1996 Chevy S-10 Bad emission

THOMAS S10

MEMBER
1996 CHEVROLET S-10
4 CYL
2WD
MANUAL
260,000 MILES

Hy I've bought me a chevy S10 but I can't get it trough TC because my emission is bad but when it turns in idle it doesn't run sweet and blue smoke comes out of it when I drive it is better when the engine has cooled down for a few ours it starts immediatly but otherwise I have to give full trottle to get is started and have to play with it before it runs sweet, when I pull the MAP sensor a bit then the vacuum laeks and engine runs better for just a moment
thnks in advance
grts

3 Replies

HMAC300

MECHANIC
48,601 POSTS

Get the engine scanned ans see what the codes are to fix it. You may have a valve seal problem along with a needing either a fuel filter or pump.

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Tuesday, June 15th, 2010 AT 7:24 PM

THOMAS S10

MEMBER
2 POSTS

Hi there no codes available fuell filter and pump are new did found out that fuel pressure regulator was busted so changed it and now ir runs good but still not trough TC because CO is still too much lamda values are good does it help when I remove air filter just before I go in the TC?

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Thursday, October 28th, 2010 AT 11:25 AM

HMAC300

MECHANIC
48,601 POSTS

When you get emission tests it is best to change the oil and filter before you go so you get the fuel out of the oil. Fuel will build up in the oil and affect your tests. Then drive the vehicle at least 15 miles on the exspressway if possible. Then go get it tested. This usually takes care of things. If you live on a gravel road and it doesn't matter if it's only a block, your air filter should be changed once a year. If you haven't changed it in a while then it's good to change it.

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Thursday, October 28th, 2010 AT 6:49 PM