runnig very rich /stock setup

[Jason81NA,82RBtt 0]

My friend and I have just finished installing and wiring up a turbo motor in a 81na car. We had to replace the injectors, I had some good injectors from a 300zxT and we installed them. Now the car runs very very rich(never really ran before). To the point of fouling a set of plugs in about five minutes. I have tested and checked the fuel pressure,adjusted the TPS, and much more stuff tring the get the car to run better.I now have the AFM set a fullround tighter than stock, and the car will aleast stay running SOME. Oh by the way to get the car to start you have to unplugg the fuel pump, then while tring to keep the car running, plug it up so that the car will stay running.

 

Thanks for any help

Jason

[Jason81NA,82RBtt 0]

Never mind I think I have figured it out by doing a search on zcar.com. It turns out that I have the "start signal wire" hooked up wrong. I have it hook up like a ACC wire going to a aftermarket radio.Not where it only has power when the starter is engaged.

[scottyMIz 15]

If you still have problems with it i had the same problem but everything was hooked up right and it turned out to be the ecu in my car.I adjusted my afm alot like almost all the way closed.I have bigger injectors too and that's how i tuned mine in.

[SleeperZ 7]

Boy, I sure hope not...He bought my old stock ECU.

[Jason81NA,82RBtt 0]

It turns out I the "start signal" hooked up right in the first place. The car is not going into a closed loop mode.What are the other reasons for the ECU to go into closed loop mode.

 

Thanks

Jason

[DAW 1]

It sounds likely to me that your water temperature circuit is open. Either the wires or connectors are bad or the sending unit is open. Computer thinks car is on Arctic Circle and is giving it full rich. Check to eliminate this, could also be cyl head temp sensor open, but water temp causes more dramatic effect.

DAW

[Guest Aaron]

I saw similar once on a L6 Maxima. Replaced ECU, AFM, to no avail. It ended up being a short in the harness between the AFM and the ECU.