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#42643 - 05/07/04 01:24 PM Re: Grand Prix GTP
Layziepop Offline
Member
Registered: 05/05/04
Posts: 46
Loc: St. Clair, MI
Speaking of mods, I was talking to my brother about putting a smaller pulley on the supercharger (3.4") and he told me that if I did that, I would have to reprogram the computer because the air/gas mixture would be off. Is he correct?
_________________________
97 Grand Prix GTP, Red.
Nothing special except the big rust hole on the trunk.
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#42644 - 05/07/04 02:12 PM Re: Grand Prix GTP
BIGBALLER21L Offline
Junior Member
Registered: 04/21/04
Posts: 9
Loc: FORT PIERCE, FLORIDA
I AM SELLING A 1998 GRAND PRIX GT CUSTOM SHOW CAR FOR $6,800 OBO. THIS CAR IS A LOOKER AND HAVE BEEN MAINTAINED VERY WELL. KID ON THE WAY FORCES SALE. E MAIL ME FOR PICTURES AT MILLERJ@FPUA.COM OR CALL 772-216-6220 FOR MORE INFO.
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#42645 - 05/07/04 02:42 PM Re: Grand Prix GTP
HercMan(Rob) Offline
Member
Registered: 09/12/03
Posts: 14035
Loc: Fort Worth, Texas
You'll need basic mods some sort of CAI, Ubend delete coolet tstat, cooler plugs. Those at a minimum and if you really want to see a difference then you can add a reprogramed PCM.
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http://www.patriotguard.org
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#42646 - 05/07/04 03:54 PM Re: Grand Prix GTP
blown_gp Offline
Member
Registered: 03/27/04
Posts: 265
Loc: Memphis
The repro PCM will give you less KR and that`s why you will see the gains at he front wheels
_________________________
Cris Munoz
99 pontiac GTP mods:boost gage, RF/JVC sound system, TB spacer, ported TB, K&N CAI, Accel wires+NGK TR55 plugs comming soon: U bend-delete, 3.4 pulley, ported ex. manyfolds.
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#42647 - 05/07/04 06:06 PM Re: Grand Prix GTP
terapinn2000GTP Offline
Member
Registered: 03/17/04
Posts: 257
Loc: Oklahoma city
I still have the stock PCM. You will be fine with a smaller pulley as long as you do the proper intake and exhaust, colder plugs and t stat and it is a 3.5 or 3.4. save your time and money and drop to a 3.4!
_________________________
2000 GTP 2 door blue/blk metallic
3.4" SC pulley, K&N custom 4" FWI, 3" downpipe, Ubend/resonator removed, ported TB, TB spacer, NGK TR55's, 180 T'stat.
Coming soon: shift kit, DHP PCM, 1.9 rockers, ported manis and blower, and some handling mods.
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#42648 - 05/09/04 08:15 PM Re: Grand Prix GTP
anony00gt Offline
Junior Member
Registered: 05/05/04
Posts: 14
Loc: Randolph, NJ
Quote:
Originally posted by Layziepop:
Speaking of mods, I was talking to my brother about putting a smaller pulley on the supercharger (3.4") and he told me that if I did that, I would have to reprogram the computer because the air/gas mixture would be off. Is he correct?
The stock computer can probably sense boost (MAP sensor?) and compensate with fuel to a certain point. Past that point, you'll need to reprogram the PCM and/or start changing fuel system components...

I don't know what the stock pulley is, but a few people before me seem to say a 3.4" pulley is fine with a stock computer, so go for it smile

Then again, I have more experience playing with turbo cars (a lot of my friends have DSM's) than I do with supercharged cars, so I could be way off here...
_________________________
2000 Mustang GT - FOR SALE
1997 Grand Prix GT
1996 Saturn SC2
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#42649 - 05/10/04 01:36 PM Re: Grand Prix GTP
BIGBALLER21L Offline
Junior Member
Registered: 04/21/04
Posts: 9
Loc: FORT PIERCE, FLORIDA
I AM SELLING A 1998 GRAND PRIX GT CUSTOM SHOW CAR FOR $6,200 OBO. THIS CAR IS A LOOKER AND HAVE BEEN MAINTAINED VERY WELL. KID ON THE WAY FORCES SALE. E MAIL ME FOR PICTURES AT MILLERJ@FPUA.COM OR CALL 772-216-6220 FOR MORE INFO
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#42650 - 05/11/04 12:12 PM Re: Grand Prix GTP
Layziepop Offline
Member
Registered: 05/05/04
Posts: 46
Loc: St. Clair, MI
Well... first day I drove the vehicle (had to wait the weekend to finish the transfer of the title), and the fuel pump goes out on me. My brother can get the module for $200, but it's gonna be installation labor that kills me. I just don't understand how it went like that, so unexpectedly. I imagine it had to do with me hammer on it too much, but it was only 1 day!!! Well, I'm now out a car for a week, until I can get this job done.

Damn, $5000 for the car, $300 for tax and title, and now probably over $400 for the fuel pump. I feel ripped off. banghead banghead banghead
_________________________
97 Grand Prix GTP, Red.
Nothing special except the big rust hole on the trunk.
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#42651 - 05/11/04 12:16 PM Re: Grand Prix GTP
Javier Offline
Member
Registered: 06/06/03
Posts: 223
Loc: Pasadena, TX
on my first car (truck actually) my water pump when out my first weekend. I felt like crap! Good thing my brother had a spare in his garage. so it didnt cost me anything, but time.
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2000 GTP
All Black w/Black Leather
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#42652 - 05/11/04 04:11 PM Re: Grand Prix GTP
4 T 8 states Offline
Member
Registered: 01/11/04
Posts: 977
Loc: winter park,fl
i understand that you feel pretty crappy now but ust be thankfull that it broke down vs having it stolen or worse, acident. just my .02 centavos. hammer cause its spring!!!!!! cool
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1997 gtp sedan / green ext / tan int
all stock incl trunk mounted c.d.
general lee c.b. radio with connex board,talk back and echo plus a.m. f.m. high and low band.
bearcat bct-7 law enforment/weatherband scanner
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#42653 - 05/12/04 12:08 PM Re: Grand Prix GTP
Layziepop Offline
Member
Registered: 05/05/04
Posts: 46
Loc: St. Clair, MI
My hammer broke, so no hammer for me...

Now, does anyone know exactly how much work is involved in replacing the fuel pump? Everytime I bring it up, somebody laughs and tells me I'm screwed. So I imagine it's umm... not fun?

chicken confused
_________________________
97 Grand Prix GTP, Red.
Nothing special except the big rust hole on the trunk.
Top
#42654 - 05/12/04 12:52 PM Re: Grand Prix GTP
Marc Harbison Offline
Moderator
Registered: 05/01/02
Posts: 389
Loc: Fredericksburg, VA
Quote:
Originally posted by Layziepop:
Damn, $5000 for the car, $300 for tax and title, and now probably over $400 for the fuel pump. I feel ripped off. banghead banghead banghead
Do the fuel pump install yourself and save on labor. It's an easy install since there's a small door on the floor of your trunk. Most mechanics think you have to drop the tank to get to the pump. Look under the carpet in your trunk and you'll see the door. The pump's just on the other side.

Marc
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'00 Trans Am WS6 w/ 25K miles - Lovin' it!!
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RIP '99 GTP w/ 41K miles - Totaled in fire
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RIP '97 GTP w/ 192K miles - Totaled when broadsided
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#42655 - 05/12/04 01:06 PM Re: Grand Prix GTP
Layziepop Offline
Member
Registered: 05/05/04
Posts: 46
Loc: St. Clair, MI
Are you sure? I've had quite a few people tell me the pump is inside the tank, and is hard to get to.
_________________________
97 Grand Prix GTP, Red.
Nothing special except the big rust hole on the trunk.
Top
#42656 - 05/12/04 01:17 PM Re: Grand Prix GTP
AustinGTP Offline
Member
Registered: 05/23/03
Posts: 8078
Loc: Austin, TX
It is in the tank, but is accessable (sp) through the trunk.
_________________________
Bobby

Died 5/1/08, resurrected 5/15/08
ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.
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#42657 - 05/12/04 01:24 PM Re: Grand Prix GTP
Layziepop Offline
Member
Registered: 05/05/04
Posts: 46
Loc: St. Clair, MI
Well that's good news. I think I'll try that first before I pay a mechanic.

Can anybody explain to me or lead me in the right direction to figuring out step by step how to replace the pump? I'd be VERY appreciative.
_________________________
97 Grand Prix GTP, Red.
Nothing special except the big rust hole on the trunk.
Top
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