when i start my truck in the morning it idle a little rough but after it warms up for 15 minutes and i drive to work (about 10 miles) it runs really smooth any ideas?
thanks
juan

 

My truck used to do the same thing. Turns out that the choke flap wouldnt close because my carb was a piece of crap. Try choking it manually by putting your hand over the half of the carb. (covering half of both barrels not covering a whole barrel.) If it is a EFI engine i wouldn't know what to tell you except maybe buying a new throttle body.

 

You will need to post more information about your truck for people to help. Make, model, engine, etc...

 

sounds like a H/G issue to me...

 

H/G? I'm not familiar with that term. care to explain?

 

thanks for all the help forgot the most important pieces:
87 4 runner
22re motor
SR5
not sure what H/G is though
thanks again for the help
juan

 

coolant temp sensor maybe?

 

Is it cold where you live. Alot of cars stuble and stuggle in the cold.

 

h/g is head gasket. Alot of times when you have a small internal h/g leaking into your cylinders, it will run rough with the coolant in the motor from sitting but after it clears out it runs ok then

 

would i see smoke(when i gave it gas) if my h/g was was bad? and would i loose some radiator fluid?? with regards to the cold....i live in california it rarely gets too cold. would a coolant temp sensor cause this problem
thanks
juan

 

make sure you do not have air in the coolant lines burp you coolant system
also make sure you do not have a air leak in between your air flow sensor and throttle body sensor my 4runner when it was cold out the rubber would get hard and it had a crack that would leak once it got warm it would get soft and seal it self back up.

 

not sure how burp the coolant system, can you explain??
thanks

 

run it with the cap off for 2-3 min always worked for me, but that may be incorrect. My money is still on temp sensor (or wires leading to it)

 

thanks for the info
juan

 

Does the engine go into a fast idle when it's first started up? Does it continue to idle a little faster than normal before it reaches normal operating temp? If not, your Auxiliary Air Valve is clogged or dead.

 

no not at all...it starts up(when cold) at around 600,700 rpm's.. where is the auxiliary air valve...checked out the manual and it barely says anything about it, is this a costly part?? I've checked auto zone i cant seem to find it? thanks for all the help.
juan

 

well changed out the temp sensor idle sounds pretty good...thanks for the info, i also changed out the temp sending unit because it was acting a little buggy and to no avail it did not fix the problem does any one have any suggestion on what else it might be??? i also checked the wires and the look ok..... i have a 87 runner 22re, thanks again for all the help....
juan

 

Ohm out the auxiliary air valve. If it ohms out fine, then the orifice is probably just clogged.

 

Thanks for the response.... not to sure were the auxiliary air valve is?? can you direct me as where it is?? Still pretty green on wrenching on my toyota.
thanks
juan

 

i need to know where this air valve is on my 22RE 1988 also!
and what is the ohms it is supposed to read ?? how to test it ??


i have cold temp lean sputtering problem especially low rpm load.. miss, chug, jerk

when its fully warmed up it runs great and lots of power

idle speed always normal, hot or cold, a little miss in the cold idle though, shake in engine idle when cold


MAF is good

TPS is known to be bad
TB unit i removed and cleaned, intake is full of gunky tarry nasy carbon

plugs are VERY dry and light tan

cooling system is perfect, pressure holds good, no leaks ever, no missing fluid ever in 4 years that ive owned it, daily driver 145k miles always reliable



thanks