VR6 non start and backfire

[simonsxi 0]

Hi guys n girls,anybody any ideas for my little problem.Got a 96 rado vr6 107kon clock recently started to non start on key turns but not firing straight away seems to start then die, with throttle can sometimes get it to start first time,sometimes a small backfire is noticed as well,had new plugs last month leads and coil pack in 08.have just changed small blue sensor in cooling housing for comp,last time i checked with vas no faults found except for engine speed sensor.when running she's a dream :confused4: :confused4: any help apperciated

[will.s 0]

i have baught his car and the problem remains haha

[Skyway 0]

Best of luck fella!!!

 

I've also recently had the exact same situation, used to keep trying to start it but just faded away after the first turn of the engine, when she eventually started there where no problems at all. Did the usual checks but didn't find anything standing out as the problem. Luckily for me I had spare parts available so after 3 new sensors, a coil pack, full service inc leads and plugs, x2 ignition switches (as the first packed up and VAG replaced) and numerous relays I still had the fault and still getting the back fire when it eventually started from all of the unburnt fuel.... god knows how much it's buggered up my cat.... Had Vag Com plugged in AGAIN and found no faults! It was only when I went back to checking fuses/relays one day I removed the fuse box shelf did my checks and tryed the ignition again and 'heh presto' she started, thought great and as I slotted the shelf back in she died instantly! Removed the shelf again, checked everything, all ok then turned the key and she started with no problems again, shelf went back in....engine cut out.

 

Now, after several HAPPY hours rewiring and replacing connectors into the fuse box no more problems. Whether it's an age thing on them or over time corrosion has set in through either a leak or condensation I don't know but it's sorted now and I've checked all the all possible areas for leaks and all is good. What a bloody nightmare! Was also good to check around the ECU and it's connector, I had loads of wet old leaves in there that would have eventually contributed to more problems. A good clean out and spray of WD40 sorted that one.

 

Can't say this is the answer for everyone but I always seem to come across this problem being discussed on the Forum and where there is some fantastic advise given it was only a fluke that I located my fault....

 

Hope you get it sorted bud. :salute:

[RW1 0]

Try cleaning the ISV next to th ethottle body on the passenger side under the back engine cover that carries th erear 3 ignition leads. Plenty of topic material on cleaning a ISV if you search.

 

viewtopic.php?f=1&t=97098&hilit=+isv+exercise&start=0

my third post in the topic

 

.

[dr_mat 0]

Also suspicious that the temp sensor was replaced and now it won't start .. If you're savvy with VAG-COM try to find out what the temperature sensors are reading, make sure they make sense.

[Rinse 0]

Would this not be the MAF thats causing this if its dying when ticking over then dying but when giving it some throttle its running?

[dannyboy 0]

Nice to see a fellow REME bod on here Skyway as well as a corrado owner!! :wave:

[C488ADO 0]

DAMPER BOX?

[dannyboy 0]

does the exhaust smell of raw fuel on startup?

[will.s 0]

not really no, it did when the coilpack went though

[dannyboy 0]

sounds like wiring is loose somewhere,when you start it the vibrations knocking the connection/ plug/wiring off. sounds silly but ive seen it lots of times. and its a pain to find

[will.s 0]

bump! problem still persists and is terrible in this weather :(