No idle after choke shuts off

[chainman31]

Has anybody had this problem?

I have a 87 GL wagon with the 1800 OHV, hitachi carb. It runs great in the morning until the choke shuts off, then it won't idle, and has no power.

I did a search, and I could find no similiar problems.

Please help..

[ryry46d9]

after it is warm will it idle?

and also when the choke is on what are the RPM's ?

[daeron]

chainman: look at the "similar threads" listed below. thats often better than the search feature.

[chainman31]

Thanks for intrest - With the choke on, the RPM's are 2000.

 

And after 5-10 minutes of driving ( car is warm - choke shuts off I think) it will not idle, and when running it lurches and has no power.

[bgd73]

My 87 does this too but keeps idling at 250 or less vibrating things only when cold. The idle when warm and high idle screws are different and have to be guaged to each other. I don't personally guage it, I tinker back and forth between the 2 until it reaches a happy medium. This time of year is good for that as it dips below freezing and climbs well above it. I did find there is a small prob below freezing, so to assume water is in there somewhere would be something to consider- lurching when cold could very well be water if all adjustments are good. I may change the metal antique float for the carbon replacement at napa. The below freezing prob has been on every carbed car I have ever owned since 1987 when I started driving. Taking metal away where possible is a good idea for the carb- they run frigid even with subarus oem "heat rising gadgets" all over the engine and waiting until full warm as you dive into traffic first thing in the morn is not fun..That is where I am at now. They do get going quite well if everything is adjusted and fuel is and air is good.

 

EDIT: almost forgot ... I did take one apart and it was the float sunken past the limits not filling up the bowl properly- a warm engine can handle this, a cold one cannot. The metal continues to work fine adjusted, but after getting water, then ice, something was too dang stubborn in the carb and associated with the metal float. Everything mentioned is of course knowing there is no vacuum leaks, etc.