Running rich - Page 2

brodymulry · Sep 17th, 2007, 09:38 PM

Quote:

Originally Posted by Zen31ZR

The CHTS may keep the car from starting, I seem to recall that. Certain parts of the MAF may be dead, but not others. The hotwire assembly may be functional but it's controller may not be or vice versa. As I recall the MAF can be grounded externally and this may help it work properly, as long as everything else is working right. You may wish to check the harness where it passes near the headers, or anywhere within a couple inches of the engine, I've seen problems in those areas before.

Please excuse my ignorance, what is the CHTS?

I'm about the check the harness, no idea where it connects into the ECCS.
If i could unplug it, and run some small voltage (nothing on both ends) and see what the opedance is and voltage loss. Wish me luck.

Zen31ZR · Sep 18th, 2007, 11:40 AM

CHTS = Cylinder Head Temperature Sensor. I think it might have been on the turbo cars only, though. There's been a few threads in this section about it, maybe you can find them.

brodymulry · Sep 19th, 2007, 05:12 AM

Arr all these acronyums.

ok.
Your a Smart Man!!
Okay, did the diagnostic check (been meaning to do for a while now :\)

I get error 12, and error 13 (occasionally...as in, appears once in the 'eccs flashing sequence', and then does not appear again). So thats the Temp Sensor.

Error 12, is still the MAF. Error appears even with the MAF disconnected, then connected (blah blah, all varibles checked).

Tested the wires (in the cable) running to the MAF. All seems fine.
(yes i removed the ECCS

Just run 5volts DC through the cable, and checking continutiy with a multimeter selecting the color wire for + and testing to the common 'black' with -.

I got 100% through all the ones i was able to test in a closed 'loop'.

There are two colored (from memory) and then rest are all various thickness black. I dont really quite get it yet.. cause near the ECCS connectors inside the car, there are quite a few black wires, crimped together. Sorta forms a lumpy buldge *dont read outside the context

* with electrical tape around it. I'm assuming thats the ground.

> So my question is, looking at getting another MAF:

Does the temp sensor contribute to bad combustion (and backfiring), with the MAF on?

I'm going to say no, but please prove me wrong! I'd love to know what specifically it is.

Zen31ZR · Sep 19th, 2007, 10:37 AM

It might, but I don't remember all the details about the CHTS. Consult the factory service manual. I don't recall a whole bunch of wires crimped like that on my car. Maybe you should check that out. The FSM also has wiring diagrams. Really, at this point the service manual is more useful to you than I would be. Remember: RTFM (Read The #!%@^* Manual) Then ask any questions it doesn't answer.

cool34 · Dec 19th, 2007, 07:48 AM

Where is the MAF located I am a new Z owner