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| Forum name | Turbo/Nitrous Tech |
| Topic subject | car running leaner then normal but egt is ok |
| Topic URL | https://forums.2gnt.com/dcboard.php?az=show_topic&forum=i8&topic_id=20825 |
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20825, car running leaner then normal but egt is ok Posted by pn0ymahal, Apr-28-02 04:37 PM well after my crane hi-6di2 install my air/fuel gauge is not giving my as rich of a reading as before... at wot .87-.91v max with the ignition on sometimes it will just be in the 70s moving around or jumping everywhere... this is up to 6psi of boost fuel is about 85-90psi at 6psi egt is 1500-1550max at 6psi... well today i put my ignition to stock and at 1st run to 6psi ran stoich to rich a little .85-.94v jumping around... next run had enough fuel 85-90psi at 6psi egt went up to almost 1600 this was from a dead stop... then run i just step on the gas half way going slower .91-.94v... next run fuel 85-90psi at 6psi egt 1500max a/f .92 going down to .91-.90v then .87v?? what gives??... this is happening without the ignition in ....i have both the blinky light modified air/fuel and digital air/fuel...its weird how this happens right after i install my ignition before it was .92-.96v no matter what egt 1400-1500max fuel 85psi at 6psi of boost... on a side note im auto and when i let off the throttle pushing it i get a higher air/fuel reading like before i let off ..87v then i let off goes to .92v for example...?? could my gauges have gone bad? | |
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20826, RE: car running leaner then normal but egt is ok Posted by pn0ymahal, Apr-29-02 10:05 AM anyone? | |
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20827, RE: car running leaner then normal but egt is ok Posted by aj, Apr-29-02 03:12 PM What plugs were you using?Might need to step down one heat range.BTW, I had problems w/ both those gauges hooked up.I took one of em off and it was fine after that. | |
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20828, RE: car running leaner then normal but egt is ok Posted by pn0ymahal, Apr-29-02 05:01 PM the a/f wire is white with black stripe or other way around? i forgot since i installed it with the turbo... so i dont see a reason for it to mess my a/f up now since both of them gave me a accurate reading on both gauges etc?? this all happen after i disconnected the battary to install my ignition weird.... | |
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20829, RE: car running leaner then normal but egt is ok Posted by Avenger EST, Apr-30-02 04:56 AM read my website. It might help you decipher what is going on in yoru situation. | |
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20830, new info on a/f prob might help? Posted by pn0ymahal, Apr-30-02 06:41 AM i will check out your site.. the info i need is under tech right? | |
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20831, RE: new info on a/f prob might help? Posted by Corbin, Apr-30-02 11:57 AM One note: | |
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20832, RE: new info on a/f prob might help? Posted by pn0ymahal, Apr-30-02 02:09 PM well i removed the a/f light wire from the ecu still the same thing... i took it for a drive by myself again with the ob2 program etc... i notice anything 2psi of boost and below my a/f will be rich .91-.95v going up slowly.. if i go to 6psi it will start to drop down slowly.95-.88v mostly .90v... i did about 11-12 runs down a long street back and fourth going into all gears with overdrive in up to 120mph fuel is a bit high 87-90psi sometimes it would flicker very fast at that point then get steady is this ok?, and egt most of the time up to 1500-1550max once it went close to 1600 but that was all... i notice comparing a/f readings on my digital a/f and labtop that on the labtop bank 1 short one, it was mostly at the same exact reading as my digital gauge, but sometimes it would range from 1v max but sometimes up to 2-3v differ?? i notice a couple runs when my digital a/f gauge hit .88-.89v my labtop only said, .90v never below?? which is more accurate? i also notice the 1st a/f to the 2nd a/f on my labtop differed about 3v about is this right?...i got my static at 60psi 3.62 disk hard spring dark colored no bleed valve now vacuum screw in clockwise and my idle fp is 50psi, but i also notice when i got home it was at 55psi at idle? i rev the car and it went down to 50psi? and my fuel pump is not as loud as before when i was running rich .93v+ but you can hear it a bit from the outside not inside anymore?... im not sure whatelse to do...car runs hard ... im so lost now... i dont know whatelse to check or do.. Corbin want to come help me im in so cal? hehe =)ill pay for your ticket =) | |
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20833, RE: new info on a/f prob might help? Posted by pn0ymahal, May-01-02 07:26 AM today driving my a/f never went to rich at wot mostly just moving around... would this mean its not going into open loop mode? im lost | |
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20834, RE: new info on a/f prob might help? Posted by Corbin, May-01-02 11:16 AM Are you sure that both fuel pumps are operating reliably? Is the boost screw on the S-FMU fully closed? I just don't remember my fuel pressures flickering with the S-FMU. I really wish I could help out, there should be someone local that can help. Sounds like the digital A/F is working right. I wouldn't expect the digital meter to exactly match the datalogger, but they should be similar. | |
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20835, RE: new info on a/f prob might help? Posted by pn0ymahal, May-01-02 03:12 PM i have the boost screw all the way in ( clockwise ) and same for vacuum port... i just put a new fron o2 sensor samething... i notice at idle my fuel pressure was moving a bit got me worried for a second... i can hear my hrc pump each time i start and at idle, what should i check out or how should i? since i get about 85-95psi of fuel at 6psi i would have to run rich, not leaner right?.... i think i will have to call someone ....=) | |
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20836, RE: car running leaner then normal but egt is ok Posted by toykilla, May-01-02 03:39 PM could my gauges have | |
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20837, solder the wires back to stock Posted by pn0ymahal, May-02-02 07:05 AM im going to solder the wires back to stock and see what happens so far i got no clue what to do... all i can say is that my compression is nice =) | |
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20838, RE: solder the wires back to stock Posted by pn0ymahal, May-02-02 12:09 PM i put it all back.. crap samething... i guess im out of luck.. i will just put the dang injecs in soon i hope and if i dont run rich there is something wrong with a sensor? | |
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20839, found one prob but not it Posted by pn0ymahal, May-03-02 04:41 PM well i took a look at the wires i could see from the ecu going down... the wire was sorta strip or cut you can say and when i pulled it just came loose from the bottom whereever that leads to? where does it let to etc? i solder those wires back and my o2 sensor bank 1 curve is good now ... the sensor 2 is still at the bottom chillin like i believe its sopose to at idle... the car does feel a bit of hesitation once in boost..its funny i step on the gas slowly goes up to .93-.95 up to 2psi of boost then i floor it it drops to .87-.90v going up to 5-6psi it has a hard time then and let go a bit on the gas but hold it then my a/f goes back up slowly...hehe egt still seems fine 1400-1500 fuel around 90 at 6psi, but sometimes my pump is loud sometimes its like not there at idle... | |
