Poor Gas Miolage

Started by RedZMonte, April 07, 2004, 09:19:17 PM

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RedZMonte

my car seems to be Running very rich. i replaced my x-over and got a universal 1 wire O2 from Advance auto parts. and it still runs rich. black smoke out the back and a very rich smell. I am getting HORRIBLE gas miolage. I do have new plugs and good wires. My gas tank seal where the sending unit seals to the tank needs replaced, could that be a problem or is there something else, OR do the TGP's Get really shitty gas miolage?


Shane
Shane "RedZMonte"
1995 Monte Carlo Z34 (LQ1)
1992 Lumina Z34 (L67)
1990 Turbo Grand Prix (LG5)

god910

A Chip?  Do you have it?  Say what again.  Say what again.  I dare you.
1990 Turbo Grand Prix Black Sunshine
282 5 speed, Custom Chip, 1G DSM BOV, K&N on turbo, Centerforce Clutch, Accel 8.8 Wires, no kat, straight exhaust, TB bypass (200HP), Jeff-M cro$$over ;)
Jay Warfel
Muncie, IN
2nd TGP "TestBed" 90, Black JeffM TG160 & X-over, ractive filter, 15.21 @ 90 mph
2003 Sonic Yellow Subaru Impreza WRX  Turbo XS Stage 3
Perrin GT35R, 2.5 STi Block, JDM 6 speed swap underway.
Goal: 450 AWHP, mid 11's.

RedZMonte

Quote from: god910A Chip?  Do you have it?  Say what again.  Say what again.  I dare you.

Nope... how about i just crank up the boost and lean it out ;)
Shane "RedZMonte"
1995 Monte Carlo Z34 (LQ1)
1992 Lumina Z34 (L67)
1990 Turbo Grand Prix (LG5)

RareGMFan

What about the coils and ignition module?  And have you checked the injectors?
1990 Pontiac Grand Prix SE McLaren Turbo (1 of 2725), 1989 Pontiac 6000 STE AWD (1 of 1376)
1990 Pontiac Grand Prix STE McLaren Turbo (1 of 1000), 2001 Pontiac Grand Prix GTP Special Edition



ShuGTXTurbo

If you have black smoke coming out the tailpipes you have more than a rich fuel problem.  Does your turbo spool fine.  The black smoke could be from oil leaking through the seals in your turbo like mine does.  If the turbo is bad it can cause you to run rich because you aren't getting the right exhaust flow.
1990 Grand Prix GTX ASC McLaren Turbo 13's maybe soon!!
1991 Cheverolet S-10 2.8 V6 5-speed
www.hollywoodmotorsports.5u.com

Chris A

Check the FPR. Pull the vac hose off and see if it spews fuel. then get a real o2 sensor if all the others have checked out.


And the path of the rightous man...

WHAT!

:snipersmile:

LukeZ34

Quote from: god910Say what again.  Say what again.  I dare you.
I double dare ya mothafucka, say what one more god damn time!   :lol:
Former owner of 2 TGP's..


2006 Pontiac Grand Prix GXP -41k, Transgo Shift kit, auxiliary trans cooler, DiabloLew Tuned.

1987 Suzuki Samurai JX Tintop - Weber DGV5E carb, 2" exhaust, Calmini Header, 162k

RedZMonte

Quote from: ShuGTXTurboIf you have black smoke coming out the tailpipes you have more than a rich fuel problem.  Does your turbo spool fine.  The black smoke could be from oil leaking through the seals in your turbo like mine does.  If the turbo is bad it can cause you to run rich because you aren't getting the right exhaust flow.

i have found a very small ammount of oil in the charge pipes. but tipically black smoke if fuel and blue smoke is oil and white smoke that smells like pancakes is coolant.


What should i check for as far as the injectors go? I did have a bad coil. i replaced it and the car runs fine. the car runs perfectly fine just very rich. my dyno chart showed the a/r mixture was off the scale rich.

RedZ
Shane "RedZMonte"
1995 Monte Carlo Z34 (LQ1)
1992 Lumina Z34 (L67)
1990 Turbo Grand Prix (LG5)

RedZMonte

btw: what kind of gas miolage do you guys get. like i said mine drinks like a mofo. i get HORRIBLE gas miolage.
Shane "RedZMonte"
1995 Monte Carlo Z34 (LQ1)
1992 Lumina Z34 (L67)
1990 Turbo Grand Prix (LG5)

jheiv

wtf is miolage... i was thinkin it was a one time deal like a typo-- but its all over.

I believe the word may be...
mileage?
1989 Red TGP
Mods: KYB-GR2 Struts and Mounts, Prior PMIII, K&N Filter, K&N Breather, 8.5 mm Wires
Upcoming: TopGun Chip, Coils, X-Over

dbtk2

I usually average right around 16-16.5mpg, but that is 90+% city driving.  I get 32-34mpg on the freeway.  

Shawn
90 Maroon GP STE 3.1 I/C Turbo - SOLD!  :(
14.695 @ 94.49 w/2.228 60'
99 Green GP GT
9.75:1|K&N|160 tstat|no cat/ubend/res|ALT UD|Shift Kit|XPZ cam|Ported M90/TB/LIM/Heads|Powertuned|Pacesetters|42lb/hr|Stg 2 I/C|MPS|2.45"|ELEC WP|Zex 75/100/125|Walbro|ZZP IS|15/16"|AR103|Rollmaster|8 rib|MLS .052|ARP Head Studs|Billet FP|Alum Cradle
11.9912 @ 112.99 w/1.729 60', 347whp/417wtq on 93 octane/mustang dyno.

RareGMFan

Quote from: RedZMonte
Quote from: ShuGTXTurboWhat should i check for as far as the injectors go? I did have a bad coil. i replaced it and the car runs fine. the car runs perfectly fine just very rich. my dyno chart showed the a/r mixture was off the scale rich.

Check the resistance and make sure it's putting out the correct amount of ohms (I don't recall what the correct number is, but if you do a search, I'm pretty sure it was mentioned here before).  They may just need a good cleaning, too.  Also, the FPR was a good suggestion, too.
1990 Pontiac Grand Prix SE McLaren Turbo (1 of 2725), 1989 Pontiac 6000 STE AWD (1 of 1376)
1990 Pontiac Grand Prix STE McLaren Turbo (1 of 1000), 2001 Pontiac Grand Prix GTP Special Edition



mfewtrail

As far as gas mileage goes, I get ~26-27mpg driving like a grandma in a mix of 90% highway, 10% city driving.
'93 SE, '90 Black/tan TGP, & '90 Red/tan TGP