What Is Going On?

[powermandan 0]

Ok , well im going to start from the beginning....

 

Picked up a 1988 1.6 205 GTI on sunday, bought it with idling problems. however it ran fine when it had warmed up

 

first is suspected the SAD was causing the Bad idle; http://forum.205gtidrivers.com/index.php?showtopic=118129

 

Anyway, i found the bolt from the inlet was indeed missing. so i started her up and plugged the hole with my finger and to my surprise i found it then idled fine for about a minute until i turned the engine off.

 

Then i placed a bolt in said hole and went to start the car, no joy......

 

So i removed the bolt again and the best i could manage to get it to do is rev up to 4-5000 (miss firing a lot) then die.....

 

- other stuff i know

 

- recently had new plugs and rotor arm

- had a cambelt done before being sold to me (never properly driven on new cambelt)

- SAD is questionable

- not sure if previous owner messed with any of the screws on AFM or throttle body

- compression is 200psi on cylinder 2

- strong spark on all cylinders

- can hear the fuel pump running

- stop light flickers on and off although oil pressure seams good.

- crank shaft pulley bolt is FT

 

stuff im going to try tommorow

 

- take the proven SAD of my 1.9 GTI see if that helps

- Check the cambelt timing.

 

 

 

So there you, all thoughts and suggestions welcome HELP!

Edited April 12, 2010 by powermandan

[welshpug 1,666]

I'd suggest getting a Haynes manual and working through the fuel system section in it, it had loads of information on setting up the throttle initial settings, throttle switch, and AFM, but there's no information in there if someone has tampered with the spring tension though.

 

m@tt on here has an online copy of the Haynes manual in his signature.

[brumster 135 1 Cars]

If you can get it to run, albeit roughly, and suspect an air leak then spraying carb cleaner around various parts of the manifold can show up where the holes are. I had a very similar rough idle and low-rpm rough running (up to about 3k-4k) problem, turned out to be a simple split in the inlet manifold gasket that was seeping air in and had also spun around one of the bolt holes and was effectively blocking the firing line of the injector. Not saying it IS an air leak, but just suggesting a useful course of action to help diagnose, if it is.

[powermandan 0]

i was thinking about trying to run it on easy start? would proberbly prove the timing and the ignition?

[mattmalden 0]

Finding air leaks.

 

Get yourself a length on hose about a metre long and 1 inch in diameter. Place it to your ear and (if you can get it running) move the the other end into areas that are suspect for leaks. If it's sucking you'll be able to hear it through the hose. A bit like using a stethescope. The old ways are usually the best in my opinion!!