 2nd gen. fuel injection is there are alot of sensors that will make your car run like crap.
If a sensor is bad, the computer compinsates by making it run rich as a safety measure.

I would check the Throttle Position Sensor.
It's located by the throttle body on the radiator side. It's a little black box with a fat arm that push's inside when the throttle is opened.

Take a Multimeter, set it to ohm's. Disconnect the plug to the sensor. Place one probe on either of the lower two connectors and the other on the top one. Now slowly push in on the TPS. The ohms should range from 1k to 6k. I forget if it's 1k while pressed or depressed. If there is a dead spot or it doesn't start at 1k and end at 6k, it's bad.

Hope this helps

FPrep2ndGenRX7

When I took my convertors off and installed the straight pipe I had the same thoughts about running rich. The car ran fine but smelled bad(gas) and woudl burn your eyes if you were beind me in slow traffic with your windows down. Find someone who can check the codes if you can't and see if it pulls anything. A friend of mine had the same problem but when he switched to a stand alone injection controller it got better nto to mention he mades more power with the factory intake now.

FPrep2ndGenRX7

When I took my convertors off and installed the straight pipe I had the same thoughts about running rich. The car ran fine but smelled bad(gas) and would burn your eyes if you were beind me in slow traffic with your windows down. Find someone who can check the codes if you can't and see if it pulls anything. A friend of mine had the same problem but when he switched to a stand alone injection controller it got better not to mention he mades more power while still using the factory intake now.

NZConvertible

Wrong, that would happen if the leading plugs weren't firing. The trailing plugs do very little, and you'd barely notice if they weren't firing.Dead right. A check of the error codes would be a good first step.I doubt this would cause this problem, it has very little input on mixtures. It should be checked regularly anyway.

There is no way to adjust the mixtures on these cars (except idle). Something is wrong and needs to be diagnosed. Check to see if you're getting any error codes first (click here).

kevinparton

I checked the TPS. Checks okay with no dead spots. I guess I'll try to pull the codes & see what I get.