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Engine Specific Info and Questions => IDI Engine => Topic started by: briandownunda on April 11, 2008, 12:02:23 pm

Title: 1989 Jetta 1.6 non-turbo, black smoke under load
Post by: briandownunda on April 11, 2008, 12:02:23 pm

My Jetta has approx. 125k miles on it, has been pretty well taken care of, seems to run pretty well, however, it does emit quite a bit more smoke than my old '81 rabbit used to....the mileage isn't quite as good either.

Any recommendations on what to do to reduce/eliminate the black smoke & also, perhaps what to check to improve the mileage ?

I get < 40MPG combined city/road.....I used to get up to 50MPG with similar driving style with my old '81 rabbit.

Thanks in advance !

Title: 1989 Jetta 1.6 non-turbo, black smoke under load
Post by: burn_your_money on April 11, 2008, 12:15:23 pm

air filter is clean?

Title: 1989 Jetta 1.6 non-turbo, black smoke under load
Post by: vegfuel on April 11, 2008, 01:57:13 pm

check you timing

Title: 1989 Jetta 1.6 non-turbo, black smoke under load
Post by: foxracer1 on April 11, 2008, 02:21:07 pm

All of the above and check fuel filter.

Title: 1989 Jetta 1.6 non-turbo, black smoke under load
Post by: zukgod1 on April 11, 2008, 02:56:57 pm

Quote from: "burn_your_money"

air filter is clean?

X2

Title: 1989 Jetta 1.6 non-turbo, black smoke under load
Post by: briandownunda on April 11, 2008, 08:39:42 pm

Thanks for all the replies, I will check all suggested and get back.....what about fuel injectors, if they are the originals, could they be causing the black smoke ?

Title: 1989 Jetta 1.6 non-turbo, black smoke under load
Post by: burn_your_money on April 11, 2008, 11:17:44 pm

definitely

Title: 1989 Jetta 1.6 non-turbo, black smoke under load
Post by: briandownunda on April 18, 2008, 01:20:41 pm

I've replaced the air filter, but that didn't really help.  If I remove the fuel injectors, how can I tell if they are bad, vs. just need cleaning ?