Clio 172 ph2 / bikes
Anyone have on thoughts in this one.
Currently my LTFT is stuck at -14. 06% and will not adjust regardless how its driven. Tried the common typical battery disconnect and discharge to no avail, even left it 12 hours.
STFT seems to operate as it should. At warm idle ranging from - 7 to +10, occasionally hits +16 and errring on the positive side, id assume its trying to correct LTFT.
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Story goes. Was experiencing intermittent cold clutch judder both on open and closed loop, clutch is about a year old valeo item and doubt its done 10k nor is it treated hard, noticed LTFT was down to - 20 to - 30 odd and adjusting itself a bit, diagnosed a lazy cheap chinese s1 lambda, replaced it with a known working 2nd hand twingo rs sensor, turns out its the same sensor with a different plug so spliced the old plug on. Car ran well for a day and then stft got erratic and ltft settled at -14.06. Began to clutch judder hot and cold more often. Discovered the whole bosch lambda sensors take a sample air reference through the cable thing and you cant solder or crimp them... Yup beathing cable... Sounds mental but its supported in the bosch literature. So ive since replaced the lambda with a new bosch one, genuine of course. Stft came into range albeit nearer positive side of spec, suspect its trying to correct the stuck high negative ltft. Replaced the chinese tdc sensor, car ran better but still same issues, replaced spark plugs as they werent the reccomended ngk ones. Other than a little bit of occasional clutch judder when cold the cars running strong.
Quite content with the readings im getting from the sensors, ive tried spare map, intake temp and coolant temp sensors just for arguments sake.
Spark plugs when i changed them showed to be slightly rich, even across all 4.
Warm compression test showed near 190psi across all 4
1 injector was an ohm low, wasnt concerned but replaced it with a spare. Spray looks good across the 4 however i Havent flow tested them.
02s1 pre cat is new and operating in range
02s2 post cat is pegged at - 100, think its dead but apperently they only control the eml light. No immediate reason for concern.
No exhaust leaks before precat lambda.
Only code thrown is for a slow heater in 02s2.
Had it going on 4 years, Its an 02' 172, 155k on the clocks,
Ported inlet manifold, ktec induction kit with new ramair filter, 182 exhaust, 2.25 decat to old 2.5 ktec 172 stealth. 98 ron rstuner map. Carbon canister removed. Cup ac delete setup, 20k since new dephaser and timing done. Heap of other things but not relevant to issue. No recent work prior to clutch judder issue. Only run on super and its not down to bad or e10 fuel.
The inconsistency of the intermittent judder issue suggests its fuelling related rather than mechanical to me. Cant feel ignition or fuel breakup throughout the rev range, its sharp, punchy and strong.
Next steps as i Cant test fuel pressure on the 172/182 easily is to be replace the fuel pump as its presumably done 155k and all 4 plugs read rich, meaning its not indicating a specific injector or ignition issue, then a throttle body.
Id just like to get the ltft cleared to see if it will start behaving itself to get a clearer picture of whats happening before wasting money blindly.
Using car scanner on android, a scannex obd2 adapter, im not trained on reading data but a have good understanding.
Open to suggestions but any info on clearing a stuck ltft would be massively appreciated.
Currently my LTFT is stuck at -14. 06% and will not adjust regardless how its driven. Tried the common typical battery disconnect and discharge to no avail, even left it 12 hours.
STFT seems to operate as it should. At warm idle ranging from - 7 to +10, occasionally hits +16 and errring on the positive side, id assume its trying to correct LTFT.
----
Story goes. Was experiencing intermittent cold clutch judder both on open and closed loop, clutch is about a year old valeo item and doubt its done 10k nor is it treated hard, noticed LTFT was down to - 20 to - 30 odd and adjusting itself a bit, diagnosed a lazy cheap chinese s1 lambda, replaced it with a known working 2nd hand twingo rs sensor, turns out its the same sensor with a different plug so spliced the old plug on. Car ran well for a day and then stft got erratic and ltft settled at -14.06. Began to clutch judder hot and cold more often. Discovered the whole bosch lambda sensors take a sample air reference through the cable thing and you cant solder or crimp them... Yup beathing cable... Sounds mental but its supported in the bosch literature. So ive since replaced the lambda with a new bosch one, genuine of course. Stft came into range albeit nearer positive side of spec, suspect its trying to correct the stuck high negative ltft. Replaced the chinese tdc sensor, car ran better but still same issues, replaced spark plugs as they werent the reccomended ngk ones. Other than a little bit of occasional clutch judder when cold the cars running strong.
Quite content with the readings im getting from the sensors, ive tried spare map, intake temp and coolant temp sensors just for arguments sake.
Spark plugs when i changed them showed to be slightly rich, even across all 4.
Warm compression test showed near 190psi across all 4
1 injector was an ohm low, wasnt concerned but replaced it with a spare. Spray looks good across the 4 however i Havent flow tested them.
02s1 pre cat is new and operating in range
02s2 post cat is pegged at - 100, think its dead but apperently they only control the eml light. No immediate reason for concern.
No exhaust leaks before precat lambda.
Only code thrown is for a slow heater in 02s2.
Had it going on 4 years, Its an 02' 172, 155k on the clocks,
Ported inlet manifold, ktec induction kit with new ramair filter, 182 exhaust, 2.25 decat to old 2.5 ktec 172 stealth. 98 ron rstuner map. Carbon canister removed. Cup ac delete setup, 20k since new dephaser and timing done. Heap of other things but not relevant to issue. No recent work prior to clutch judder issue. Only run on super and its not down to bad or e10 fuel.
The inconsistency of the intermittent judder issue suggests its fuelling related rather than mechanical to me. Cant feel ignition or fuel breakup throughout the rev range, its sharp, punchy and strong.
Next steps as i Cant test fuel pressure on the 172/182 easily is to be replace the fuel pump as its presumably done 155k and all 4 plugs read rich, meaning its not indicating a specific injector or ignition issue, then a throttle body.
Id just like to get the ltft cleared to see if it will start behaving itself to get a clearer picture of whats happening before wasting money blindly.
Using car scanner on android, a scannex obd2 adapter, im not trained on reading data but a have good understanding.
Open to suggestions but any info on clearing a stuck ltft would be massively appreciated.
