Won't start now...

[Jamescmr2]

so i stripped apart all the ancillaries on my 89 Scirocco (1.8 8v k-Jetronic) fuel system, vacuum system etc. cleaned the throttle body and rocker cover up. Re routed all the hoses and wires etc to tidy up the engine bay, really pleased with the result and now it won't start!

I adjusted the airflow plate, in the airbox, to the correct spacing (haynes manual directed) but apart from that everything went back the same. Even if i had adjusted this worng it should still run just poorly!

It turns over and there is spark so i figure it must be fuel. It doesn't even splutter or anything. I cracked of a fuel line near the filter and there was pressure (got sprayed :-)). tried to start it again and it spluttered once then just carried on turning over. I then cracked off each fuel hose leading the the injectors one at a time (trying to let the air out) and as before straight away it felt like it was going to fire up straight away then just carried on turning over.

I'm wondering if there might be an airlock or something like that.


Any ideas.... anyone?

cheers

James

Edited by Jamescmr2 on Sunday 13th June 21:52

[Tame Technician]

Jamescmr2 said:

I adjusted the airflow plate

Thats why it wont start, never mess with these.

Try having someone crank the starter while you push the K jetronics plate down with your finger, push down further = more fuel.

Which way did you adjust it, up or down?

[Jamescmr2]

thanks for the reply, really appreciated.

the haynes manual said the highest point, of the plate, should be between flush and 0.5mm below the end of the upper conical section. mine was quite far below this so i adjusted the spring to make the plate sit at rest higher.

interested in your thoughts.

cheers

James

[ymwoods]

Jamescmr2 said:

thanks for the reply, really appreciated.

the haynes manual said the highest point, of the plate, should be between flush and 0.5mm below the end of the upper conical section. mine was quite far below this so i adjusted the spring to make the plate sit at rest higher.

interested in your thoughts.

cheers

James

I would just put the plate back how it was and see if it will start...this seems the easiest test.

[aka_kerrly]

how long has the car been apart. I have found in the past with KJet cars that the plunger inside the metering head gets stuck and will not distribute fuel beyond the metering head. A technical "TAP" with a hammer on top of the metering head can sort it. Plus there is a pressure relief valve on the front of the meterin unit - 19 or 22mm nut iirc, crack this out, check the spring on it is lubed and moves and try again.

Usually you find the first start up is horrible but once its run for a few min and fresh fuel lubricates the inside of the metering unit all is well.

Dave

[Jamescmr2]

cheers guys, really appreciate the tips. I use the Noble section of the forum and it is fantastic, nice to see other forums are ass useful. Other websites got no reply!!

car was only apart for a couple of weeks but i'm gonna try a few things before going back to the old setting i think.

thanks again