3800 MAF sensor..

[SaturdaysGS]

I have sitting here a TB I bought from JET. It is a 97 GTP throttle body, and I am swapping the MAF's. The MAF sensor does NOT look like the one below, sans the part that bolts to the throttle body. It is short, and doesnt have the huge plastic airflow router thing. I don't have a pic right now, but am going to try to take one after while.

Heres a pic inside the 97 GTP throttle body

Now here is the the MAF on my 97.5 GS throttlebody. Very different looking..

Input? Opinions? Thoughts?

-Nick

Click to read more...

 

[M@]

your 97.5 GS has had the Throttle Body replaced in the past. That's a 99+ MAF sensor...

 

[SaturdaysGS]

your 97.5 GS has had the Throttle Body replaced in the past. That's a 99+ MAF sensor...
[/b]

Hmm.. Well, I guess when the engine blew right after we bought it, they replaced it with a 99+ engine. I suppose I shouldn't use that 97-98 MAF sensor in the 99+ TB then, correct?

 

[Turbocharged400sbc]

I suppose I shouldn't use that 97-98 MAF sensor in the 99+ TB then, correct?
[/b]

you cant, it wont seal the opening for the 99+ maf ducting is larger than the hole for the -98 TB maf sensor wires

 

[SaturdaysGS]

<div class='quotemain'>
I suppose I shouldn't use that 97-98 MAF sensor in the 99+ TB then, correct?
[/b]

you cant, it wont seal the opening for the 99+ maf ducting is larger than the hole for the -98 TB maf sensor wires
[/b][/quote]

Could you elaborate more? I just took the car for a spin about an hour ago with the -98 MAF installed and had no SES light, and no other problems. Car ran better too.

I know the 99 MAF won't fit in the older throttle body, that was evident right away.

 

[M@]

the car will not read air correctly at all...

Did you scan? I bet it was horrendously lean the entire time.
You're better off running off the VE table until you get a replacement MAF.

MT

 

[SaturdaysGS]

the car will not read air correctly at all...

Did you scan? I bet it was horrendously lean the entire time.
You're better off running off the VE table until you get a replacement MAF.

MT
[/b]

Sounds like what I will do, I didn't scan, but I figured swapping them wouldnt work out all that well.

Thanks Mat, and James.

..Damn, if only I knew it had a 99 TB on it.

 

[Turbocharged400sbc]

Could you elaborate more? I just took the car for a spin about an hour ago with the -98 MAF installed and had no SES light, and no other problems. Car ran better too.

I know the 99 MAF won't fit in the older throttle body, that was evident right away.
[/b]

i dont know for sure but it looks like the oring that seals the sensor on the 98\/ sensor is smaller than the oring sealing area on the 99/\ TB

so you would end up with the possibility of a small amount of unfiltered air getting past it and that air potentially being unmetered (not sensed by the MAF)

Mat is def right about the maf reading incorrectly without the properly calibrated airpath past the sensor wires...i'd bet it works but with airflow the air near the walls tends to stagnat/not move at the same velocity as the air in the middle of said orifice

i'm planning on an external MAF for the 442 so i removed the 98\/ tower and sealed the maf hole so we could use (till we score an LQ4) the smaller maf the 3x00 engines use (which we have one for free )which has an airfoil shaped tower so it should flow well till we get the LQ4

 

[SaturdaysGS]

So.. since I have a 99+ Throttlebody/MAF on my car, and am running a DHP 1.0 pcm for a 97.5 GS, I'm assuming thats not an ideal situation? What problems (obviously minor) could I be experiencing. I know this car has never (even stock) had decent fuel trims, in my care atleast.

 

[Turbocharged400sbc]

what build date is your GS? 97.5 would prob be around july/august of 97...

i remember reading a Rov "the home depot Guru" V :lolsign: post about the Inj table being screwy with the 97's

but i shall take leave of this subject since others know more than I....

 

[SaturdaysGS]

what build date is your GS? 97.5 would prob be around july/august of 97...

i remember reading a Rov "the home depot Guru" V :lolsign: post about the Inj table being screwy with the 97's

but i shall take leave of this subject since others know more than I....
[/b]

I remember that post as well. I believe it came up because he was figuring out tuning on syP's car. This car really needs a custom tune just for the fact that its a 97. Although DHP is good with generic tunes, 97's really are their own breed. I need a money, then I need a PT.

I will check the build date tomorrow, when I can see outside lol.

 

[M@]

<div class='quotemain'>
what build date is your GS? 97.5 would prob be around july/august of 97...

i remember reading a Rov "the home depot Guru" V :lolsign: post about the Inj table being screwy with the 97's

but i shall take leave of this subject since others know more than I....
[/b]

I remember that post as well. I believe it came up because he was figuring out tuning on syP's car. This car really needs a custom tune just for the fact that its a 97. Although DHP is good with generic tunes, 97's really are their own breed. I need a money, then I need a PT.

I will check the build date tomorrow, when I can see outside lol.
[/b][/quote]

eh, I wouldn't buy into that crap about 97s, my 97GS ran all its times on an AFC'ed DHP1.0, and ran 12s on a straight DHP1.0, NO tuning on top of it.

Regardless of build date, that is NOT the throttlebody that your car came off the line with. Those parts weren't even on the assembly line until the 99 model year. Running that TB won't really hurt, but it would be best to get a TB from the correct year on there.

MT

 

[SaturdaysGS]

<div class='quotemain'>
<div class='quotemain'>
what build date is your GS? 97.5 would prob be around july/august of 97...

i remember reading a Rov "the home depot Guru" V :lolsign: post about the Inj table being screwy with the 97's

but i shall take leave of this subject since others know more than I....
[/b]

I remember that post as well. I believe it came up because he was figuring out tuning on syP's car. This car really needs a custom tune just for the fact that its a 97. Although DHP is good with generic tunes, 97's really are their own breed. I need a money, then I need a PT.

I will check the build date tomorrow, when I can see outside lol.
[/b][/quote]

eh, I wouldn't buy into that crap about 97s, my 97GS ran all its times on an AFC'ed DHP1.0, and ran 12s on a straight DHP1.0, NO tuning on top of it.

Regardless of build date, that is NOT the throttlebody that your car came off the line with. Those parts weren't even on the assembly line until the 99 model year. Running that TB won't really hurt, but it would be best to get a TB from the correct year on there.

MT
[/b][/quote]

Well since thats not the throttle body, that means that the rest of the engine is a 99+ engine (it was replaced the day after we bought it). Would it be best to just put the 97 TB I recieved, on it? OR to have a 99+ MAF table put in?

 

[Sinister Drag Designs]

put the table in, dont downgrade your TB

 

[SaturdaysGS]

put the table in, dont downgrade your TB
[/b]

I suppose you dont have the support for that on your PT, huh Bob?

Finding someone to do that is gonna be the only problem I have lol..

 

[J.E.T.]

Nick - just to help out - I'd gladly take back the tb I sold you if you cannot use it.

Errr, 20% restocking fee. Hehehehe.

J.E.T.

 

[Sinister Drag Designs]

sorry i still havnt got the open file for all the years yet.
no one told you to buy a buick :lolsign:
good luck, check club gp for someone with a PT for regals..........doesnt Matt T have a PT and a 97.5

 

[SaturdaysGS]

Nick - just to help out - I'd gladly take back the tb I sold you if you cannot use it.

Errr, 20% restocking fee. Hehehehe.

J.E.T.
[/b]

Yeah, I dont think I'll be using it.. thanks though! Send me a PM when you get a chance. We'll set something up.