ok I have a question here. I have a 89 Iroc Z with 350 TPI. Ok well I found out that my MAP sensor is not hooked up. Well heres is the problem I cant figure out where that little bastard conncects to on the wiring harness. I looked EVERYWHERE and I mean everywhere. PLEASE HELP ME

 

If your car has not been changed over to the sd you have a maf system and the maf is located inbetween the throttle body and the air filter the wires that are hooked up to it come from the pass side in the wire loom that runs along the pass. side front subframe rail.

The wires to the maf are
1. black and white
1. dark green
1. solid black
1. red
1. dark blue

The reason I think you are talking about the mass air flow sensor is that 89 cars don't have a map sensor. The map is a little rectangular box that is mounted on the pass side on the back of the plenum if the car has been changed I have no idea what to tell you.

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89 GTA w/700r4w/stage 2 shift kit,2800 converter, corvette servo, B&M mega shifter, TPIS bigmouth intake, TPIS large tube runners, TPIS 52mm throttle body, Ported Edelbrock centerbolt heads,Accell 30# injectors,holly afpr,GMPP LT4 hotcam,CompCams Pro magnum roller rockers,Edelbrock headers, flowmaster crossflow muffler,MSD 6A, accell coil,150 shot NOS. The new engine is in but I am still having some small problems.

 

no its not the mass air flow its the map. The sensor thats located in the plenium. I guess it gets the temperature of the air in the plenium.

 

or is it mat

 

if its located ON the plenum then its the MAT. i think the MAP is located elseware and have a vacuum hose running to it.

im not sure the color of the wires or which wire bundle its connected to, i guess i can look tomorrow if u don't get it figured out.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series Muffler added to Unkown CatBack, Ported Intake

http://www.geocities.com/david_angel_16

[This message has been edited by breathment (edited November 22, 2001).]

 

The sensor you're referring to in the plenum is the MAT (Manifold Air Temp). If that's what you're talking about then look for the connector in the wiring harness on the firewall on the passenger side. It may be hard to find. The two wires going to it are black and tan according to my Haynes manual.



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1986 Trans AM
355 TPI
4 Wheel Disc Brakes
9 bolt Borg Warner Rear (2.77's....oh joy) :P
6" rods, approx. 9.7:1 Compression, Stock TPI (soon to be ported), 24#/hr LTI injectors (cleaned and flowmatched by Cruizin Performance), Hedman Shorty Headers, 3" exhaust with 80 series flowmaster, SBC 993 heads completely redone and modified for 1.6 RR, 1.52 RR (for now), Comp Cams XE262-14 TPI Cam, Holley AFPR, TPIS airfoil, MSD wires, MSD 6-AL Ignition, Hypertech 53,000 volt coil.

Track times to come.

 

lol I didn't even think about the mat being back there.

[This message has been edited by poncho9789 (edited November 23, 2001).]

 

yeah its the MAT sensor. I just cant find the wire on the harness any where. How does it make my car run any worse cause thats the only code i get is for that sensor. I really need to find that wire and I really dont wanna pay someone to hook it up for me. Oh ya by the way I see 2 wires back there a tan and black coming off the harness, but they are grounded to the intake bolts.