Cant Get More BOOST..

Started by 89BlackTGP, August 23, 2009, 12:55:34 PM

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flybynite

1989 TGP Pace Car
1990 TGP Red/Tan Leather

89BlackTGP

well i changed the knock sensor and no change in anything..

I did in fact buy that OBD 1 scanner off of ebay so i shall be getting that soon..

Is there anyway to check the injectors without taking the plenum off? like the engine harness that plugs into the computer? will that give the same reading? i just put the UIM on and dont want to buy more gaskets..
1996 Pontiac Grand Prix SE 3100/4T60-E (Black)

1995 Pontiac Grand Prix GTP 3.4 DOHC/4T60-E (White)

1990 Pontiac Turbo Grand Prix 3.1/4T60 (Black)

TGP Nick

Yes, you need to remove the intake plenum to check the injectors.

You should be able to re-use the gasket as well.
Nick
1989 Pontiac Turbo Grand Prix- LG5 - 4T60HD
2008 Ford Ranger XLT- 2.3 DOHC I-4 - 5MT
2012 Nissan Altima SR coupe- 3.5 V6 - 6MT

Prospeeder

The UIM gaskets can be reused a few times, but new ones are hardly 8 dollars.....
1990 TGP Chipped RU-1390 K&N
2001 Audi S4 Stage 2
1999 VW Beetle
1997 BMW 740iL

89BlackTGP

Adam,

I got that scanner today. What do you want me to look for when I have it monitoring the system? I'm not 100% how this works bit so far I got the basics and got my vehicle programmed in and played around with it with the car at a idle.
1996 Pontiac Grand Prix SE 3100/4T60-E (Black)

1995 Pontiac Grand Prix GTP 3.4 DOHC/4T60-E (White)

1990 Pontiac Turbo Grand Prix 3.1/4T60 (Black)

flybynite

1989 TGP Pace Car
1990 TGP Red/Tan Leather

89BlackTGP

Well I Ohm'd the injectors today and took the BOV off to be sure it wasnt leaking.. Well the BOV wasnt leaking so thats back on.. I took the wire off the wastegate so the MBC is running that again.. I double checked everything under the hood and it all looked good.. The readings from the Injectors below.. I am running Ford 5.0 Mustang Yellow Tops

Cylinder         Injector Ohm Reading

1                  14.9
2                  15.1
3                  14.9
4                  15.1
5                  14.9
6                  15.1


And my 2 spare injectors since i bought these from a Mustang with the V8 and only used 6 :laugh:

Spare             Ohm Reading

1                   14.1
2                   14.1


Im still confused on why i cant get anymore BOOST
1996 Pontiac Grand Prix SE 3100/4T60-E (Black)

1995 Pontiac Grand Prix GTP 3.4 DOHC/4T60-E (White)

1990 Pontiac Turbo Grand Prix 3.1/4T60 (Black)

TurboGTU

Did you cap off the bov. sometimes the spring inside is weak and when boost comes on it creaps open. I had a leak at the throttle body once. Bad clamp and torn hose.
Turbocharged 88 IMSA Beretta GTX <-dam stright.
90 ASC/McLaren Black TGP.

Powermaster slowed my progress like I was piloting the Queen Mary herself--

GPChief

Quote from: TurboGTU on October 21, 2009, 12:17:56 AM
Did you cap off the bov. sometimes the spring inside is weak and when boost comes on it creaps open. I had a leak at the throttle body once. Bad clamp and torn hose.

There is a leak somewhere......Its just finding it.  One of the first things I did on one of my cars was replace the hoses with silicone hoses and "Worm Gear" clamps, it mas made full boost ever since.
2004 GTP -  3.8 Blown - Only modding for MPG.
1997 GTP  - 3.8 Blown - Too many mods to list.
1996 GTP - 3.4 DOHC - Twin to my 1997.
1995 SE - soon to be a 3.8 turbo car.
1990 TSTE x 2 white cloth
1990 TSTE x 1 maroon leather
1990 TGP - 5 speed.

89BlackTGP

Quote from: TurboGTU on October 21, 2009, 12:17:56 AM
Did you cap off the bov. sometimes the spring inside is weak and when boost comes on it creaps open. I had a leak at the throttle body once. Bad clamp and torn hose.

No i replaced the BOV pipe with a stock pipe with no BOV.. and still did not solve the problem.. All clamps and couplers were inspected throughly and i made sure they were good..
1996 Pontiac Grand Prix SE 3100/4T60-E (Black)

1995 Pontiac Grand Prix GTP 3.4 DOHC/4T60-E (White)

1990 Pontiac Turbo Grand Prix 3.1/4T60 (Black)

TurboGTU

One last thing, x-over flinge to manifold leak.THey are not the best.
Turbocharged 88 IMSA Beretta GTX <-dam stright.
90 ASC/McLaren Black TGP.

Powermaster slowed my progress like I was piloting the Queen Mary herself--