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running way lean

1126 Views 16 Replies 7 Participants Last post by  sleeping6spd
just put in a air/fuel ratio gauge to discover i'm running extremely lean, only mod is a short ram. anyone have any ideas as to how i can correct this. i'd like to avoid buying new injectors if possible. thanks
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Discussion Starter · #6 ·
ok well my gauge starts at red=lean yellow=ideal blue=rich from left to right. when i drive it starts and red and maybe lights up a bit of the 2nd red bar. if i open it up it starts to hit orange around 5 or 6k rpm but its still a good ways from being at ideal. i did run some injector cleaner but all that did was kill my o2 sensor. i'm wondering if it mite b a bad fuel filter?
 

· The Librarian
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1) Do you have an aftermarket tune?
If so, have you gotten an update to compensate for the short ram?

2) If you don't have a tune:
Did you disconnect the negative cable from the battery to reset the ECU after you installed the short ram?

I've never heard of fuel injector cleaner killing an O2 sensor. [dunno]

I hate to say it, but a narrow band A/F gauge at best will provide a decent light show.
It's really not the diagnostic tool that a wide band unit would be.
 

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sleeping6spd said:
i think it is running lean, because when i start from a stop it needs to be up around 2 to 3 k rpms to move and it idles a little rough
That sounds more like your exhaust is clogged to me. If the engine was running too lean then you'd be hearing popping noises from the exhaust at idle.
 

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I had a lean code.

replaced:
02 sensors
welded hole in egr tube
ran injector cleaner through
new injector o-rings
fuel filter


Ended up being the plugs weren't gapped. Previous owner didn't know you have to gap autolites. [rolleyes]

My exhaust never made "popping" noises.
 

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Discussion Starter · #11 ·
i think my plugs are alright although i'll check them again, my exhaust does make a "popping" although not so much at idle, more like if it is reved and allowed to return to idle it makes a low "popping" as the rpms drop, i think i will need new exhaust either way whether it helps my air/fuel ratio or not
 

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No it couldn't.

It's your gauge, it's worthless. Narrow band O2 gauges are NOT to be treated as accurate diagnostic tools. In fact they're not to be treated as anything other than blinky lights.

A wide band O2 setup with EGR is about the only way that you could ACCURATELY gauge what A/F ratio your car is running.
 
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