running lean fwdp stage 5

[turbovanman²]

Hmmmmmmm, that doesn't make sense, well anyhow, that means the return line isn't the problem, or the pump.

So that leads to a map/sensor problem or the cal mysteriously wigged out. Try turning up the fuel pressure and see if the lean condition goes away.

[spiro440]

I will try the new filter tomorrow when I get it. If that doesn't help I will go through all the hoses again once more and if all fails, turn up the pressure.

Would the cal. fry if one of the plugs wasn't working properly.?

[black86glhs]

I'm wondering about the O2 sensor also. Try another one if the filter doesn't do it.

[spiro440]

Hope I have one somewhere and also going to try another MAP.
I will keep you posted.

[turbovanman²]

Sounds good on the filter.

Plugs being bad taking out a computer, haven't heard of that one yet unless the wire falls on the wiring and sends current to it, lol.

Oxygen sensor is ignored at WOT so that shouldn't affect it, especially considering its ok not at WOT.

[spiro440]

I have a feeling that the map is off it's calibration. Everything seems fine until I floor it. The computer seems to want to bring the a/f down but stops at 13.6.
I always thought that it's either good or bad. But now I'm wondering if it's just off if that's possible. I'm I overthinking this??
I would go for the map before the 02.

[bakes]

I have seen oil get pushed into the the Tps sensor and do wierd things .
do you have a spare 3 bar map to swap in ?

[Force Fed Mopar]

Are you running a MBC?

[spiro440]

I have seen oil get pushed into the the Tps sensor and do wierd things .
do you have a spare 3 bar map to swap in ?

No spare 3 bar map unfortunatly, going to have to purchase one, I will look for a tps.
Thanks

Are you running a MBC?

No, just what the computer gives me. Being weak and boost is addictive, I would probably turn the MBC up. The less control I have over boost the better!! LOL!!!!

[glhs727]

do you have a scan tool? take the car out and check both tps and map voltage.... if one is out of it's range, change the sensor.

[shelbymonster]

can a fuel pump can give good pressure and not enough volume ? i beleave so , after doing some track time i would beleave that all the loose stuff in the tank may have pass the fuel sock and clogered the fuel filter ...

[Juggy]

can a fuel pump can give good pressure and not enough volume ? i beleave so , after doing some track time i would beleave that all the loose stuff in the tank may have pass the fuel sock and clogered the fuel filter ...

thats what happened to my car. it ruined a complete season of racing trying to decipher the problem. 12.0@115 on 40psi fuel pressure 20 psi boost 5-6 months straight....oopsy.

[Force Fed Mopar]

No spare 3 bar map unfortunatly, going to have to purchase one, I will look for a tps.
Thanks


No, just what the computer gives me. Being weak and boost is addictive, I would probably turn the MBC up. The less control I have over boost the better!! LOL!!!!

Maybe the wastegate or baro solenoid is stuck open and causing a leak.

[ol"blue]

Wow please keep up the info i am having the exact same problem no stage 5 but same stuff,very strange will post back what i find.

[spiro440]

Had time to work on it today.
I got a new map sensor and did not help. (100$ for spare parts) and swap another TPS sensor.
I plugged a DRB II and got the readings from the map which idicates 11.6 in.hg and 12.5 at WOT full boost. My gauge shows 17in.hg and 18 psi. I'ts my first time using a drb II, pretty cool tool!
I also plugged my gauge directly in the same line as the map and the values where the same 11.6 at map and 17 on gauge. I guess the computer is not reading the inputs correctly, It seems to be off by 6. The O2 sesonr goes rich at full throttle, the TPS indicates 3.69v. That seems to be working fine.
I don't want to turn up the fuel pressure as that would be ignoring a problem.
Now where do I go from here??

[4 l-bodies]

Spiro,
3.69 volts seems sorta low to me for WOT. I think it trips high code @ 4.7 volts. I would double check TPS input voltage (should be 5.0 volts) and check DRB with key on engine off and see if it is telling you TPS is at 100% @WOT. I believe it gives you a voltage and percentage correct?
Beginning to sound like ECU went bad. Is this still a LM vehicle? I still would crank up fuel pressure temporarily to see if A/F comes back down. Certainly not going to hurt anything doing that.
Todd

[spiro440]

I'm new with the drbII. Only been using it for 30 minutes!!
I've got 88 electronics. I will see what else I can get as info and report back.

[spiro440]

TPS indicates 100% at WOT. I swap computers to see if the map would give me the same values. No change 11.8in.hg from the map and 17 on my gauge. I blocked the baro, no change. I turned up the fuel pressure to 54 psi and the car runs at 11.6 to 12.3 on the wideband. The car boosts 20psi and then drops a little. About 2psi more than usual. The cal is set at 18psi.
The map reads around 12.5psi at full boost. The car runs okay but does not seem to haul like before. I had a run in with an Sub Sti and a CSRT-4 on the highway. Didn't pull away like I used to, even with 2psi more. Anobody have other ideas?? Why is the map reading lower?

I will change the fuel filter tomorrow.

[shackwrrr]

TPS indicates 100% at WOT. I swap computers to see if the map would give me the same values. No change 11.8in.hg from the map and 17 on my gauge. I blocked the baro, no change. I turned up the fuel pressure to 54 psi and the car runs at 11.6 to 12.3 on the wideband. The car boosts 20psi and then drops a little. About 2psi more than usual. The cal is set at 18psi.
The map reads around 12.5psi at full boost. The car runs okay but does not seem to haul like before. I had a run in with an Sub Sti and a CSRT-4 on the highway. Didn't pull away like I used to, even with 2psi more. Anobody have other ideas?? Why is the map reading lower?

I will change the fuel filter tomorrow.

The drb automatically assumes that you have a 2 bar map, so the voltage that a 3bar puts out at 20 psi is the same as 12.5 psi on the 2 bar.

[spiro440]

Thanks,
That's good to know. Makes me feel better. I guess that should not affect the fuel and spark curve. Still doesn't explain why I'm running lean.
Any other test I can run? I'm still stumped!
I will change the fuel filter and see if I'm lucky.