Question about Toyota Tercel
1993 toyota tercel 5sp Manual 274000 km high hydrocarbons and nox during inspection - i tried runing the vehicle through with methelhydrate the vehicle emmissions did come down alot but still is above the passable level. When starting cold in the morning i do have some white smoke as well until the vehicle warms up then dissapates. would cleaning the egr valve help as well replacing the o2 sensor?
Hi you can by cleaning produckt forthis.its also a good thing,
to messure when all filters and spark plugs are changed.
also the oil.using a cleaning produck can gif you some 5pk,
Posted on Oct 18, 2013
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Posted on Jan 02, 2017
You either have had the wrong valve seals installed, they are physically missing, or the valves are incorrect (too loose in the guides/stem too thin). The rocker arm seals will not contribute to your issue. If it did not have the oil smoke before you took the head off, the issue is with whatever the machine shop did. Valve seals have to fit TIGHT, or oil will go down the valve stem into the intake.
Take the head back to the machine shop & tell them to fix it. For free.
Posted on Sep 27, 2008
Both appear to be a lean mixture problem according to my research. Have you run some injector cleaner through it by any chance? What about coolant level, is it staying up, pressure tested, just in case coolant is mixing with fuel via, head or intake gasket leak, and leaning out the mixture. Low fuel pressure will cause lean mixture in some cases, test it or at least change filter if not done recently, or both. Hope that helps.
Posted on Dec 12, 2008
This is a common problem with the 104 engine. I'm assuming it is a c 280. First you need to check a couple of things. Below your intake manifold there is a source vac. line running to a switchover valve located under the plastic cover on your front cam cover. that switch over valve operates your 2ndary air inj. and egr pipes. The codes you have are saying that these 2 systems are not operating. If the source is good take of the plastic cover on your valve cover(held in by 5mm. allen head bolts). the 2 vac lines running under that trough are running to your egr and your 2ndary inj. the 1st is the air inj. the rear one is your e.g.r. valve. If these systems just plain were not operating it would not cause your car to run poorly cold unless there was a vac. leak. Take a vac. pump and apply press. to your e.g.r. valve with engine running and you should notice a rough run when vac. is applied. The 2ndary air inj. is more complicated to test because there is more involved. Fixing this vac. leak will help get your adaptations under control and your vehicle will run a lot better
Posted on May 29, 2009
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