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[hurryupcole]

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[jbontke]

What is the penny trick? Is the TPS adjusted properly?

[hurryupcole]

The TPS is adjusted properly via Bentley manual specifications. It is also a new TPS that was replaced recently. The penny trick is when you drill a hole into a penny and stick it on your idle control valve so that you can restrict the air going into the idle control valve via the size of the hole you made in the penny. The larger the hole, the higher the idle. The smaller the hole, the lower the idle.

[82eye]

The TPS is adjusted properly via Bentley manual specifications. It is also a new TPS that was replaced recently. The penny trick is when you drill a hole into a penny and stick it on your idle control valve so that you can restrict the air going into the idle control valve via the size of the hole you made in the penny. The larger the hole, the higher the idle. The smaller the hole, the lower the idle.

i couldn't dig through the block of text but i thought icv / vacuum as well.

[hurryupcole]

i couldn't dig through the block of text but i thought icv / vacuum as well.

ICV is working properly, cars been smoke tested several times

[82eye]

ICV is working properly, cars been smoke tested several times

there was something about no 02 sensor in there as well. first thing i would do is get the car back to stock.

[packratbimmer]

I'm sure your dad is a fine electrician so I do not want to challenge that out of respect. With that said, it is of the highest importance that all connections are repaired COPPER TO COPPER. I always overlap the copper strands attempting to weave them together, crimp a connector over the "patch," spray the connection with dialectic spray and shrink wrap. Many of the fuel injection circuits run on resistance values based on stock harness conductivity - one false repair and the data going to your ECU is wrong.

[hurryupcole]

Understood, everything was spliced via soldering, all copper to copper connections were twisted together tightly, then soldered, and heat shrink to cover the splice and I promise you the car doesn't miss a beat. As per the injector side of the wiring harness, I had no injector pulse after the fire obviously because that's what happens when you have a short in that circuit. Well actually I had 4 sets of injector wires melted together so I ordered some late model BOSCH EV1 injector plugs to make for easy quick disconnect when I want to get them rebuilt, take the head or intake manifold off, etc. I also had alternator wires burnt together which is okay shouldn't effect anything with my ECU idle readings. That was also fixed as well though.. the battery light was lit up on the dash, after my electrical work it went out and the battery was charging again. That is interesting though now that I think about it, is there a way to test and see the that my ECU is getting the proper values from all of my sensors? I do have a Bentley manual I can reference to if the info is in there.

[hurryupcole]

there was something about no 02 sensor in there as well. first thing i would do is get the car back to stock.

I am going to an exhaust shop this week to get a new system and bung for an o2 sensor installed into it. I already have a new o2 sensor waiting for the exhaust. I don't believe that is my problem because the car ran fine without it for a year. But I am still going to get it running how it is supposed to be. I guess this would affect my fuel economy as well.

[82eye]

I am going to an exhaust shop this week to get a new system and bung for an o2 sensor installed into it. I already have a new o2 sensor waiting for the exhaust. I don't believe that is my problem because the car ran fine without it for a year. But I am still going to get it running how it is supposed to be. I guess this would affect my fuel economy as well.

it throws the car in to a closed loop. the ecu in motronic 1.1 won't change things by a lot, but it can't do much of anything without the 02 input. i would expect it to result in a poor warm running condition.

you mention you have trouble right from start up though, so the missing 02 sensor may be only one part of the problem.

[packratbimmer]

Also, if you are still running a cat, it is likely that you are just loading it up with unburned crud between idle and open road "cycles." The oxy sensor is key here.

[e30austin]

you need to eliminate the yellow coolant temperature sensor. cut the ends off the connector and bridge the wires together. report back.

[jbontke]

you need to eliminate the yellow coolant temperature sensor. cut the ends off the connector and bridge the wires together.

What is the purpose? The coolant temp sensor changes the maps the ECU uses. Does this trick it to choose one particular temp for fuel mapping?

[e30austin]

yellow temp sensor handles cold start to 20c. if that switch fails, it's always thinking it's in open loop. BMW no longer sells a correct switch as a replacement for the yellow one. the purple is a sender only, no switch involved. the "fix" is to eliminate it because it's absolutely pointless.

[jbontke]

yellow temp sensor handles cold start to 20c. if that switch fails, it's always thinking it's in open loop. BMW no longer sells a correct switch as a replacement for the yellow one. the purple is a sender only, no switch involved. the "fix" is to eliminate it because it's absolutely pointless.

Is this the one that also controls the cold start injector?