Rough idle at cold start . Is it injector, thermostat, vapor purge canister, gasket, vacuum leak? MAF and 4 igniters were swap with another corolla that was supposedly running fine.


Asked by Jul 04, 2014 at 03:31 AM about the 2000 Toyota Corolla CE

Question type: Maintenance & Repair

Yes, I have check the plugs. Discover
that the fuel pump unit was missing
necessary O rings to keep the unit
taut under working pressure. So the
car seems to run fine, after changing
out duel filter and strainer.  SAVE  
one thing, well maybe two things.  
The car starts now, but at cold start  I
needed 2-3 cranks to get it to start --
I may have damaged the stsrter?  
The cold start has a rough idle or the
engine lopes it seems.  A few pump
of the gas, the engine will surge to
higher RPM and stay around or
above 1000RPM til warms up but will
drop down to 750RPM or so after 5-
10min. I drove the car around for
several miles, has good acceleration
and idles seemingly normal at 700-
750RPM, engine light came on.
Checked the code, 0171 lean bank1.  
300 random fire.  302,304 misfire.  
Let car cool. Disconnect battery.
Reconnect after few min, car Rough
idle start 400-600RPM.  Try to
maintain idle by pumping gas pedal.  
Car warmed up but rough idle
remains.  Hesitate when try to
accelerate or back up.  10-15mph
max.  Drove around block and
parked. Stop car. No codes showed
up.  Disconnect battery a few min,
reconnect.  Crank engine 2 times, car
start weakly but idle good at
750RPM.  Car Drove fine.  Code
0171, lean bank1.

2 Answers

Jerry Sims

How many miles sounds like your catalast is clogging in your converter on exhaust!!

2 out of 2 people think this is helpful.

What are the symptoms of catalytic converter clogged? Wouldn't I have the problem all the time?

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Toyota Corolla Questions

Toyota Corolla Experts

#1 FordNut
Reputation 15,030
#2 Tom Demyan
Tom Demyan
Reputation 2,090
#3 tenspeed
Reputation 1,750
View All

Related Models For Sale

Used Toyota Camry"
1,666 Great Deals out of 98,110 listings starting at $895
Used Honda Civic"
1,190 Great Deals out of 58,109 listings starting at $1,300
Used Honda Accord"
1,344 Great Deals out of 77,641 listings starting at $1,395
Used Toyota RAV4"
1,184 Great Deals out of 48,701 listings starting at $2,495
Used Nissan Altima"
1,452 Great Deals out of 87,459 listings starting at $1,195
Used Nissan Sentra"
917 Great Deals out of 49,513 listings starting at $500
Used Toyota Tacoma"
647 Great Deals out of 30,207 listings starting at $2,850
Used Hyundai Elantra"
850 Great Deals out of 51,294 listings starting at $1,995
Used Toyota Yaris"
100 Great Deals out of 7,083 listings starting at $1,995
Used Honda CR-V"
1,563 Great Deals out of 80,336 listings starting at $1,695
Used Toyota Prius"
518 Great Deals out of 24,656 listings starting at $1,795
Used Hyundai Sonata"
999 Great Deals out of 51,695 listings starting at $1,200
Used Ford Focus"
1,214 Great Deals out of 56,889 listings starting at $1,495
Used Toyota 4Runner"
354 Great Deals out of 18,779 listings starting at $2,400

Used Cars For Sale

2017 Toyota Corolla For Sale
21,806 listings starting at $16,843
2016 Toyota Corolla For Sale
90 Great Deals out of 17,073 listings starting at $9,998
2015 Toyota Corolla For Sale
355 Great Deals out of 7,185 listings starting at $9,990
2014 Toyota Corolla For Sale
307 Great Deals out of 5,842 listings starting at $8,883
2013 Toyota Corolla For Sale
255 Great Deals out of 3,931 listings starting at $6,990