HI guyts

 

a bit of advice needed if possible, as you are aware i have only just bought my 300 so still learning the ropes so to say..today i went to the local petrol station to check my tyres pressures etc, i left the car runnign with no issue whilst i did it but uopn starting to drive home i got a big backfire which scred the crap out of the granny walking her dog and the car just wouldnt go, i managed to splutter my way home luckily and get it on the drive.

however after getting it there it now wont start, it is turning over but doesnt seem to want to fire, ebvery so often the engine management light comes on but goes off too sporadically.

i think i may have a fueling issue but have no idea wher to start..

 

any help will be gratefully appreciated..

obviously im gutted as ive done less than 30 miles since buying it and my trouble has already started...

 

cheers cutty

Mmm...... well it would if a plug fouled stopped sparking filled the chamber with fuel and then managed spark especially if the op was trying to rev the issue away, with any engine running issue diagnosing it with it not in front of you is just a series of suggested checks and overloading the op with tech speak however low level is not always helpful, the most likely culprit is a bad connection spark or fuel related ( temp sensor) or as it often the case a combination of more than one low level fault.

 

Jeff TT

 

He wasn't overloaded with tech speak. Every acronym was explained (CAS, DTC etc) and I even supplied a picture of an engine. My posts later were tongue in cheek, at the end of the day, until DTCs are relayed on here, it's all a bit moot.

Hey guys all help is greatly appreciated, I received some fantastic help so let's not fall out over silly issues, yes some of the abbreviations stumped me but they were then we'll explained or I just googled the abbreviation and found the answer. The pictures were extremely helpful too as was the more simple straightforward advice of not digging too deep as the problem could be a simple one, I think I've found my issue and that is a loose connection on the cas ( crank angle sensor ) a loose connection on the temperature sensor too ( as long as thats the one at top front of the engine) I've ordered a second hand ptu as they also seem to cause issues so will have one in the glove Box at all times now. ..

 

Many many thanks for EVERYONES help and input.

 

Cutty.

After reading all the posts on here i think i have a very similar problem (i'm hoping it a duff CAS got one coming soon).My car is a non starter,it stalled and won't start checked earths and electrics,i have a spark (series 2 PTU) new temp sensor and MAF.The knowledge and help on here is invaluable and as i have found upgrading from a little mark 1 uno turbo to a ZX its alittle scary looking under the bonnet but don't be afraid:biggrin:

The Day after I got my zed on the motorway it spat out the ps and alt belts, I pulled over and car wouldnt start couldnt figure out why as it still should of, after puzzling over the bay and checking plugs it seemed as the belt came off it slightly pulled out the tps plug , pushed back in and voila ...still was a hard drive home with no ps haha

You don't get an EML, you get a DTC. The only thing that would cause the EML to be illuminated whilst driving his G-reg car would be a faulty ECU or EPROM. On vary rare occasions (twice I think out of all the Zeds I've worked on or supplied chips for) has the EML been due to firmware issues on the chip itself. Mark Derby's car was one of them.

 

If the car backfired and then didn't start it would have been due to the CAS connection and the subsequent mis-timing of the spark, causing the mixture to explode whilst the intake/exhaust valves were open. Dead PTU, no spark, no backfire, just flooding. If he was playing around with the aircon pulley from the top and heard a click whilst the ignition was on, somehow bringing the car back to life and allowing it to fire up, it'll be the CAS. The CAS makes clicky noises. It's the CAS.

 

But yeah, worth looking into the Series 2 PTU that rarely fails and is definitely not the problem here :wack:

 

Just kidding! I'll look like a right idiot if it's not the CAS, won't I? :laugh:

 

 

 

 

 

 

 

Good job it's the CAS.

 

let us know!