David K

http://www.zdriver.com/articles/full_article.php?ID=108

In other words, what I said.

One of those temp sensors DIRECTLY sends a signal to the ECU what the temperature the engine is running. The ECU then controls fuel that is injected into the engine from the fuel injectors. So yes, if there is anything obstructing the signal's path to the ECU, the engine will run very incorrect.

Unplug the connector you did not touch. Warm up the engine. Now go inside the car and look at the coolant temp guage. If it is all the way to the left, then the plug you took off was the coolant temp sensor. The one you did not take off, send the signal to the ecu. The connector you were playing with must be replaced. Go to a junkyard and cut the fuel injector connectors off an 84-89 300zx. Take them home and replace your old connectors by soldering them on. Make sure you connect the correct wires together. While you are at it, you may as well grab enough connectors from a 300zx at the junkyard to do all your injectors, and the other connectors throughout the engine. I used 300zx connector plugs. No complaints here, and they will never get brittle and break. They are grey, with a orange plug on top of them. Here you go. Good luck.

nice

I have the auto turbo pump. It doesnt create more pressure, it moves more oil (mass).

argggg. Yet another fine example of people out of touch with automobile history. There was never a 260zx. Not you Chris, just whoever made that video.

OMG hahahaha 3 pages and it gets better as you go on. HAHAHAHA. Of all the places to talk trash, he picks a lowly Honda forum. I just gained a great deal of respect for Honda guys after reading that. They do know their stuff!

does your head have a temp sensor on the passenger side of it? You should change that one before you change the coolant temp sensor.

Ok, with all due respect to the request of HybridZ admins, i wont post the pic here, but will provide the link. http://socalz.org/afm%20copy.jpg Now, the red arrow is where you adjust the tension on the spring. The tighter the spring is, it will provide the engine with less fuel/air. When this happens, the engine will starve itself if the AFM spring is too tight. The more slack in the spring, more fuel/air would be given to the engine under rpms. If it is too loose, the slightest rpms could make the engine run very rich, or even bog down from being too rich. The spring has to be set in a precise spot in order for the engine to run as it is supposed to. Now, the yellow arrow points to where you can adjust the amount of fuel given to the air, which in turn creates the correct air/fuel mixture. If you will notice, you can see the arm that swipes along the computer board down at the bottom. That is where the reading for fuel is sent to the ecu. This is how you adjust these two in unison. First, set the spring to where it should be by running the engine at normal operating temps. You will either 1)have rough idle, or 2) have a good idle. Now, if you have a rough idle, give or take on the spring a little. Try tightening it, or loosening it, whatever way works to smoothen the engine out. Now once you get it idling smooth, you move on to higher rpm settings. Rev the engine to about 4k. Yes it will be loud You will tell if the fuel mixture arm needs to be adjusted if it its missing and popping. While you have it at 4k, and it is not running correct, adjust the arm that the yellow arrow points to. Hopefully, if your AFM is good, this will make the engine run smooth and have power throughout the rpm range. But i must insist that you check your temperature sensors first and check for vacumm leaks. The most common leaks are at the AFM to Throttle Body rubber boot. You can also find more on the hoses on top of the Intake manifold. Your intake/exhaust manifold may also be bad. Good luck Chris.

The AFM's job is to administer the amount of fuel to the air coming through the AFM. There is an arm that moves along what looks like a computer board. That is the fuel part of the AFM. Now, the brass looking weight the arm is attached to is where i am going to have you look. There is a tiny screw that holds that weight in place. You can loosen that and adjust the amount of fuel that is dumped into the engine. You will notice, as you move it, the engine will smoothen out, or start putting.................... YOU KNOW WHAT, i am going out to the garage right now to get an AFM and i will post pics for you when i am done. Dont mind what i said above.

Ok there are 2 ways to adjust an AFM. One is to adjust the spring tension. The other is to adjust the small arm that is on the AFM weight that we are talking about. Try setting those in harmony. It took me a very long time to figure out how to do this, even though many people attempted to explain. Its one of those "you have to be there" type of things. There are many other Z guys in Phoenix. Do a search and locate some of them, or maybe post a request for help from guys in your area. I bet they would love to help.

Its gotta be the something along the lines of temp sensors or the afm. If you temp sensor is bad, you will have the same problem that i was having. The car runs great at cold because it will run rich because of a faulty sensor. When it gets up to temp, the mixture will not be right because the temp is not sending the correct temp reading. While you are int he engine bay, rev the engine to 3k/or until it starts popping and then just MOVE the weight on the spring inside the AFM. SLOWLY move it back, and move it foward and post back to let us know what direction made the engine run smooth.

WoooHooo i think we have officially found the HybridZ Summer Vacation house. Nice Z!

Dan, http://www.hybridz.org/ubb/ultimatebb.php?ubb=get_topic;f=10;t=001324

Chris remember i suggested the fuel pump when you were having the first problems? I think that may be the problem.

I have to get the 240 from Ventura down to my house which is about 80 miles away. I have a 77 i need to start and complete, and another 79 i need to do lots of basic maintanance on, not to mention my 79 which i am working with currently. I will eventually get it all done, oh yes, it will get done.............

no no no! i refuse! JK i changed it.

ooops i accidently posted in this thread and brought it back to the top. Curse me!

and L28 .020 flattop pistons and rings.

theres a RWD tranny that would bolt up to that?

If you want to give an expert a call, try this guy. Ask for Darin. West End Alignment Phone: (310) 808-9233 Trust me, calling this guy is worth it! He does suspension and alignment for racers and he knows his stuff! Im sure somebody here can vouch for that. Just give him a call and pick his brain.

66, may i suggest you take a look in our for buy/sell/trade forum? Often there are sellers with r200's.

no. the 4 lug went all the way up into some of the 300zx's.

Aux, gotta hand it to you man....you find the rarest things!!!