Club 80-90 Forums

hi i am looking for a bit of advice regarding my van. Recently when starting for the first 5 minutes or so the engine runs really rough at idle speed. If i dont give it some accelerator it cuts out completely. When the engine is about to cut out the battery light flickers on. I have a brand new bosch 74 amh battery and the alternator appears to be working fine according to a volt meter. After 5 or so minutes the engine runs like normal no rough idle at all. any help would be brilliant. cheers

Engine size, fuel type and age?

Oh sorry its a 1986 watercooled 1.9l petrol. cheers

remove the pancake duct and look at the top of the carb
check the choke flap gap it should be 3mm when cold

X value is 3 mm
A is the flap


do you set the cold idle speed before you crank the engine?
by pressing the accelerator once or twice fully

sorry to be ignorant but what is the pancake duct ?

The black thing on top of your carburetor



here it is with the three holding nuts

once removed you'll see this



put a 3mm drill bit into the gap to check it

Thanks a lot i will take a look tomorrow. cheers

do you set the idle speed before you crank the engine when it's cold?

i always depress the accelerator a couple of times then start the engine with the clutch in. Is this what you mean?

yes that's OK then

hi there i have just checked the flap and the gap at the highest point is 3mm but at the lowest point it is larger than 3mm. more like 5mm or so. do i need to adjust the flap?

yes adjust to 3mm.. use the Haynes it's quite straight forward