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got a 1997 WS6 get shit milage

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Old 05-07-2007, 10:56 AM   #1
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Default got a 1997 WS6 get **** milage

i just bought a car that has 100k on it. new opti. i am in town getting about 12 mpg. i know i should get more than that. when i cold start it. takes about 3 to 4 seconds of cranking while having the throttle open a little. it always smells rich as hell and also my temperature guage goes in upwards of 220-235 range. my friend thought it could be the temp sending unit on the heads. but i dont want to dick with trying to check that right now if its something with like the fuel pressure reg. any opinions are greatly appriciated.
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Old 05-07-2007, 01:25 PM   #2
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Heres a thought... Keep you damn foot out of it Keaton!!! LOL
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Old 05-07-2007, 02:01 PM   #3
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You can guess all day long....but, until you hook up a scanner to see what the sensors are saying, you'll never know. Could be a temp sensor, it could be O2 sensors, etc.
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Old 05-12-2007, 02:17 PM   #4
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only thing is that it always has to crank for like 5 seconds just to start and it always smells like gas. i dont really know what to look for. i was thinking possible sensor on the head. i dont have any codes being thrown. anyone have some suggestions
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Old 05-12-2007, 02:23 PM   #5
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Based on the symptoms, I'd check for leaky injectors / fuel pressure regulator or improper fuel pressure. That would be a good place to start.
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Old 05-13-2007, 11:49 PM   #6
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what would it do if the fuel regulator is bad. and also what is the pressure supposed to be at
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1995' 383 LT4 8:1 static. on 16psi ATI blower. custom exhaust and custom Y-pipe. 3500 TCI stall. Custom built 4l80 with Brake and manual VB done by me. full suspension. complete Aeromotive fuel setup with Racetronix 79# injectors. Moser 9 inch. custom Nitro shaft with forged yokes. 8 pt cage. AC delete. 17x9 front ZR1, 17x11 Rear ZR1 rims. rear tires currently V710 but going to Hoosier DR's. wideband setup. complete autometer gauge monitoring setup
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Old 05-14-2007, 05:10 AM   #7
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Fuel pressure should be around 38-39 at idle. Unplug the vacuum line on the FPR to simulate WOT and pressure should jump about 4 psi.
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Old 05-14-2007, 10:41 AM   #8
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If the FPR was bad, you'd probably see improper fuel pressure. Also, you may have a fuel leak at the FPR.
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Old 05-15-2007, 12:12 AM   #9
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my check engine light went on and i ran a check on that. and says the left bank o2 sensor is faulty or some BS. and right bank 02 low voltage. could that deal with the hard starts. i know thats definately a factor of gas milage and richness.
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1995' 383 LT4 8:1 static. on 16psi ATI blower. custom exhaust and custom Y-pipe. 3500 TCI stall. Custom built 4l80 with Brake and manual VB done by me. full suspension. complete Aeromotive fuel setup with Racetronix 79# injectors. Moser 9 inch. custom Nitro shaft with forged yokes. 8 pt cage. AC delete. 17x9 front ZR1, 17x11 Rear ZR1 rims. rear tires currently V710 but going to Hoosier DR's. wideband setup. complete autometer gauge monitoring setup
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Old 05-15-2007, 05:56 AM   #10
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When you put the gauge on it to check the pressure, turn the engine off and see how long it takes to lose pressure. It should take ~30 minutes to drop IIRC. If you have a leak, you will see it start to drop almost immediately.
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