Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

Acura TSX k24 a3, positive short and long trim fuel value

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5 years 1 month ago #27031 by raresvintea
Hello. I am in europe, and i have a honda accord cl9 k24a3 that is very similar with acura tsx 1st gen in USA.
My car is fitted with LPG and from the begging its has positive stft and ltft
On idle short was 11.7 and long was 9.4
On 2600 rpm short 7.8 and log 7.8
On 4000 rpm short 4.7 and long 7.8

Sometimes on LPG it gaved me p0171 and i have dissabled the system
I have replaced
-pcv valve
-exhaust manifold donut, it's before o2 sensor
-o2 sensor with brand new
-fuel filter from the tank and check fuel pressure 3.6 bar(normal)
-i have check visual intake tube and no cracks
-blocked the vacuum tube that goes to front mount engine support
-block vacuum pipes to brake booster and evap system.

Checked for vacuum leaks with brake cleaner spray and no leak found

I want some suggestions. Car has fully electronic throttle body.

What i'm thinking
-maybe the butterfly from throttle body isn't sealing, but on HDS(honda diag scanner) it shows at idle 10-14% throttle position. maybe to reseal with special spray?\
-any suggestions please

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5 years 1 month ago #27039 by chief eaglebear
Ok so sometimes it's throwing a po171 intermittent po171 eh mate let's get to the problem here huaahhh is that a lean condition intermittent hmmmmm any other codes in other modules and are we sure no vacuum leaks I think sometimes we have to smoke exhaust and intake to rule out any vacuum leaks let's narrow these symptoms down a little I'ma beginner so be gentle lol

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5 years 1 month ago #27040 by raresvintea
i will try to find a service that i can smoke test the system.
There are no error codes present, just higher short and long trim.

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