I was coming into work this afternoon and all was good, pulled up at the lights and noticed the idle drop and the car nearly died but then the revs shot up and then it evened out. Pulled off and it felt fine so I gave it a little juice. The car gets up to 5 psi easy enough and then crawls up to 7 which I believe is safety boost. There is no smoke or anything but it does feel a bit lumpy once it gets above 5 psi. :cry: The idle is now also jumping about a little for a few seconds and then evening out.

 

This morning it seemed fine and I drove about forty miles with no problems.

 

I will be looking to see if theres any error codes when I get home but was just wandering if there was anything else I could check while I'm at it.

 

Cheers

try unplugging the AFM to see if that changes anything

 

try unplugging each coilpack to see if the engine dies a little then plug each one back in and do all six to see if its running on 5 etc

 

try unplugging the o2 sensors to see if one of these is lazy or knackered.

 

could be a boost leak so tighten up all the pipes or get a leak tester

 

erm

 

could be the temp sensor on the top rad pipe as these are prone to going

 

lastlybe worth trying someone elses PTU to see if yours is not working right

 

my money is on either a temp or o2 sensor ;)

 

well worth getting someone to run a conzult on it which would show up whats wrong :)

 

Mike

Error codes is first obviously.

 

Could check for boost leaks, water temp sensor and coil pack connectors as well though ...

Cheers both. I will be checking the error codes as soon as I get back but if that show up zilch then it's good too know what else I can look at.

 

Couple of questions though??

 

Whats the AFM?? can you tell me whereabouts the O2 sensors are?? and lastly, sorry fairly new to the 300, I take it your on about the temp sensor for the ECU??

 

Cheers for the uick replies!!

Sounds like it 'could' be the throttle position sensor. I had something similar like that happen to mine recently. Ran the code off, checked the wiring and found a loose wire. All sorted now.

Right I have just been looking at the car and it's flashing code 55, I also did the engine light test for the O2 sensors and these seemed fine too. Does anyone know if this is a good test or am I better off disconnecting them??

 

It is smelling of petrol a bit too so I checked for leaks and there were none. Don't know if this maybe something to do with it.

 

I am going to get the car up in the air tomorrow to check all of the pipes going to the turbos, if I follow all pipes coming from the turbos will that be it?? Never had a turbo'd motor before so I'm not really sure :confused:

 

It was also said the temp sensor may have something to do with it, is there anyway to test it??

 

Lastly if all else fails does anyone know where may be the best place to take it to get a conzult onit?? I'm in the Farnborough, North hampshire area.

 

Apologies for all the questions but I'm really not well versed on the 300 yet :cry:

It's smelling really strongly of petrol out of the exhaust too, could that point to the O2 sensors??? Any help would be appreciated :bow: