IdahoKidd

Bought a brand new bosch O2 sensor and now (usually) get a solid green light when accelerating. Once the engine levels back off at idle, I get all kinds of light signals. Sometimes a rythmical pulse, sometimes a series of long and short pulses and none of them seem to repeat. It runs really rich with the O2 sensor hooked up and has sluggish acceleration. However, when I unhook the chts, I get good throttle response but no lights at the ecu. Hooking the chts back up, I get a momentary increase in rpms, then back to sluggish and rich. Changed out 3 chts', two used and one new with same end result. Why is the chts causing the grief? Also changed out to a different ecu. Same result.

Again, this is 83 zx turbo Hey thanks, I found a green light with the key on and engine off. No light at all when running. Can someone tell me where I can find more info on the lights, what they mean, etc. Telling me fsm doesn't tell me much(I'll look, tell me where) I've read and read and don't find any mention. Also, on the bottom of the ecm is an adjustment type screw. Where can I find info on this as well. The car starts and has good throttle response for about 10-15 seconds and then has really poor throttle response. I can manually open the flap in the afm and get it to match the throttle and rpms come right up, but it won't gather rpms on its own worth a damn. Any and all suggestions are appreciated. Searches (most) tell me that the green light should be flashing when car is running indicating o2 sensor is working. No flashing green light, so how do I test sensor?

I need to find a cas from a z31 to complete my swap on the turbo s130 ecu's. Also would like to find the maf plug with wires. I already have the ecu and the maf, but nothing else. Thanks, Leonard

Just drove 120 miles one way to pick up a 300zx turbo. Get there, beautiful car but had been hit in the rear, which was stated. Unfortunately, it was NOT a turbo car. What a bummer. There was really nothing I could justify buying it for. Damn!

Thanks. ECU's are out, can't find any lights at all. I know i am going deaf, but blind too....................

I can buy a running 86 300zx turbo, auto, running but smokes, body damage to the rear, for $300. I have a 77 280 with the 83zxt engine in it. Is there anything from this 300zx worth the purchase price for me to put into my zt or to sell outright? I already have computer and maf for same car but not the dizzy parts nor the wire harness pieces. Seems a shame to cut those out but maybe not?

When hooking up the tach in my 280 after installing the 83zxt harness, do I just use the resistor from the zxt harness and do away with the resistor already in place for the 280? use them both? can I leave the zxt resistor out and hook up to the existing tach wire at the coil? And; does the tach have to be hooked up and working for the car to run properly or can I leave the tach completely unhooked for now? Thanks, Leonard

I am working with a collection of many parts converting my 77 280 into a turbo car with 83 engine and wiring. First question: I have two ecu's, one from an 82 zxt with auto and one from an 83 zxt with auto. (checked numbers on Jim Wolf page) Are there issues with either of these in a stick shift car? IE, do I NEED to get the ecu from a manual car? Second: neither of these have a green led light on them anywhere that I can find. Am I looking in the wrong place or do they not have them, or? Thanks, Leonard

601 if it has the altitude switch. Yours does. But you already know all of this.

Man I hear you! I am going through the swap right now but at least I had the 83 donar car sitting here too. The info here on the swap is dreadfully innaccurate to say the least. At least 4 different posts have the same wires going different places (hot, ground, not used, pigtailed to another). The color wire diagram has colored wires to plugs that aren't correct, so then do you go by pin locaton or by wire color?? UGH! I got ignition and it actually started and ran, but severly overfuel and now only marginally stumbles. I am out of time soon due to scheduled surgery so won't get back to it for a month. Plus, I have read about the green LED for the 83 zx. I still haven't figured that out. I am assuming LED is a light? No such thing on this car. And, by the way, both the fuel injection relay and the fuel pump relay are the same color with many of the same wires. What a struggle to figure out that from the posts........ Good luck. I hope you have better luck getting help than I have had.

I suppose that is possible. The 280 has a fuel return line and am I am currently using the original pump and compete setup. The car (zx) sat for an unknown amount of time before I got it (police auction). Is it possible for the injectors to be stuck open? I'm going to do the things I did find in the searches, such as cleaning temp switch, etc. One post discusses afm adj and another throttle position switch. If this were a carb'd engine, I'd say the choke is stuck closed.

I've been installing the turbo motor and wiring from an 83zxt into my 77. To the best of my knowledge, I have everything hooked up and it actually started right up with a turn of the key. Almost immediately it started running really rich, to the point it doesn't even pretend to idle and now is so rich it won't barely run at all. Struggles along at near wide open throttle but dies as soon as you let up. I am sure it is something simple but man I can't find it. Can anyone offer up some advice or thoughts? Thanks

Hey dagold, I guess you found out this is a tough audience. Sad to know that even if someone does know the answer they aren't about to tell you. As for the brass cylinder, is the plug in a V shape? I just pulled the entire harness out of a 77 this morning and I recall exactly what you are talking about. I believe it is the altitude compensation switch for CA model cars. It should be "open" at altitudes below 3500 feet or so, therefore, unhooked it should run fine. It is for emissions. By changing the harness, I am assuming you are talking only the fuel injection harness? If so, it should be a piece of cake. I am not sure where the extra pins are that you are talking about however. Only one plug goes into the ecu. There is more information about non altered cars at zclassics.com Leonard

Good enough! Thanks guys.

While swapping the l28et from an 83 zx into my 77 280, can I install the cruise control as well or does that get too complicated? It would be nice to have the cruise.... Thanks, Leonard