Question about Toyota Corolla

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HARD START WHEN ENGINE IS COLD - 1RZ PETROL ENGINE

The engine performs well once it has run the main challenge is to start it when its cold, however it starts when the cold sensor in UNPLUGED.The battery is new,the startor motor is new,plugs are ok.The pressure from the returner pipe is low.Could the pump aslo have effects when the engine is cold?

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  • Toyota Master
  • 20,706 Answers

Old post 9 months
the ECT???? pulled, forces huge extra fueling.
no year, wow
a 1Rz in a corolla , really?
or 1RZE?
what engine,
is it carb or EFI
what year,
what country.
bingo !
corolla's uses a vast number of engine from beginning to now.
and varies by country.

if EFI and cold sensor means ECT (true name)
then that means engine is lean.
low fuel pressure, !
vacuum leaks if MAF based engine,?
partially clogged injectors.

do tell more, and can help, my guess is its a 1RZE engine and not CARB.

Posted on Jan 27, 2015

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  • Toyota Master
  • 967 Answers

Valve clearance is too low. Thanks.

Posted on Jan 23, 2015

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SOURCE: Golf TDI 1998 problem with cold start

hi change the glow plugs and no its not normall there should be no air in the system it is either sucking air or it has not been bled properly last time system was worked on usually when changing the fiter check the whole system for signs of leaks if non found bled the system until you get rid of them yates210456

Posted on Oct 17, 2008

  • 1 Answer

SOURCE: Low speed stalling while engine is warm

My 1994 Caravan with the 3.0L used to stall occasionally when warm at low rpm. Several years ago I read an article on the internet on stalling and hesitation on these vehicles. The writer recommended spraying an entire can of Mopar Combustion Chamber Cleaner {available at any Dodge/Chrysler dealer} into the throttle body while the car is idling. Then shut off the motor and let it set to dissolve the carbon deposits. After a couple of hours, drive the car and try to do at least 5 full throttle starts as traffic allows - floor it, slow down, repeat. This is supposed to burn out the excess deposits and it worked for me. I use this stuff about every 6 months now, and I haven't had a problem with stalling in years. In fact at over 200,000 miles, my Caravan performs better than it did 10 years ago. A can costs around 7 bucks, so its a really cheap fix!

Posted on Feb 28, 2009

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SOURCE: 88 Toy, 22R Carb, hard cold start

in your carburetor there is a priming passage. look in there with the air cleaner out and pump the butterfly it should squirt gas. if it doesn't then you need to open the top part of the carb and clean the hole with a hair clip. if this is not the problem it will be the choke but I'm 70 percent that this is the problem.

Posted on May 25, 2009

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SOURCE: 97 jetta won't start when engine is cold

It sounds like your starter motor could be at fault.

Does it turn over slowly,or not at all with out the jum leads?

Posted on Jun 28, 2009

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SOURCE: mazda protege 96 very hard to start when cold,

check the mas air flow sensor(is this the 6 cyl) the sensor has a problem with the nose piece inside not moving enough to tell the ecm the propper air flow for the cold start,also check throttle valve for dirt build up around it-if its a four cyl repost

Posted on Oct 05, 2009

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