throttlebody14

where is the MAF sensor located

 

SuperblackZ

Check in this pic, look to the right where you see a yellow plastic cap - the brake MC. Then right in front of that where the intake runs by, there is a metal section, silver colored, black connector on top with a red dot. That's your MAF. Yours may be in a slightly different location on the intake, but it's the only piece that looks like that. Can't miss it.
There is a usually thin gauge wire coming off the top of the MAF, black, it grounds the MAF to the body (sometimes to other places like the intake mani from what I understand). If you look really close, you may see the small black wire snaking off toward the cone filter, that's my ground wire. It was bolted to a not-clean, not well-connected spot for ground. It was corroded on the connector end where it grounds.

That's the basic grounding issue - that wire does not get a good ground, your idle may suck. There are a lot of other grounding MAF approaches, search the forum if yours isn't much like mine.

HTH

__________________
Former SCC Project SE-R
'91 B13 Black, JDM 10:1 CR SR20DE, Custom Intake/MAF w/JWT PopChg, 2.5" SSAC Header, Progress CO's 350F/250R, 3-way adj. 30-mm Progress FSWB, 22-mm Progress Rear Sway, Ground Control Plates, FSTB + FW triang braces, Progress LCA Brace, Energy Susp. bushings, Wilwood Brakes, Motgei Traklites 15x7", Kuhmo MX, RSTB w/triang trunk braces, R32 Steering Wheel
Team Progress

Matty Moto

I made sure my solenoid, for the remaining EGR vacuum system, received it's vacuum from the small hole in the intake pipe, after the MAF and not from the throttle body. The idle was revving between 1500-1900 RPM.

It now idles smoothly.
Unfortunately, it is still at 1900 rpm. (Throttle response is very good).

I realized the throttle cable was just a bit too tight, and made sure it was not pulling the throttle body, at idle, (not even a little bit).

The IACV Idle set-screw is stuck and will not turn. The throttle body idle adjustment screw is buried below every cable and hose for the intake, so adjusting it with the MAF and air-box in place, is not an option.

At least it runs.

I'll try to take the vacuum from the front of the MAF next, to see if it lowers idle to normal.

Maybe, I'll end the mystery and install the AEM, switch off all the annoying sensors and install the Wide Band, so I can see what my A/F is doing, in real time?

Except...
The 0-2 sensor is frozen into the larger bung port adapter and will not separate!

Now the entire exhaust needs to be swapped, so I can install the wide-band 0-2 sensor in a nice clean Down Pipe, then tune the idle with the new ECU.

Simple!

__________________
Matty Moto
*************
92' SE-R "The Red Barron"
92' SE Grocery Get'r