1989 toyota corolla with 4AF engine.....has a small issue....

[madking411]

its carbureted, and previously, it sputtered/backfired/stumbled/popped and all that before i ripped the carburetor out, and fixed the electric choke and replaced some of the vacuum lines. I put the carb back in, and it no longer sputters and all that, but when the engine is warm/hot and in-gear idling, it kinda skips every now and then like: ''vrmmmmmmPTmmmmmmmmPTTmmmmmmmmmmmmPTmmPTmmmm..... ''

I've already done searches on the internet, and nobody can tell me how to fix THAT particular issue. It's not that big of an issue anymore, but it was. And I really want to know how to fix it before it becomes worse again.

I read somewhere that it could POSSIBLY be that the timing needs to be re-adjusted though.....

[green91]

a random misfire like that is often caused by incorrectly gapped or worn out spark plugs. but it could also be that your idle jet fuel mixture is set wrong also

[madking411]

hehehe, im a lil embarassed now....i put up this post, and then i fixed the issue before anyone gave me a real answer.....I got a little ahead of myself...It was the vacuum lines that needed to be replaced. Before, i only had a few done, and then i went out and finished replacing ALL of them, and the car sputters no more!

[green91]

yep, if your old lines get cracked and leak at all it throws the fuel mixture off and will cause a sputter