BlazinOR

Got the new Auto Xray 10110 scanner, went out to the truck first thing this morning, was about 45 degrees out last night. Truck outside. Upon startup, the Manifold Air Temp read 176*.........huh? Might this incorrect reading be partly (or fully) to blame for my poor cold motor drivability issue?

Also, is this controlled by the CTS for the intake? Where exactly is this one? I know where the CTS for the coolant temp is (front of motor under throttle body) but can't readily see the other CTS.

Thanks in advance!

------------------
'79K5 Blazer with 406TPI

[This message has been edited by BlazinOR (edited November 11, 2001).]

Vader

Blazin,

The IAT/MAT sensor is on the underside of the intake plenum (nice location, huh?). If the sensor is truly reporting 176°F, the cold start injector or cold start subroutine will not function.

Tha could be a problem.

------------------
Later,
Vader
------------------
If you want to beat the World, it might reach up and pull you down...
Adobe Acrobat Reader

BlazinOR

I take it the removal of the runners/plenum is necessary to get at this CTS..........


------------------
'79K5 Blazer with 406TPI

88 WS6 TransAm GTA

iTrader: (1)

all ya have to do is pull off the plenum... its right there on the underside towards the back. no need to remove the runners.

------------------

92' White Trans Am Convertible, 305 TPI, 5 spd. 2:73's, Edelbrock TES, Accell 8.8's, Hypertech Stage II, TPIS Air Foil, Ported Plenum, K&N TB Cone Filter, AFPR, & A Little Bit Of Attitude!
-Best ET: 14.944 @ 93.11

88 Gunmetal GTA Hardtop... Project In The Works!

"GUYS, WE NEED TO FIND A MUSTANG TO RACE... THERES ONE! HOLY SH*T SHES HOT! SHES NOT GONNA GO... NAH... HOLY SH*T SHES GOIN!"

BlazinOR

Thanks..........but clue me in one more time here. Do you have to use new 'runner to plenum' gaskets when you do this? Do you have to loosen the runners from the manifold to get the plenum out?

TIA

------------------
'79K5 Blazer with 406TPI

Ed Maher

IF it's not a MAF system, and if you don't funk up the gaskets when you take the plenum off, then yes, IMO you can reuse the plenum-runner gaskets (i am on mine). SD cars are not so sensitive to vacuum leaks as to be affected by a miniscule vacuum leak. MAF cars despise any air coming in after the MAF however.
You shouldn't have to loosen the runner-base bolts to get the plenum out.

BlazinOR

Thanks Ed. Appreciate your and others' knowledge on this board.

It is a SD system, so as you said, if the gaskets are OK I will re-use. Tackling this one Saturday probably.

------------------
'79K5 Blazer with 406TPI