thanks man.
couldve almost gotten a ram >.<
manifold air temp sensor on 85?
Thread Starter
Drifting
Joined: Aug 2013
Posts: 1,463
Likes: 0
From: Everett Washington
manifold air temp sensor on 85?
is there a manifold air temp sensor on an 85 that screews into the bottom of the plenum? because i have some broken sensor in there and is this it? http://www.autozone.com/autozone/par...44824_0_0_4439
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
is there a manifold air temp sensor on an 85 that screews into the bottom of the plenum? because i have some broken sensor in there and is this it? http://www.autozone.com/autozone/par...44824_0_0_4439
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
Your car should have recorded and error code 25 for the bad.disconnected sensor on the underside of the plenum. Technically this is called the IAT Intake Air Temperature sensor
I think you might have idle problems with the looks of the IAC. Looks like it took on a little water. I know that Washingtonians don't tan, they rust. But I didn't know that this also applied to the IAC!!
I think you might have idle problems with the looks of the IAC. Looks like it took on a little water. I know that Washingtonians don't tan, they rust. But I didn't know that this also applied to the IAC!!
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Race Director
Joined: Apr 2002
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From: Anaheim CA
Watch out for the connector type. The connectors changed in 1987 and the later parts won't plug in.
The MAT (Manifold Air Temperature) sensor harness is about 12" long. I would take it to the auto parts store to make sure it plugs into the new sensor.
The MAT (Manifold Air Temperature) sensor harness is about 12" long. I would take it to the auto parts store to make sure it plugs into the new sensor.
Le Mans Master
Joined: Mar 2004
Posts: 5,107
Likes: 171
From: Dublin CA
Next time you need parts, check out RockAuto online. There will be a small shipping charge, but most of the time you can save considerable money.
I was up en Everett last week on Colby. The weather was great.
I was up en Everett last week on Colby. The weather was great.
Drifting
Joined: May 2013
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From: Reno Nevada
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
And most of the time you will have the option of purchasing original AC Delco parts.
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
I believe the question was specific to what the MAT does? The only caveat in the programming is in reference to the EGR enable temp that I'm aware of? Fuel not being dependent on it as suggested by others.
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
The EGR temperature switch is a diagnostic switch. It senses heat from exhaust gases downstream of the EGR. If the switch does not heat up and close within 4 minutes of the EGR opening, a code is set.
Drifting
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
According to the FSM, the only purpose the MAT serves is to delay opening of the EGR until manifold temps reach 5 Deg C.
The EGR temperature switch is a diagnostic switch. It senses heat from exhaust gases downstream of the EGR. If the switch does not heat up and close within 4 minutes of the EGR opening, a code is set.
The EGR temperature switch is a diagnostic switch. It senses heat from exhaust gases downstream of the EGR. If the switch does not heat up and close within 4 minutes of the EGR opening, a code is set.
Melting Slicks
Joined: Mar 2008
Posts: 2,141
Likes: 76
From: Santa Maria, CA
Interesting? I find it amazing the difference between the FSM, and what is actually programmed. I opened a 86 AANM this morning and it showed -17.50 C. The FSM also says the fans come on at 228, but they're programmed at 107.75 C which converts to 225.95 F. I know I'm being picky, but you'd think they'd be more accurate.
My manual states that the cooling fan should run if coolant temperature is greater than 106 C. But the constants table is set for 107.75 C.