When I purchased my E30 a couple weeks ago, the check engine light was on. I checked the code and it was 1221. I found a DIY using a O2 from a ford mustang. I followed the procedure but found that my origional o2 was a four wire and the replacement was a 3 wire. In the DIY it says to just ground the grey wire to the chasis. I did so and I'm still getting the 1221 code. Any ideas will be appreciated.
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sigpic -
You could be getting that code now because your ghetto rigged sensor just isn't right. Get an a direct fit sensor meant for the car and replace the O2 sensor relay. The clear the fault code from the DME by disconnecting the battery for a few minutes. If the code returns the cause is likely to be from an upset in the A/F ratio. Check the rail fuel pressure and have a smoke test run.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, AL -
Will do. Thank yousigpicComment
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So I replaced both the o2 sensor and the relay and now getting a 1222 code lambda. Is there any DIY on the smoke test? I've called a few shops local to me and when I ask about a smoke test, they act like I'm out of my mind.sigpicComment
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It may not seem like it, but you are getting somewhere and the 1222 codes is indicative of an upset in the A/F ratio.
The problem with trying to DIY a smoke test is the need for; a smoke machine that can pressurize the intake/block with 2-4psi of oil (long persistence) smoke, something to plug the exhaust with, and an adapter that goes where the AFM connects to introduce the smoke. The cheapest smoke machine that I know of is about $1000.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, ALComment
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Wow! Okay so it looks like the search continues for a shop to complete the test. Thanks again for the drop of E30 wisdom.sigpicComment
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