SOURCE: Rough idle until warm 22r
if it is a carburated engine it is probably the a.a.p. diaphragm in the carb. if you remove the air cleaner and look on the side of the carb that is towards the valve cover near the front yow will see a vacuum hose going to a cover that is fastened with 3 screws. if you pull the vacuum line off you will see that there is probably fuel being sucked into the line due to the leaking diaphragm. the vacuum source is temp controlled and cuts off when warm. but when cold sucks fuel directly into the intake. remove the 3 screws to replace the diaphragm, being carefull of the spring. good luck!
SOURCE: 87 Supra idles rough and dies out
I would suspect a vacuum leak. At idle under high vacuum the air fuel mix is being leaned out until you have misfiring so bad the engine quits. The exhaust smells rich because even a lean mixture, if it doesn't light off, if full of unburned fuel. At road speeds, the vacuum is low so the engine doesn't care if there is a small leak somewhere. It is getting most of its air through the open throttle. Check all your vacuum lines but remember that even if every line is okay, it could still be leaking from an old cracked intake manifold gasket.
SOURCE: runs but wont idle. smells to rich. other than that it runs fine
This sound like a vacuum leak... Look carefully for loose/cracked hoses and connections from the fuel distributor/air box to the throttle body and around the idle enrichment bypass hoses... and also the intake gasket itself. The reason it smells rich is that the injectors are firing more to compensate for the lean running condition. It you run it this way too long it will overheat and warp the head or **** a valve... Hope this helps...;-)
SOURCE: 1993 nissian p/u run rich and it running real rough
If it is a carb engine have the air fuel mixture corrected by adjusting the screws on the carb. Try also adjusting the idling.
For EFI engines see if you can check the Idle Control Solenoid Valve, have it cleaned. You can also check the oxygen sensor if it is working or not
SOURCE: idle is rough and rich after warming up 1986 toyota 4wdwagon 3 ac
sounds like you are not geting the right amount of air to fuel system.Have you checked the air filter is clean.Change the air flow senser if it is clean.Good luck!!
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