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570s miss-firing and just not working correctly

2345 Views 26 Replies 11 Participants Last post by  Fiona
Hi, there guys, new to the McLaren life, bought a McLaren 570s from a private guy, and the next day I start it it starts running terribly.

Maybe one of you guys has had a similar problem/problem and I would appreciate some help.

Mclaren 570S 2016 55,000KM (34k miles)
The car misfires in cylinders 1;2;3;4 so only one side, I have cleaned the fuel injectors and replaced the spark plugs as well as I switched the ignition coils from one side to the other side, same with sensors and throttle bodies, it got a bit better but still.
The car basically barely goes up to 4k RPMs, and then after that works as it needs to, but not every time, I was thinking it might be the throttle body not opening correctly but not sure how to check them.
As well as the fuel ratio I feel like is off as it spits flames out of the right side exhaust.
When the car is cold it acts fine, at the moment it warms up when I stop it just dies on me, i was thinking maybe it might be the DLD but as i reaserched moreabout that i don't think it is that, no rattling sound on idle and no misfires on 5;6;7;8.
I have taken it to services around me, and i feel like they are just guessing, what and how, as each of the 6 services told me a different thing. Starting with removing the engine, to changing the battery to changing the gearbox...., for me it sounds absurd.
Any tips would help. Keen on fixing it myself as non of my past supercar mechanics do mclarens 馃槗
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Have you tried switching the MAFs over?
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Could be a cam phaser on one block has gone bad and its causing your timing to go to shit, i think i saw somewhere that you can use a stethoscope to listen to the cam cover and hear the different clicks between the good side and the bad.

If that is the problem then at least you find out your fix, if not you can just pretend you're a doctor in a cheap xxx movie with your cheap stethoscope from amazon
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Have you tried switching the MAFs over?
yes sir, one of the first things I did, nothing really changed unfortunately
Could be a cam phaser on one block has gone bad and its causing your timing to go to shit, i think i saw somewhere that you can use a stethoscope to listen to the cam cover and hear the different clicks between the good side and the bad.

If that is the problem then at least you find out your fix, if not you can just pretend you're a doctor in a cheap xxx movie with your cheap stethoscope from amazon
Okay, will try, is it hard to change the cam phaser?
Okay, will try, is it hard to change the cam phaser?
at first i thought about this, but i looked online and the videos just did not have the sound i had.
re:
Cam phasers dont tend to fail on 570's its usually they spin on the camshaft causing the timing to become out of spec hence you will not hear that clicking noise. There is an updated cam phaser bolt. Most of the time you can just reset the timing with the new bolt and old phaser and everything will be back to normal.
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Cam phasers dont tend to fail on 570's its usually they spin on the camshaft causing the timing to become out of spec hence you will not hear that clicking noise. There is an updated cam phaser bolt. Most of the time you can just reset the timing with the new bolt and old phaser and everything will be back to normal.
Maybe you could suggest how that is done?
Just connected a different obd2 reader and got these codes:
P1486 EGRA CIRCUT
P1488 EXAUST MUFFLER Buypass
P0510 CLOSED THROTTLE POSITION SWITCH
P0016 CRANKSHAFT POSITION-CAMSHAFT POSITION CORRELATION- BANK 1 SENSOR A
P0299 Turbo underboost
And then cylider 1-4 misfired detected.
Maybe this would help get to understand the problem.
thanks
You are in Dubai, I am here I can help you. What OBD logger do you have? Is there a way you can check your fuel trims for me please? If you have an OBD logger you are looking to check the LTFT option in whatever software you are using? Would also be useful to let me know what that is too.

I wish people would stop selling cars here that have issues. I had an issue as well and it took my a year to find the problem because you get idiot mechanics here that actually create problems and dont know what they are doing esp in the UAE.

Dont worry its nothing major hopefully and I will diagnose the problem for you and will tell you how to fix it cheap.

To me from the codes that you have provided (which are not Mclaren definitions) the problem is pointing to either a broken throttle body which ive not seen before but I guess it can happen if some mechanic had it off before and broke it or you have a big airleak under the intake manifold/ISG problem... Have a read up on the Official mclaren codes yourself as the scanners do not give you the correct information.. ECU / DME - McLaren Diagnostic Trouble Codes (DTCs) - M-Engineering - Confluence

Do this, buy another bosch throttle body, they are not mclaren specific and are cheap, you can type in the part code into google/amazon/ebay you should be able to find one locally, they are used on many different cars. If it isn't any better Following this, have the inlet manifold off and check the intake underneith for a pipe that can split and leak, sound generator for leaks looks like a plastic bulb I am 99% sure it is a combination, one of or both of these issues.

If you want it fixed properly speak to Brad at Dragon racing at the autodrome and tell him Michael sent you. Hes ex mclaren and knows what hes doing.

Follow my advice and your car will be fixed in no time. If you need any extra help let me know. You're Welcome :)

throttle body link amazon.ae

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You are in Dubai, I am here I can help you.
Send me your details鉂
You are in Dubai, I am here I can help you. What OBD logger do you have? Is there a way you can check your fuel trims for me please? If you have an OBD logger you are looking to check the LTFT option in whatever software you are using? Would also be useful to let me know what that is too.

I wish people would stop selling cars here that have issues. I had an issue as well and it took my a year to find the problem because you get idiot mechanics here that actually create problems and dont know what they are doing esp in the UAE.

Dont worry its nothing major hopefully and I will diagnose the problem for you and will tell you how to fix it cheap.

To me from the codes that you have provided (which are not Mclaren definitions) the problem is pointing to either a broken throttle body which ive not seen before but I guess it can happen if some mechanic had it off before and broke it or you have a big airleak under the intake manifold/ISG problem... Have a read up on the Official mclaren codes yourself as the scanners do not give you the correct information.. ECU / DME - McLaren Diagnostic Trouble Codes (DTCs) - M-Engineering - Confluence

Do this, buy another bosch throttle body, they are not mclaren specific and are cheap, you can type in the part code into google/amazon/ebay you should be able to find one locally, they are used on many different cars. If it isn't any better Following this, have the inlet manifold off and check the intake underneith for a pipe that can split and leak, sound generator for leaks looks like a plastic bulb I am 99% sure it is a combination, one of or both of these issues.

If you want it fixed properly speak to Brad at Dragon racing at the autodrome and tell him Michael sent you. Hes ex mclaren and knows what hes doing.

Follow my advice and your car will be fixed in no time. If you need any extra help let me know. You're Welcome :)

throttle body link amazon.ae

Thank you a lot, i deleted the isg already, will do the throttle body and manifold
You are in Dubai, I am here I can help you. What OBD logger do you have? Is there a way you can check your fuel trims for me please? If you have an OBD logger you are looking to check the LTFT option in whatever software you are using? Would also be useful to let me know what that is too.

I wish people would stop selling cars here that have issues. I had an issue as well and it took my a year to find the problem because you get idiot mechanics here that actually create problems and dont know what they are doing esp in the UAE.

Dont worry its nothing major hopefully and I will diagnose the problem for you and will tell you how to fix it cheap.

To me from the codes that you have provided (which are not Mclaren definitions) the problem is pointing to either a broken throttle body which ive not seen before but I guess it can happen if some mechanic had it off before and broke it or you have a big airleak under the intake manifold/ISG problem... Have a read up on the Official mclaren codes yourself as the scanners do not give you the correct information.. ECU / DME - McLaren Diagnostic Trouble Codes (DTCs) - M-Engineering - Confluence

Do this, buy another bosch throttle body, they are not mclaren specific and are cheap, you can type in the part code into google/amazon/ebay you should be able to find one locally, they are used on many different cars. If it isn't any better Following this, have the inlet manifold off and check the intake underneith for a pipe that can split and leak, sound generator for leaks looks like a plastic bulb I am 99% sure it is a combination, one of or both of these issues.

If you want it fixed properly speak to Brad at Dragon racing at the autodrome and tell him Michael sent you. Hes ex mclaren and knows what hes doing.

Follow my advice and your car will be fixed in no time. If you need any extra help let me know. You're Welcome :)

throttle body link amazon.ae

McMedics Dubai?
Yeah that would be me. Lol.
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of no help whatsoever but did you choose your user name before or after buying a mclaren? probably the most fitting name on this forum.
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Have you tried switching the MAFs over?
The MAFs rarely fail. Never seen it
Silly question, but have you checked your oil level? That's the first question we ask when cam codes are present. 30% of the time it's from very low oil. 50% of the time it is bad phasers, 10% of the time it's a fluke, and 10 % of the time it is wiring.

With the car being sluggish down low and then picking up near 5K RPM I have a hunch your intake cam is not advancing, which in turn sets a fault and disables cam control. From 5.5K RPM and up the Cams are not advanced / retarded much when they're properly functioning so power would be similar unless it was in derate. Here are the OEM Cam Setpoints for the 570S

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Im currently logging the car, a cam phaser could be to blame, but at present it doesnt seem to be that way. Will update all when I have checked logs...

Ive already asked him and yeah oil level is where its meant to be, there are various sensors that are not functioning so I am sorting those first. Its nothing serious and will be tip top in a few days when im done with it.

Thanks @M-Engineering for the cam angle demand table, love seeing all that stuff.
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