[mike1967]

pinging or pinking, maybe anti knock sensor has not been plugged back it sits on front of block behind the super charger, if tooth out the idle would be bad plug it in with scanner i done one last week top end rebuild with a high lift cam shaft, that when first started and driven was a like that, so i plugged it in with autocom cdp plus and that allows me to reset the adaptation on the gen 1 cooper s cars after it behaved fine again, it going on rollers next week see what can be got from it

 

[mike1967]

the timing chains on gen 1 mini is very easy to set up cant see how anyone could get it wrong,, you have 3 links coloured and two side by side arrow marks on bottom sprocket and one mark on top sprocket really is a no brainer ant tech would totally not get that wrong its so in your face as such, unlike the gen 2 r56 princes engine they are easy to get wrong, the knock sensor multi plug is bolted to one of the bolts around inlet and ss i know i always unplug them to avoid damage,, but would deffo give a code if not connected,,
its common after head gasket failure for the 02 sensor to get damaged also the cat as well, its also common the badly running engine before the ecu learns the setting of the adaptations and good idea to reset them like said before how to, i done one last week and fitted a high lift newman camshaft in it and until i reset the ecu it ran all lumpy and would not pick up right, after reset then a hour long run through the rev band its back better than right again,

 

[mike1967]

the 02 sensor will take a few runs to work right with ecu ie reset adaptions or maybe 4 times hot to cold and use all rev band as such,
its not easy to skip a tooth as oil pump/timing cover has a lip on it for bottom sprocket unless its been worn away from past use with tensioner fault maybe.

 

[mike1967]

if head gasket was wrong you would have all kinds of water cooling and oil issues etc, if water level stays right and oil dont turn chocolate colour its prob fine, could do a compression test see if any are low if get two next to each other its poss that could leak between,, the head bolts on them are stretch bolts 20nm then 40nm then plus 90 degrees. maybe divertor valve playing up above the throttle body,, worth doing live data run see if 02 sensor when hot runs around the 0.45v mark

 

[mike1967]

I did have a faulty bypass valve but replacement upgrade from 132* min* and wouldn't explain pre det. Will leave back to mechanic and find out I guess.

i would get him when its cold reset all adaptions for throttle control valve and 02 sensor etc then start from cold leave on idle until around 80c then take for a drive at 2000 revs then after a few miles increase it to 3k then 4 k then a couple to the top so ecu can work out where it need to be with learnings then park it up let go cold then repeat this will give it a controlled level to work it self out see what you have at end of it, has car been mapped when smaller pulley fitted was it on rolling road if so if might need another un to tweak it,

 

[mike1967]

Yes 14% , cat back, stealth cai, 380cc injections, ngk iridium 7, big intercooler. I have reset adaptions made no difference.
Leaving it back with him on Friday

its common for if car had head gasket issues to destroy the 02 sensor, its also common if valve seals were gone that oil does same trick, just done a 52 reg one stem seals were so bad and head gasket failed including throwing oil in the water now back together its got a feeling like its holding back when really pushed so decat next job and 02 sensor, anti freeze kills the 02 sensors for a past time, and oil will as well.

 

[mike1967]

now uses no oil we also think that the lack of extra oil to burn off can lower the out put a tad on top

 

[mike1967]

Thanks all but no codes both o2 sensors and catalyst issues throw fault codes but I have changed o2 to be sure, No coolant in oil and no oil in coolant also not burning any oil.

done one a while ago it was at 100k burning oil like hell due to exhaust valve stem seals worn out after this was all done and no longer burning oil,, little tip when anyone fits new valve stem seals fit them with a light film of seal link below is thin stuff can beat it for this sort of job,

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after doing that coat the valves and the new rubber seals with a mixture of engine oil and wyns engine treatment ie this leaks a stick coating on all engine parts when go back together

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so after rebuilding it we found it had partially blocked the cat also found when cold the car would go very well as soon ad got to near 80c was holding back feeling,, decat'd it mapped it out car goes well again, this car had traces of block weld or rad weld over the years could tell it had not had antifreeze in it for a long time as the insides of block were rusty,, i treated this with rust cure solution and when back together was flushed out and then a strong does of antifreeze added, they all seem to do the stem seals and use oil and the age is not on their side, makers of the cats and 02 sensor say 60-120k miles but gen one cars now are getting very old and rubber parts like stem seals leak and cause all kinds n the exhaust

 

[mike1967]

things that damage 02 sensors,,, oil burning ie most times valve stem seals,, this contaminates the 02 sensors ie replace with new is best option and reset the adaptations for them as well,, also head gasket failure where coolant and anti freeze kills them off, also the life span for a 02 sensor 60.000 miles is what Bosch say is about the life span and the sensors and cat should be treated as one system,, pull the upstream 02 sensor after a good hard run and see waht colour it is on oil burners they are bright white as semi blocked cat holds the heat in the precat area and the oil gets burnt off and leaves a white residue, i had a r53 that 100k needed head off and new valve stem seals put it back together and ran it and found as i expected when car was cold and not in closed loop running with 02 sensors and cat it went very well ie 1 to 2 to 3rd gear in dry traction light on wheel spin its also had a high lift cam and some other stuff done its going on rollers next week to be set up,, anyway when car got hot the car got slower holding back it was leaning out,, since decat and two new 02 sensors its as fast cold as hot some pics of head off and finished i also etc prime and coat super charger and intercooler so deals with heat as best as it can,,, notice the black build up from oil burning the cat was ruined from it as well

 

[mike1967]

Only symptoms are engine pinging and every now and again the revs bog at idle then catch. I am thinking the mechanic has skipped a timing tooth. But looking for advice.

trouble with the could of set timing out by a tooth its sort of one of those jobs that only a total plum could get it wrong just no real area for error its in your face the marks, 3 coloured chain links two to go two marks on crank pulley and one on cam shaft sprocket, the chain tensioner i have found after market ones are rubbish always fit genuine ones also they take a few miles to settle in, its common for the hard plastic pipes that plug in to inlet manifold under the throttle body to get cracked worth smoke testing the circuit, need to live data it see whats running where ie 02 sensors and see what drops when it does it maybe