lean all the time

[dcjackson22]

my laser is lean all the time and i need to figure it out. I have maff translator, walboro 255, regulator, fuel pressure gauge, 680cc injectors, ets street strip fmic, evo gt manifold, big 16g, tial gate, 3inch exhaust, aem wide band. i have tryed adjusting everything, tps , timing fuel pressure. also it it runs lean whether your runnig 20 psi or 9 psi, and the wide band can say 10.0 and the plugs are still white.

 

[Twistaye]

And who hooked up your wideband? Sounds like you calibrated it wrong if it reads constant 10.0, it should fluctuate and on deceleration should ping up around 20.0. At idle it should read 14.6. I would check to make sure whoever hooked up your wideband did it correctly, and if it's all wired up correctly I would try and re-calibrate the sensor, if that doesn't work change the wideband's o2 sensor. If it doesn't read anything but 10.0 it definately sounds like that's what the problem is. Good luck

 

[slow4g6392tsi]

Definitely sounds like a wideband problem. But if your afpr is working properly shouldn't it have the same af ratio at 20psi as it did 9psi? But still, I am saying wideband problem.

 

[steve]

my laser is lean all the time and i need to figure it out. it runs lean whether your runnig 20 psi or 9 psi, and the wide band can say 10.0 and the plugs are still white.

How do you know it's lean?

A 10.0:1 AFR is rich. Not as rich as the factory programmed (9.5:1 at WOT) but your wideband may not be able to read that rich. Many can't read any richer than 10:1.

White plugs are not 100% a sign of running lean, just hot. Which heat range plug are you using?

Knowing where your getting the critical data will help.

 

[PIMking]

+1

I pulled my plugs the other day and they were white. ngk 6's (its a hotter plug) and im using 118 octane the weekend before at the track.

 

[dcjackson22]

The wide band does change at all rpm ranges, but at wot whether i have 9psi or 20 and translator all the way jacked up it still does not get black or brown. I can have translator turned up so high the motor bogs down and its still white. Also i am running bpr8es

 

[dcjackson22]

I put in bpr9es and no change, fuel pressure advances to 60psi under boost is that enough, its a b&m regulator modifier.

 

[steve]

Assuming a 1G base fuel pressure of 36.3 psi and 20 psi boost you should see 56.3 psi fuel pressure at 20 psi. However a B&M isn't really a AFPR, it just lets you turn up the fuel pressure on a stock regulator.

BPR7ES should be cold enough for a B16G at 20 psi. What does your wideband read at idle?

 

[dcjackson22]

Wide band reads 14.3 to 14.8 at idle, at normal operating temp. So if b@m is not afpr, is having this on my car the problem.

 

[dcjackson22]

Well I talked to someone at pte and they said that it sounds like combustion temps are to high, and did not give any advice on how to lower that. Anyone have any idea?

 

[steve]

That's one of the things the EGR does.

Based on what your telling us, your not running lean. Your likely running the normal factory AFR of 9.5:1 @ WOT which is richer than your wideband will display. Throwing more fuel at it isn't going to help.

Unless your seeing flecks of metal from detonation on the plugs I'd put some 7ES's back in.
Calibrate your WB and start leaning the car out until it starts registering on the WB @ WOT rather than pinning at max rich. watch your timing and knock counts. Most people target 11.5:1 for tuning but you should work up on that just in case.

 

[dcjackson22]

Yeah already tried that, and their is no egr on the car. I have tried every possible tune with afc and translator, also wide band recalibrates every time i start the car. Also have already exploded a motor about a month ago, This car is getting exspensive and this lean condition has to go, and i have no where els to turn nobody knows at this point.

 

[dcjackson22]

My friends and I have come too a possible solution. I am going to get a turbo thats bigger than the big 16g. We think the a.r size of the hot side is making to much back pressure in the manifold make for alot of heat transfer. so i want to do an hx35 highbrid. any comments?

 

[dcjackson22]

Over the past couple of weeks I have tried a few things. Starting a 2g maff, I thought thier might be a problem with translator so I put a 2g maff in and that did not help still lean, but i know tranlator is alright. Then I took the snapon scanner home from work and pluged and found out the o2 sensor had throne a code so i replaced that and it changed the tune, so i retuned and thought it was fine till i pulled the plug still white. So i also tried a new etc sensor I thought the temp could be to high, becouse acording to the scaner it said it was runnig at 225, needles to say it did not help nothing does, even tried diffrent ecu. anone have any ideas.

Thanks

 

[steve]

anyone have any ideas.

I hate to sound like a broken record.

A 10.0:1 AFR is rich. Not as rich as the factory programmed (9.5:1 at WOT) but your wideband may not be able to read that rich. Many can't read any richer than 10:1 including the UEGO. Based on what your telling us, your not running lean.

White plugs are not 100% a sign of running lean, just hot. Removing the EGR causes the combustion temps to go up.

 

[dcjackson22]

I removed the cat to try to get more flow, and it did not change anything, How am i gonna get these temps down if this is the problem.

Thanks

 

[jking29]

How am i gonna get these temps down

Meth injection?

 

[dcjackson22]

Installed aeromotive a1000, with water filled gauge. Plugs are still white, still hot, also installed 160 degree stat, no help. Fuel pressure acording to the gauge on the regulator is 44 psi, also i had another gauge, I hooked up on the fuel filter, this gauge reads only 30psi, and does not advance, while the other reads 43 psi. What next? im lost...

 

[steve]

Your base fuel pressure should be 36.3. That's with the reference hose off and the hose plugged.
The fuel pressure should track 1:1 manifold pressure when the hose is attached. So it should drop at idle and rise under boost. If your car idles at 18 in hg vacuum that's about -8psi. The resulting fule pressure then should be 36.3 + -8 = 28.3 psi.

If you have a vacuum or pressure source you can power the pump from the check connector and change the reference pressure to see if the AFPR is working. I assume that if the wideband continues to read rich at WOT like it was then the AFPR is tracking. If it wasn't the AFR would drop under boost.

I can't help you as to which gauge is correct.

 

[dcjackson22]

Pte say,s thier injectors are rated 680cc @ 43 lbs of fuel pressure. all gauges are working properly, I have numerous fuel gauges and things seem to be fine with the fuel situation, fuel pressure advances with boost like its supposed to adn wide band reads 10.0 at wot, If fuel pressure did not advance wideband would not read rich. all in all I believe the car has other issuses that are electronic and not fuel at this point. any ideas.
Thanks

 

[PIMking]

Are you using UNLEADED fuels? I know when I used c16 that my plugs turned white and i wasnt running lean.

 

[dcjackson22]

94 unleaded

 

[dcjackson22]

I have decided to part out the car, and put the motor in a 2g i just bought. im done with 1gs forever.