Engine running rough.. Black smoke in exaust

[lj]

i have a 1.3L g13B.

I was playing around in my car on the weekend and i revved it to 5000rpm once before changing gears. After i did this the engine now idles
really rough and there is a very strong smell of fuel coming from the exhaust. Also when i first start it up in the mornings it doesnt run properly when in the lower rpm 1000-2500. it sounds sort of like only a couple of cylinders a firing when its cold. there is also a very faint black smoke in the exhaust when its idling.

any help appreciated

[Lil'Loki]

Sounds like your running a bit rich in the fuel/air mixture.
Start off by giving it a good service with some new spark plugs, filters and oil.
If it's running on a couple of cylinders your plugs may be fouled by soot, caused by a rich fuel/air mixture, which could mean your auto choke is stuck on or if you've got a manual choke you've forgotten to push it back in at some stage. Otherwise it may be time to re-kit your carburetor.

Others on here may have some other suggestions.

Good luck.

[want33s]

Check your spark plugs for condition and spark..
If they are all good, do a compression test.
Jas.

[Lil'Loki]

Check your spark plugs for condition and spark..
If they are all good, do a compression test.
Jas.

Actually do this first, if money's tight you can always clean the existing plugs as long as they are only fouled (not warn).

[lj]

Thanks for the quick replys.

Is there any reason that it would start after i revved it hard if it was a spark plug issue?

[want33s]

Thanks for the quick replys.

Is there any reason that it would start after i revved it hard if it was a spark plug issue?

If the plugs are really old you may have lost the electrode off one of them or maybe just fouled it with carbon.

[Lil'Loki]

At what time did you rev it hard?

In the morning when it was cold or had you warmed the engine up sufficiently before you decided to make it squeal like a banshee?

[lj]

No it was well and truly warm. I dont take it over 2500 before its warmed up. Its the first time ive had it over 4000

[Lil'Loki]

Shouldn't be any ring damage them and your compression should be fine, but it wouldn't hurt to do a compression test. Especially if the motors getting a bit old.

Start with the plugs and if it's still running rough, a compression test and then move on to looking at the carburetor for problems.

[lj]

ok i replaced the spark plugs today. the old ones were all covered in soot. i checked them on saturday and they were clean so this has only just happened. the car still runs rough so im guessing its a problem with the carby? will driving the car while its running rich cause any damage? ive got a weber sitting at home waiting for an air filter so i dont really want to have to rebuild the standard carby.

[want33s]

Weber.. You must be burdened by a wallet full of cash..
They use a lot more fuel than the Aisin carby and unless expertly tuned don't go any better.
Have you done a compression test to see if it's worth spending money on the motor?
Jas.

[foolsp33d]

mine was running pretty rough at one stage, quiet knocky, still had power to pull through gears but idle was ROUGH as GUTS..

http://s82.photobucket.com/albums/j277/ ... ensuzi.flv

ended up being a broken piston/skirt, well two actually...
went down the EXACT same path your goin down, plugs were fouling, replaced and inspected, problem still occured...

my answer was a new engine.. fixed that problem RIGHT up!

[lj]

My motor was rebuilt about 20k ago so i hope its not an internal issue

[built4thrashing]

give it s full service. plugs, leads, oil, filters, and timing. Make sure everything is set right. Could even be a blockage in the carby.

Check all the vac lines. a vac leak could cause the excessive fuel use and rough idle.

B4T